{"id":2574,"date":"2025-04-02T15:13:29","date_gmt":"2025-04-02T08:13:29","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=2574"},"modified":"2025-04-02T16:10:57","modified_gmt":"2025-04-02T09:10:57","slug":"postgresql-interval-data-type","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-interval-data-type\/","title":{"rendered":"PostgreSQL INTERVAL Data Type"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: In this tutorial, you&#8217;ll learn how to manipulate interval values using the PostgreSQL <code>INTERVAL<\/code> data type.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"postgresql-interval-data-type-overview\" id='postgresql-interval-data-type-overview'>PostgreSQL INTERVAL Data Type Overview <a href=\"#postgresql-interval-data-type-overview\" class=\"anchor\" id=\"postgresql-interval-data-type-overview\" title=\"Anchor for PostgreSQL INTERVAL Data Type Overview\">#<\/a><\/h2>\n\n\n\n<p>In PostgreSQL, intervals are time durations such as 2 days, 3 hours, 1 year 6 months.<\/p>\n\n\n\n<p>You use the&nbsp;<code>INTERVAL<\/code>&nbsp;data type to store intervals. The interval type can store intervals in years, months, hours, minutes, seconds, and milliseconds.<\/p>\n\n\n\n<p>Here&#8217;s the syntax for defining a literal value:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'value unit'<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>value<\/code>&nbsp;is a number that indicates a duration.<\/li>\n\n\n\n<li><code>unit<\/code>&nbsp;is the time unit, which can be years, months, hours, minutes, seconds, milliseconds, microseconds, decade, century, and millennium.<\/li>\n<\/ul>\n\n\n\n<p>An interval can consist of multiple units like&nbsp;<code>'1 days 2 hours'<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"postgresql-interval-data-type-examples\" id='postgresql-interval-data-type-examples'>PostgreSQL INTERVAL Data Type Examples <a href=\"#postgresql-interval-data-type-examples\" class=\"anchor\" id=\"postgresql-interval-data-type-examples\" title=\"Anchor for PostgreSQL INTERVAL Data Type Examples\">#<\/a><\/h2>\n\n\n\n<p>The following statement shows how to create an interval of 2 days:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'2 days'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcyIGRheXMnOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">----------<\/span>\n <span class=\"hljs-number\">2<\/span> days<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following statement shows how to combine multiple units in a single interval:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'2 days 5 hours 30 minutes'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcyIGRheXMgNSBob3VycyAzMCBtaW51dGVzJzs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">    <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">-----------------<\/span>\n <span class=\"hljs-number\">2<\/span> days <span class=\"hljs-number\">05<\/span>:<span class=\"hljs-number\">30<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>If you use a decimal value, PostgreSQL will convert it to the corresponding unit:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1.5 hours 30 minutes'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcxLjUgaG91cnMgMzAgbWludXRlcyc7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">----------<\/span>\n <span class=\"hljs-number\">02<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this example, PostgreSQL converts 1.5 hours to 1 hour and 30 minutes and adds 30 minutes, resulting in 2 hours.<\/p>\n\n\n\n<p>The following example uses the decade unit for an interval:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1 decade'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcxIGRlY2FkZSc7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">----------<\/span>\n <span class=\"hljs-number\">10<\/span> years<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"casting-a-string-into-an-interval\" id='casting-a-string-into-an-interval'>Casting a String into an Interval <a href=\"#casting-a-string-into-an-interval\" class=\"anchor\" id=\"casting-a-string-into-an-interval\" title=\"Anchor for Casting a String into an Interval\">#<\/a><\/h2>\n\n\n\n<p>If you have a valid interval string, you explicitly cast it into an&nbsp;<code>INTERVAL<\/code>&nbsp;using the <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-cast\/\">cast operator<\/a> (<code>::<\/code>):<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-string\">'value'<\/span>::<span class=\"hljs-type\">INTERVAL<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-string\">'1 day 10 hours'<\/span>::<span class=\"hljs-type\">INTERVAL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUICcxIGRheSAxMCBob3Vycyc6OklOVEVSVkFMOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">    <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">----------------<\/span>\n <span class=\"hljs-number\">1<\/span> day <span class=\"hljs-number\">10<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"creating-intervals-with-precision\" id='creating-intervals-with-precision'>Creating Intervals with Precision <a href=\"#creating-intervals-with-precision\" class=\"anchor\" id=\"creating-intervals-with-precision\" title=\"Anchor for Creating Intervals with Precision\">#<\/a><\/h2>\n\n\n\n<p>PostgreSQL allows you to specify precision specifications for fractional seconds explicitly:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-type\">INTERVAL second<\/span>(p)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>In this syntax,&nbsp;<code>p<\/code>&nbsp;is the number of fractional digits you want to retain in the interval.<\/p>\n\n\n\n<p>For example, the following creates an interval with two numbers for fractional seconds:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1.123456 seconds'<\/span>::<span class=\"hljs-type\">INTERVAL<\/span>(<span class=\"hljs-number\">2<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcxLjEyMzQ1NiBzZWNvbmRzJzo6SU5URVJWQUwoMik7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output<strong>:<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-15\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">  <span class=\"hljs-type\">interval<\/span>\n<span class=\"hljs-comment\">-------------<\/span>\n <span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">01.12<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"creating-tables-with-interval-columns\" id='creating-tables-with-interval-columns'>Creating Tables with Interval Columns <a href=\"#creating-tables-with-interval-columns\" class=\"anchor\" id=\"creating-tables-with-interval-columns\" title=\"Anchor for Creating Tables with Interval Columns\">#<\/a><\/h2>\n\n\n\n<p>First, <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-create-table\/\">create a table<\/a> that has an&nbsp;<code>INTERVAL<\/code>&nbsp;column:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-16\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> subscription_plans (\n  id <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">GENERATED<\/span> <span class=\"hljs-keyword\">ALWAYS<\/span> <span class=\"hljs-keyword\">AS<\/span> <span class=\"hljs-keyword\">IDENTITY<\/span> <span class=\"hljs-keyword\">PRIMARY KEY<\/span>,\n  <span class=\"hljs-type\">name<\/span> <span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">255<\/span>) <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span>,\n  duration <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span>\n);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-16\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=Q1JFQVRFIFRBQkxFIHN1YnNjcmlwdGlvbl9wbGFucyAoIGlkIElOVCBHRU5FUkFURUQgQUxXQVlTIEFTIElERU5USVRZIFBSSU1BUlkgS0VZLCBuYW1lIFZBUkNIQVIoMjU1KSBOT1QgTlVMTCwgZHVyYXRpb24gSU5URVJWQUwgTk9UIE5VTEwgKTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Second, <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-insert\/\">insert some rows<\/a> into the&nbsp;<code>subscription_plans<\/code>&nbsp;table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-17\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span>\n  subscription_plans (<span class=\"hljs-type\">name<\/span>, duration)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-string\">'6 months'<\/span>, <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'6 months'<\/span>),\n  (<span class=\"hljs-string\">'1 year'<\/span>, <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1 year'<\/span>),\n  (<span class=\"hljs-string\">'3 years'<\/span>, <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'3 years'<\/span>)\n<span class=\"hljs-keyword\">RETURNING<\/span>\n  *;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-17\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=SU5TRVJUIElOVE8gc3Vic2NyaXB0aW9uX3BsYW5zIChuYW1lLCBkdXJhdGlvbikgVkFMVUVTICgnNiBtb250aHMnLCBJTlRFUlZBTCAnNiBtb250aHMnKSwgKCcxIHllYXInLCBJTlRFUlZBTCAnMSB5ZWFyJyksICgnMyB5ZWFycycsIElOVEVSVkFMICczIHllYXJzJykgUkVUVVJOSU5HICo7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-18\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> id |   <span class=\"hljs-type\">name<\/span>   | duration\n<span class=\"hljs-comment\">----+----------+----------<\/span>\n  <span class=\"hljs-number\">1<\/span> | <span class=\"hljs-number\">6<\/span> months | <span class=\"hljs-number\">6<\/span> mons\n  <span class=\"hljs-number\">2<\/span> | <span class=\"hljs-number\">1<\/span> year   | <span class=\"hljs-number\">1<\/span> year\n  <span class=\"hljs-number\">3<\/span> | <span class=\"hljs-number\">3<\/span> years  | <span