{"id":3491,"date":"2024-03-12T18:08:41","date_gmt":"2024-03-12T11:08:41","guid":{"rendered":"https:\/\/www.sqlservertutorial.net\/?page_id=3491"},"modified":"2024-03-12T20:21:59","modified_gmt":"2024-03-12T13:21:59","slug":"sql-server-json_query","status":"publish","type":"page","link":"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_query\/","title":{"rendered":"SQL Server JSON_QUERY() Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQL Server <code>JSON_QUERY()<\/code> function to extract an object or an array from a JSON string.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-sql-server-json_query-function'>Introduction to the SQL Server JSON_QUERY() function <a href=\"#introduction-to-the-sql-server-json_query-function\" class=\"anchor\" id=\"introduction-to-the-sql-server-json_query-function\" title=\"Anchor for Introduction to the SQL Server JSON_QUERY() function\">#<\/a><\/h2>\n\n\n\n<p>The <code>JSON_QUERY()<\/code> function allows you to extract a JSON object or a JSON array from a JSON string.<\/p>\n\n\n\n<p>Here&#8217;s the basic syntax of the <code>JSON_QUERY()<\/code> function:<\/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\">JSON_QUERY ( expression , path )<\/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>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>expression<\/code>: This is a JSON string, a variable that holds a JSON string, or a column that stores JSON data from which to extract the JSON array or JSON object.<\/li>\n\n\n\n<li><code>path<\/code>: This is the path to the JSON object or array that you want to extract. The <code>path<\/code> is optional, which defaults to <code>$<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>The <code>JSON_QUERY()<\/code> returns a JSON object or array as a character string. If the <code>path<\/code> is invalid, the <code>JSON_QUERY()<\/code> function returns an error.<\/p>\n\n\n\n<p class=\"note\">To extract a scalar value from a JSON string, you can use the <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_value\/\">JSON_VALUE()<\/a> function.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='sql-server-json_query-function-examples'>SQL Server JSON_QUERY() function examples <a href=\"#sql-server-json_query-function-examples\" class=\"anchor\" id=\"sql-server-json_query-function-examples\" title=\"Anchor for SQL Server JSON_QUERY() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the <code>JSON_QUERY()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-basic-json_query-function-examples'>1) Basic JSON_QUERY() function examples <a href=\"#1-basic-json_query-function-examples\" class=\"anchor\" id=\"1-basic-json_query-function-examples\" title=\"Anchor for 1) Basic JSON_QUERY() function examples\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>JSON_QUERY()<\/code> function to extract the JSON object <code>spec<\/code> from a JSON string:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n  JSON_QUERY(\n    <span class=\"hljs-string\">'{\"name\": \"Tablet\", \"spec\": {\"weight\": \"1.07 pounds\", \"display\": \"10.2-inch\", \"bands\": &#91;, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 29, 30, 34, 38, 39, 40, 41, 66, 71]}}'<\/span>, \n    <span class=\"hljs-string\">'$.spec'<\/span>\n  ) <span class=\"hljs-keyword\">AS<\/span> spec;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><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>Output:<\/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\">spec\n\n<span class=\"hljs-comment\">-----------------------------------------------------------------------------------------------------------------------------------------------------------------<\/span>\n{\"weight\": \"1.07 pounds\", \"display\": \"10.2-inch\", \"bands\": &#91;1, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 29, 30, 34, 38, 39, 40, 41, 66, 71]}<\/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>The following example uses the <code>JSON_QUERY()<\/code> function to extract the JSON array <code>bands<\/code> from the product JSON string:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" 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  JSON_QUERY(\n    <span class=\"hljs-string\">'{\"name\": \"Tablet\", \"spec\": {\"weight\": \"1.07 pounds\", \"display\": \"10.2-inch\", \"bands\": &#91;1, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 29, 30, 34, 38, 39, 40, 41, 66, 71]}}'<\/span>, \n    <span class=\"hljs-string\">'$.spec.bands'<\/span>\n  ) <span class=\"hljs-keyword\">AS<\/span> bands;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><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>Output:<\/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\">bands\n<span class=\"hljs-comment\">-----------------------------------------------------------------------------------------------------<\/span>\n&#91;1, 2, 3, 4, 5, 7, 8, 11, 12, 13, 14, 17, 18, 19, 20, 21, 25, 26, 29, 30, 34, 38, 39, 40, 41, 66, 71]<\/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<h3 class=\"wp-block-heading\" id='2-using-sql-server-json_query-function-with-table-data-example'>2) Using SQL Server JSON_QUERY() function with table data example <a href=\"#2-using-sql-server-json_query-function-with-table-data-example\" class=\"anchor\" id=\"2-using-sql-server-json_query-function-with-table-data-example\" title=\"Anchor for 2) Using SQL Server JSON_QUERY() function with table data example\">#<\/a><\/h3>\n\n\n\n<p>First, <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-create-table\/\">create a new table<\/a> called <code>Products<\/code>:<\/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\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> Products (\n    ProductID <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">IDENTITY<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    ProductDetails <span class=\"hljs-keyword\">NVARCHAR<\/span>(<span class=\"hljs-keyword\">MAX<\/span>)\n);<\/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>The <code>Products<\/code> table has two columns <code>ProductID<\/code> and <code>ProductDetails<\/code>. The <code>ProductDetails<\/code> column will store JSON data.