{"id":2132,"date":"2025-02-17T09:24:41","date_gmt":"2025-02-17T02:24:41","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=2132"},"modified":"2025-02-17T09:25:35","modified_gmt":"2025-02-17T02:25:35","slug":"postgresql-regexp_split_to_array","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-string-functions\/postgresql-regexp_split_to_array\/","title":{"rendered":"PostgreSQL REGEXP_SPLIT_TO_ARRAY Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PostgreSQL <code>REGEXP_SPLIT_TO_ARRAY<\/code> function to split a string into an array of text based on a POSIX regular expression as a delimiter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='postgresql-regexp_split_to_array-function-overview'>PostgreSQL REGEXP_SPLIT_TO_ARRAY Function Overview <a href=\"#postgresql-regexp_split_to_array-function-overview\" class=\"anchor\" id=\"postgresql-regexp_split_to_array-function-overview\" title=\"Anchor for PostgreSQL REGEXP_SPLIT_TO_ARRAY Function Overview\">#<\/a><\/h2>\n\n\n\n<p>The <code>REGEXP_SPLIT_TO_ARRAY<\/code> function splits a string into an array based on a <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-regular-expressions\/#introduction-to-posix-regular-expressions\" target=\"_blank\" rel=\"noreferrer noopener\">POSIX regular expression<\/a> as a delimiter.<\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function:<\/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\">REGEXP_SPLIT_TO_ARRAY(source, pattern &#91;, flags])<\/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><strong>Parameters<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>source<\/code>: The input string you want to split.<\/li>\n\n\n\n<li><code>pattern<\/code>: A POSIX regular expression pattern you use as a delimiter.<\/li>\n\n\n\n<li><code>flags<\/code> <strong>(<\/strong><em>optional<\/em><strong>)<\/strong>: Modifiers that change how the regular expression matches the source string.<\/li>\n<\/ul>\n\n\n\n<p>The <code>REGEXP_SPLIT_TO_ARRAY<\/code> function returns an array of text, where each element represents a substring from the source string split by a POSIX regular expression.<\/p>\n\n\n\n<p>If there is no match, the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function does not split and returns an array containing the <code>source<\/code> string as an element.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='basic-postgresql-regexp_split_to_array-function-example'>Basic PostgreSQL REGEXP_SPLIT_TO_ARRAY Function Example <a href=\"#basic-postgresql-regexp_split_to_array-function-example\" class=\"anchor\" id=\"basic-postgresql-regexp_split_to_array-function-example\" title=\"Anchor for Basic PostgreSQL REGEXP_SPLIT_TO_ARRAY Function Example\">#<\/a><\/h2>\n\n\n\n<p>The following example splits a string using a comma (&#8220;,&#8221;) as the delimiter:<\/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  REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'SQL,Postgres,PostgreSQL'<\/span>, <span class=\"hljs-string\">','<\/span>) result;<\/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\/?q=U0VMRUNUIFJFR0VYUF9TUExJVF9UT19BUlJBWSgnU1FMLFBvc3RncmVzLFBvc3RncmVTUUwnLCAnLCcpIHJlc3VsdDs%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\">          result\n<span class=\"hljs-comment\">---------------------------<\/span>\n {<span class=\"hljs-keyword\">SQL<\/span>,Postgres,PostgreSQL}<\/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>If you need to transform an array into separate rows, you can combine the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function with the <code>UNNEST()<\/code> function:<\/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  UNNEST(\n    REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'SQL,Postgres,PostgreSQL'<\/span>, <span class=\"hljs-string\">','<\/span>)\n  ) result;<\/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\/?q=U0VMRUNUIFVOTkVTVCggUkVHRVhQX1NQTElUX1RPX0FSUkFZKCdTUUwsUG9zdGdyZXMsUG9zdGdyZVNRTCcsICcsJykgKSByZXN1bHQ7\" 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\">   result\n<span class=\"hljs-comment\">------------<\/span>\n <span class=\"hljs-keyword\">SQL<\/span>\n Postgres\n PostgreSQL<\/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>In this example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <code>REGEXP_SPLIT_TO_ARRAY<\/code> function splits the string into an array of substrings.<\/li>\n\n\n\n<li>The <code>UNNEST<\/code> function converts the array to separate rows.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='using-whitespace-as-a-delimiter'>Using Whitespace as a Delimiter <a href=\"#using-whitespace-as-a-delimiter\" class=\"anchor\" id=\"using-whitespace-as-a-delimiter\" title=\"Anchor for Using Whitespace as a Delimiter\">#<\/a><\/h2>\n\n\n\n<p>The following example splits a string based on whitespace characters using <code>\\s+<\/code> as the pattern:<\/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  REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'PostgreSQL Tutorial'<\/span>, <span class=\"hljs-string\">'\\s+'<\/span>) result;<\/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\/?q=U0VMRUNUIFJFR0VYUF9TUExJVF9UT19BUlJBWSgnUG9zdGdyZVNRTCBUdXRvcmlhbCcsICdccysnKSByZXN1bHQ7\" 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\">        result\n<span class=\"hljs-comment\">-----------------------<\/span>\n {PostgreSQL,Tutorial}<\/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, <code>\\s+<\/code> treats one or more spaces as a single delimiter, ensuring we don&#8217;t get an empty string in the resulting array.