class=\"hljs-number\">3<\/span> years<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-18\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Third, retrieve plans with the duration 1 year and up:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-19\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> subscription_plans\n<span class=\"hljs-keyword\">WHERE<\/span> duration &gt;= <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1 year'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-19\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-20\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> id |  <span class=\"hljs-type\">name<\/span>   | duration\n<span class=\"hljs-comment\">----+---------+----------<\/span>\n  <span class=\"hljs-number\">2<\/span> | <span class=\"hljs-number\">1<\/span> year  | <span class=\"hljs-number\">1<\/span> year\n  <span class=\"hljs-number\">3<\/span> | <span class=\"hljs-number\">3<\/span> years | <span class=\"hljs-number\">3<\/span> years<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-20\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"calculating-with-intervals\" id='calculating-with-intervals'>Calculating with Intervals <a href=\"#calculating-with-intervals\" class=\"anchor\" id=\"calculating-with-intervals\" title=\"Anchor for Calculating with Intervals\">#<\/a><\/h2>\n\n\n\n<p>You can add, subtract, multiply, and divide intervals. For example, the following adds 7 days to the current timestamp:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-21\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  NOW() + <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'7 days'<\/span> next_week;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-21\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIE5PVygpICsgSU5URVJWQUwgJzcgZGF5cycgbmV4dF93ZWVrOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>The following example subtracts 3 days from the current timestamp:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-22\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  NOW() - <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'3 days'<\/span> three_days_ago;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-22\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIE5PVygpIC0gSU5URVJWQUwgJzMgZGF5cycgdGhyZWVfZGF5c19hZ287\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>To multiply a timestamp, you use the&nbsp;<code>*<\/code>&nbsp;operator:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-23\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1 hour'<\/span> * <span class=\"hljs-number\">24<\/span> result;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-23\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcxIGhvdXInICogMjQgcmVzdWx0Ow%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-24\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">  result\n<span class=\"hljs-comment\">----------<\/span>\n <span class=\"hljs-number\">24<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-24\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>And you can use the division operator (<code>\/<\/code>) to divide an interval:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-25\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'1 day'<\/span> \/ <span class=\"hljs-number\">24<\/span> result;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-25\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIElOVEVSVkFMICcxIGRheScgLyAyNCByZXN1bHQ7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-26\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">  result\n<span class=\"hljs-comment\">----------<\/span>\n <span class=\"hljs-number\">01<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-26\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"extracting-components-from-intervals\" id='extracting-components-from-intervals'>Extracting Components from Intervals <a href=\"#extracting-components-from-intervals\" class=\"anchor\" id=\"extracting-components-from-intervals\" title=\"Anchor for Extracting Components from Intervals\">#<\/a><\/h2>\n\n\n\n<p>To extract interval fields, you use the&nbsp;<code>EXTRACT<\/code>&nbsp;function. For example, the following statement extracts day from an interval:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-27\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  EXTRACT(\n    <span class=\"hljs-type\">DAY<\/span>\n    <span class=\"hljs-keyword\">FROM<\/span>\n      <span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'2 days 5 hours'<\/span>\n  );<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-27\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIEVYVFJBQ1QoIERBWSBGUk9NIElOVEVSVkFMICcyIGRheXMgNSBob3VycycgKTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-28\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> extract\n<span class=\"hljs-comment\">---------<\/span>\n       <span class=\"hljs-number\">2<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-28\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"adjusting-intervals\" id='adjusting-intervals'>Adjusting Intervals <a href=\"#adjusting-intervals\" class=\"anchor\" id=\"adjusting-intervals\" title=\"Anchor for Adjusting Intervals\">#<\/a><\/h2>\n\n\n\n<p>PostgreSQL provides three functions for adjusting intervals:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>JUSTIFY_HOURS<\/code>: adjust excess hours into days.