<\/p>\n\n\n\n<p>Second, <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-insert-multiple-rows\/\">insert three rows<\/a> into the <code>Products<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span> Products \n<span class=\"hljs-keyword\">VALUES<\/span> \n(<span class=\"hljs-string\">'{\"name\": \"Laptop\", \"price\": 999.99, \"specs\": {\"processor\": \"Intel i7\", \"RAM\": \"16GB\", \"storage\": \"512GB SSD\"}}'<\/span>),\n(<span class=\"hljs-string\">'{\"name\": \"Smartphone\", \"price\": 699.99, \"colors\": &#91;\"Black\", \"White\", \"Blue\"]}'<\/span>),\n(<span class=\"hljs-string\">'{\"name\": \"Headphones\", \"price\": 129.99, \"features\": &#91;\"Noise-cancellation\", \"Wireless\", \"Long battery life\"]}'<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><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>Third, extract the <code>specs<\/code> object from the <code>ProductDetails<\/code> JSON using the <code>JSON_QUERY()<\/code> function:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" 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> ProductID, \n       JSON_QUERY(ProductDetails, <span class=\"hljs-string\">'$.specs'<\/span>) <span class=\"hljs-keyword\">AS<\/span> Specs\n<span class=\"hljs-keyword\">FROM<\/span> Products;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><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>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">ProductID | Specs\n<span class=\"hljs-comment\">--------------------------------------------------------------------------<\/span>\n1         | {\"processor\": \"Intel i7\", \"RAM\": \"16GB\", \"storage\": \"512GB SSD\"}\n2         | NULL\n3         | NULL\n(3 rows)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><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>In this example, we use the JSON path <code>'$.specs'<\/code> that locates the <code>specs<\/code> key in the JSON string. The function returns a JSON object.<\/p>\n\n\n\n<p>Finally, extract the <code>colors<\/code> array from the <code>ProductDetails<\/code> JSON:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> ProductID, \n       JSON_QUERY(ProductDetails, <span class=\"hljs-string\">'$.colors'<\/span>) <span class=\"hljs-keyword\">AS<\/span> Colors\n<span class=\"hljs-keyword\">FROM<\/span> Products;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><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>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">ProductID | Colors\n<span class=\"hljs-comment\">------------------------------------<\/span>\n1         | NULL\n2         | &#91;\"Black\", \"White\", \"Blue\"]\n3         | NULL\n(3 rows)<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><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>In this example, we use the JSON path <code>'$.colors'<\/code> to reference the <code>colors<\/code> array of the <code>ProductDetails<\/code> JSON object.<\/p>\n\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 SQL Server <code>JSON_QUERY()<\/code> function to extract an object or an array from a JSON string.<\/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=\"3491\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_query\/\"\n\t\t\t\tdata-post-title=\"SQL Server JSON_QUERY() 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 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full h-full\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M14 9V5a3 3 0 0 0-3-3l-4 9v11h11.28a2 2 0 0 0 2-1.7l1.38-9a2 2 0 0 0-2-2.3zM7 22H4a2 2 0 0 1-2-2v-7a2 2 0 0 1 2-2h3\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> Yes <\/span>\n\t\t\t<\/button>\n\n\t\t\t<button\n\t\t\t\tdata-response=\"0\"\n\t\t\t\tdata-post=\"3491\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_query\/\"\n\t\t\t\tdata-post-title=\"SQL Server JSON_QUERY() Function\"\n\t\t\t\tclass=\"wth-btn-rounded wth-no-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 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t>\n\t\t\t\t\t<path\n\t\t\t\t\t\td=\"M10 15v4a3 3 0 0 0 3 3l4-9V2H5.72a2 2 0 0 0-2 1.7l-1.38 9a2 2 0 0 0 2 2.3zm7-13h2.67A2.31 2.31 0 0 1 22 4v7a2.31 2.31 0 0 1-2.33 2H17\"\n\t\t\t\t\t><\/path>\n\t\t\t\t<\/svg>\n\t\t\t\t<span class=\"sr-only\"> No <\/span>\n\t\t\t<\/button>\n\t\t<\/div>\n\t<\/header>\n\n\t<div class=\"wth-form hidden\">\n\t\t<div class=\"wth-form-wrapper\">\n\t\t\t<div class=\"wth-title\"><\/div>\n\t\t\t\n\t\t\t<textarea class=\"wth-message\"><\/textarea>\n\n\t\t\t<button class=\"btn btn-primary wth-btn-submit\">Send<\/button>\n\t\t\t<button class=\"btn wth-btn-cancel\">Cancel<\/button>\n\t\t\n\t\t<\/div>\n\t<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Summary: in this tutorial, you will learn how to use the SQL Server JSON_QUERY() function to extract an object or an array from a JSON string. Introduction to the SQL Server JSON_QUERY() function # The JSON_QUERY() function allows you to extract a JSON object or a JSON array from a JSON string. Here&#8217;s the basic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3480,"menu_order":6,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3491","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>SQL Server JSON_QUERY() Function<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the SQL Server JSON_QUERY() function to extract an object or an array from a JSON string.\" \/>\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.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_query\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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