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='splitting-based-on-multiple-delimiters'>Splitting Based on Multiple Delimiters <a href=\"#splitting-based-on-multiple-delimiters\" class=\"anchor\" id=\"splitting-based-on-multiple-delimiters\" title=\"Anchor for Splitting Based on Multiple Delimiters\">#<\/a><\/h2>\n\n\n\n<p>The following example uses a pattern to split a string on multiple delimiters including commas (&#8220;,&#8221;), semicolons (&#8220;;&#8221;), and spaces (&#8221; &#8220;):<\/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  REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'SQL,Postgres;PostgreSQL'<\/span>, <span class=\"hljs-string\">'&#91;,; ]+'<\/span>) result;<\/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\/?q=U0VMRUNUIFJFR0VYUF9TUExJVF9UT19BUlJBWSgnU1FMLFBvc3RncmVzO1Bvc3RncmVTUUwnLCAnWyw7IF0rJykgcmVzdWx0Ow%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-9\" 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-keyword\">SQL<\/span>,Postgres,PostgreSQL}<\/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='handling-special-characters'>Handling Special Characters <a href=\"#handling-special-characters\" class=\"anchor\" id=\"handling-special-characters\" title=\"Anchor for Handling Special Characters\">#<\/a><\/h2>\n\n\n\n<p>If the input string contains special regex characters, you need to escape them properly. For example, to split a domain name (<code>www.pgtutorial.com<\/code>) using the dot (<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-keyword\">SELECT<\/span>\n  REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'www.pgtutorial.com'<\/span>, <span class=\"hljs-string\">'\\.'<\/span>) result;<\/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><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIFJFR0VYUF9TUExJVF9UT19BUlJBWSgnd3d3LnBndHV0b3JpYWwuY29tJywgJ1wuJykgcmVzdWx0Ow%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-11\" 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 {www,pgtutorial,com}<\/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>Since <code>.<\/code> is a special regex character, we escape it using double backslashes (<code>\\\\.<\/code>).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='handling-empty-elements'>Handling Empty Elements <a href=\"#handling-empty-elements\" class=\"anchor\" id=\"handling-empty-elements\" title=\"Anchor for Handling Empty Elements\">#<\/a><\/h2>\n\n\n\n<p>If the input string contains consecutive delimiters, the result will include empty elements:<\/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-keyword\">SELECT<\/span>\n  REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'SQL,Postgres,,PostgreSQL'<\/span>, <span class=\"hljs-string\">','<\/span>) result;<\/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<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?q=U0VMRUNUIFJFR0VYUF9TUExJVF9UT19BUlJBWSgnU1FMLFBvc3RncmVzLCxQb3N0Z3JlU1FMJywgJywnKSByZXN1bHQ7\" 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-13\" 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-keyword\">SQL<\/span>,Postgres,\"\",PostgreSQL}<\/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>To remove empty elements from the resulting array, use the <code>ARRAY_REMOVE()<\/code> function:<\/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  ARRAY_REMOVE(\n    REGEXP_SPLIT_TO_ARRAY(<span class=\"hljs-string\">'SQL,Postgres,,PostgreSQL'<\/span>, <span class=\"hljs-string\">','<\/span>),\n    <span class=\"hljs-string\">''<\/span>\n  ) result;<\/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\/?q=U0VMRUNUIEFSUkFZX1JFTU9WRSggUkVHRVhQX1NQTElUX1RPX0FSUkFZKCdTUUwsUG9zdGdyZXMsLFBvc3RncmVTUUwnLCAnLCcpLCAnJyApIHJlc3VsdDs%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-15\" 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-keyword\">SQL<\/span>,Postgres,PostgreSQL}<\/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='using-regexp_split_to_array-function-with-table-data'>Using REGEXP_SPLIT_TO_ARRAY Function with Table Data <a href=\"#using-regexp_split_to_array-function-with-table-data\" class=\"anchor\" id=\"using-regexp_split_to_array-function-with-table-data\" title=\"Anchor for Using REGEXP_SPLIT_TO_ARRAY Function with Table Data\">#<\/a><\/h2>\n\n\n\n<p>We&#8217;ll use the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function to split product names from the <code>products<\/code> table:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"159\" height=\"254\" src=\"https:\/\/www.pgtutorial.com\/wp-content\/uploads\/2024\/12\/products.png\" alt=\"PostgreSQL REGEXP_SPLIT_TO_ARRAY function: products table\" class=\"wp-image-1051\"\/><\/figure>\n\n\n\n<p>The following example uses the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function to split product names:<\/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\">SELECT<\/span>\n  product_name,\n  (REGEXP_SPLIT_TO_ARRAY(product_name, <span class=\"hljs-string\">'\\s+'<\/span>)) &#91;<span class=\"hljs-number\">2<\/span>] product_line\n<span class=\"hljs-keyword\">FROM<\/span>\n  products\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n  product_name;<\/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\/?q=U0VMRUNUIHByb2R1Y3RfbmFtZSwgKFJFR0VYUF9TUExJVF9UT19BUlJBWShwcm9kdWN0X25hbWUsICdccysnKSkgWzJdIHByb2R1Y3RfbGluZSBGUk9NIHByb2R1Y3RzIE9SREVSIEJZIHByb2R1Y3RfbmFtZTs%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-17\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\">        product_name        | product_line\n<span class=\"hljs-comment\">----------------------------+--------------<\/span>\n Apple AirPods Pro <span class=\"hljs-number\">3<\/span>        | AirPods\n Apple iMac <span class=\"hljs-number\">24<\/span>\"             | iMac\n Apple iPad Pro 12.9        | iPad\n Apple iPhone 15            | iPhone\n Apple iPhone 15 Pro Max    | iPhone\n Apple Watch Series 9       | Watch\n Bose SoundLink Max         | SoundLink\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<h2 class=\"wp-block-heading\" 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 the <code>REGEXP_SPLIT_TO_ARRAY<\/code> function to split a string into an array of text based on a POSIX regular expression as a delimiter.<\/li>\n\n\n\n<li>Use the <code>UNNEST()<\/code> function to convert arrays into rows.<\/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 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