<\/li>\n\n\n\n<li><code>JUSTIFY_DAYS<\/code>: adjust excess days into months while handling leap year accurately.<\/li>\n\n\n\n<li><code>JUSTIFY_INTERVAL<\/code>: adjusts months to years and days to months.<\/li>\n<\/ul>\n\n\n\n<p>For example, the following statement uses the&nbsp;<code>JUSTIFY_HOURS<\/code>&nbsp;to adjust an interval:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-29\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> JUSTIFY_HOURS(<span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'26 hours'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-29\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIEpVU1RJRllfSE9VUlMoSU5URVJWQUwgJzI2IGhvdXJzJyk7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-30\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> justify_hours\n<span class=\"hljs-comment\">----------------<\/span>\n <span class=\"hljs-number\">1<\/span> day <span class=\"hljs-number\">02<\/span>:<span class=\"hljs-number\">00<\/span>:<span class=\"hljs-number\">00<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-30\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following statement uses the&nbsp;<code>JUSTIFY_DAYS<\/code>&nbsp;to adjust excess days into months:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-31\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  JUSTIFY_DAYS(<span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'75 days'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-31\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIEpVU1RJRllfREFZUyhJTlRFUlZBTCAnNzUgZGF5cycpOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-32\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">  justify_days\n<span class=\"hljs-comment\">----------------<\/span>\n <span class=\"hljs-number\">2<\/span> mons <span class=\"hljs-number\">15<\/span> days<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-32\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following example uses the&nbsp;<code>JUSTIFY_INTERVAL<\/code>&nbsp;to adjust excess months to years and days to months:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-33\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span>\n  JUSTIFY_INTERVAL(<span class=\"hljs-type\">INTERVAL<\/span> <span class=\"hljs-string\">'13 months 30 days'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-33\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=blank&amp;q=U0VMRUNUIEpVU1RJRllfSU5URVJWQUwoSU5URVJWQUwgJzEzIG1vbnRocyAzMCBkYXlzJyk7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-34\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"> justify_interval\n<span class=\"hljs-comment\">------------------<\/span>\n <span class=\"hljs-number\">1<\/span> year <span class=\"hljs-number\">2<\/span> mons<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-34\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id=\"summary\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use&nbsp;<code>INTERVAL 'value unit'<\/code>&nbsp;to create an interval.<\/li>\n\n\n\n<li>Use the cast operator (<code>::<\/code>) to cast a string into an interval.<\/li>\n\n\n\n<li>Use the&nbsp;<code>EXTRACT<\/code>&nbsp;function to extract a component from an interval.<\/li>\n\n\n\n<li>Use the&nbsp;<code>JUSTIFY_HOURS<\/code>,&nbsp;<code>JUSTIFY_DAYS<\/code>, and&nbsp;<code>JUSTIFY_INTERVAL<\/code>&nbsp;functions to adjust intervals.<\/li>\n\n\n\n<li>Perform interval arithmetic operations using the operators (<code>+<\/code>,&nbsp;<code>-<\/code>,&nbsp;<code>*<\/code>,&nbsp;<code>\/<\/code>).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='quiz'>Quiz <a href=\"#quiz\" class=\"anchor\" id=\"quiz\" title=\"Anchor for Quiz\">#<\/a><\/h2>\n\n\n\n<iframe loading=\"lazy\"\n  name=\"quiz\"\n  src=\"\/quiz\/?quiz=interval\"\n  height=\"700\"\n  width=\"600\"\n  class=\"iframe\"\n><\/iframe>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful ?<\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"2574\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-interval-data-type\/\"\n\t\t\t\tdata-post-title=\"PostgreSQL INTERVAL Data Type\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 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