{"id":516,"date":"2011-08-08T13:12:11","date_gmt":"2011-08-08T13:12:11","guid":{"rendered":"http:\/\/www.mysqltutorial.org\/?page_id=516"},"modified":"2024-01-05T19:34:24","modified_gmt":"2024-01-06T02:34:24","slug":"mysql-datediff-function","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/mysql-date-functions\/mysql-datediff-function\/","title":{"rendered":"MySQL DATEDIFF() Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the MySQL <code>DATEDIFF()<\/code><strong> <\/strong>function to calculate the number of days between two <code>DATE<\/code> values.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to MySQL DATEDIFF() function<\/h2>\n\n\n\n<p>The <code>DATEDIFF()<\/code> function calculates the difference in days between two dates.<\/p>\n\n\n\n<p>Here&#8217;s the basic syntax of the <code>DATEDIFF()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">DATEDIFF(end_date,start_date);<\/code><\/span><\/pre>\n\n\n<p>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>end_date<\/code>: The date to which you want to calculate the difference.<\/li>\n\n\n\n<li><code>start_date<\/code>: The date from which you want to calculate the difference.<\/li>\n<\/ul>\n\n\n\n<p>The <code>DATEDIFF()<\/code> function returns an integer that represents the number of days between two dates.<\/p>\n\n\n\n<p>If <code>end_date<\/code> or <code>start_date<\/code> is <code>NULL<\/code>, the <code>DATEDIFF()<\/code> function returns <code>NULL<\/code>.<\/p>\n\n\n\n<p class=\"note\">Notice that the <code>DATEDIFF()<\/code> function considers only the date components for calculation and disregards the time components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL DATEDIFF examples<\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the <code>DATEDIFF()<\/code> function<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Simple DATEDIFF() function example<\/h3>\n\n\n\n<p>The following example uses the <code>DATEDIFF()<\/code> function to calculate the difference between two <code>DATE<\/code> literal values:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n  <span class=\"hljs-keyword\">DATEDIFF<\/span>(<span class=\"hljs-string\">'2011-08-17'<\/span>, <span class=\"hljs-string\">'2011-08-17'<\/span>) <span class=\"hljs-keyword\">days<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a class=\"sql\" href=\"https:\/\/www.mysqltutorial.org\/tryit\/query\/mysql-datediff\/#1\" target=\"_blank\" rel=\"noopener noreferrer\">Try It Out<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">+------+\n| days |\n+------+\n|    <span class=\"hljs-number\">0<\/span> |\n+------+\n<span class=\"hljs-number\">1<\/span> row <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-keyword\">set<\/span> (0.00 sec)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following example uses the <code>DATEDIFF()<\/code> function to calculate the number of days between <code>2011-08-17<\/code> and <code>2011-08-08<\/code>:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n  <span class=\"hljs-keyword\">DATEDIFF<\/span>(<span class=\"hljs-string\">'2011-08-17'<\/span>, <span class=\"hljs-string\">'2011-08-08'<\/span>) <span class=\"hljs-keyword\">days<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a class=\"sql\" href=\"https:\/\/www.mysqltutorial.org\/tryit\/query\/mysql-datediff\/#2\" target=\"_blank\" rel=\"noopener noreferrer\">Try It Out<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">+------+\n| days |\n+------+\n|    <span class=\"hljs-number\">9<\/span> |\n+------+\n<span class=\"hljs-number\">1<\/span> row <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-keyword\">set<\/span> (0.00 sec)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">2) Using DATEDIFF() function with table data<\/h3>\n\n\n\n<p>We&#8217;ll use the <code>orders<\/code> table in the <a href=\"https:\/\/www.mysqltutorial.org\/getting-started-with-mysql\/mysql-sample-database\/\">sample database<\/a>:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2023\/10\/orders.svg\" alt=\"\" class=\"wp-image-10769\"\/><\/figure>\n\n\n\n<p>The following example uses the <code>DATEDIFF()<\/code> function to calculate the number of days between the required date and the shipped date of each order::<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n  orderNumber, \n  <span class=\"hljs-keyword\">DATEDIFF<\/span>(requiredDate, shippedDate) daysLeft \n<span class=\"hljs-keyword\">FROM<\/span> \n  orders \n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span> \n  daysLeft <span class=\"hljs-keyword\">DESC<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a class=\"sql\" href=\"https:\/\/www.mysqltutorial.org\/tryit\/query\/mysql-datediff\/#4\" target=\"_blank\" rel=\"noopener noreferrer\">Try It Out<\/a><\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">+-------------+----------+\n| orderNumber | daysLeft |\n+-------------+----------+\n|       10409 |       11 |\n|       10410 |       10 |\n|       10105 |        9 |\n|       10135 |        9 |\n|       10190 |        9 |\n|       10201 |        9 |\n...<\/code><\/span><\/pre>\n\n\n<p>The following statement gets all orders whose statuses are in process and calculates the number of days between the ordered date and the required date:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n  orderNumber, \n  <span class=\"hljs-keyword\">DATEDIFF<\/span>(requiredDate, orderDate) remainingDays \n<span class=\"hljs-keyword\">FROM<\/span> \n  orders \n<span class=\"hljs-keyword\">WHERE<\/span> \n  <span class=\"hljs-keyword\">status<\/span> = <span class=\"hljs-string\">'In Process'<\/span> \n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span> \n  remainingDays;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a class=\"sql\" href=\"https:\/\/www.mysqltutorial.org\/tryit\/query\/mysql-datediff\/#5\" target=\"_blank\" rel=\"noopener noreferrer\">Try It Out<\/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=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">+-------------+---------------+\n| orderNumber | remainingDays |\n+-------------+---------------+\n|       <span class=\"hljs-number\">10423<\/span> |             <span class=\"hljs-number\">6<\/span> |\n|       <span class=\"hljs-number\">10425<\/span> |             <span class=\"hljs-number\">7<\/span> |\n|       <span class=\"hljs-number\">10421<\/span> |             <span class=\"hljs-number\">8<\/span> |\n|       <span class=\"hljs-number\">10424<\/span> |             <span class=\"hljs-number\">8<\/span> |\n|       <span class=\"hljs-number\">10420<\/span> |             <span class=\"hljs-number\">9<\/span> |\n|       <span class=\"hljs-number\">10422<\/span> |            <span class=\"hljs-number\">12<\/span> |\n+-------------+---------------+\n<span class=\"hljs-number\">6<\/span> rows <span class=\"hljs-keyword\">in<\/span> <span class=\"hljs-keyword\">set<\/span> (0.00 sec)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h3 class=\"wp-block-heading\">3) Dealing with NULL  values<\/h3>\n\n\n\n<p>The following example uses the <code>DATEDIFF()<\/code> function to calculate the days it takes from the order date to the shipped date:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">SELECT \n  orderNumber, \n  DATEDIFF(shippedDate, orderDate) orderToShip \nFROM \n  orders \nORDER BY \n  orderDate DESC;<\/code><\/span><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">+-------------+-------------+\n| orderNumber | orderToShip |\n+-------------+-------------+\n|       <span class=\"hljs-number\">10424<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10425<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10422<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10423<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10420<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10421<\/span> |        <span class=\"hljs-keyword\">NULL<\/span> |\n|       <span class=\"hljs-number\">10419<\/span> |           <span class=\"hljs-number\">2<\/span> |\n|       <span class=\"hljs-number\">10418<\/span> |           <span class=\"hljs-number\">4<\/span> |\n|       <span class=\"hljs-number\">10417<\/span> |           <span class=\"hljs-number\">6<\/span> |\n...<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following example uses the <code>IFNULL()<\/code> function to display <code>N\/A<\/code> when the shipped date is NULL<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">SELECT \n  orderNumber, \n  IFNULL(DATEDIFF(shippedDate, orderDate), <span class=\"hljs-string\">'N\/A'<\/span>) orderToShip \nFROM \n  orders \nORDER BY \n  orderDate DESC;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">+-------------+-------------+\n| orderNumber | orderToShip |\n+-------------+-------------+\n|       10424 | N\/A         |\n|       10425 | N\/A         |\n|       10422 | N\/A         |\n|       10423 | N\/A         |\n|       10420 | N\/A         |\n|       10421 | N\/A         |\n|       10419 | 2           |\n|       10418 | 4           |\n|       10417 | 6           |\n...<\/code><\/span><\/pre>\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use MySQL <code>DATEDIFF()<\/code> function to calculate the number of days between two date values.<\/li>\n<\/ul>\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=\"516\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/mysql-date-functions\/mysql-datediff-function\/\"\n\t\t\t\tdata-post-title=\"MySQL DATEDIFF() Function\"\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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values.<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":7032,"menu_order":10,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-516","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>MySQL DATEDIFF() Function<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the MySQL DATEDIFF function to calculate the number of days between two date values.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mysqltutorial.org\/mysql-date-functions\/mysql-datediff-function\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL DATEDIFF() 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