{"id":3509,"date":"2024-03-13T06:02:48","date_gmt":"2024-03-12T23:02:48","guid":{"rendered":"https:\/\/www.sqlservertutorial.net\/?page_id=3509"},"modified":"2024-03-13T11:01:44","modified_gmt":"2024-03-13T04:01:44","slug":"sql-server-json_object","status":"publish","type":"page","link":"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_object\/","title":{"rendered":"SQL Server JSON_OBJECT() Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQL Server <code>JSON_OBJECT()<\/code> function to create a string that contains a JSON object from a list of key\/value pairs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-sql-server-json_object-function'>Introduction to the SQL Server JSON_OBJECT() function <a href=\"#introduction-to-the-sql-server-json_object-function\" class=\"anchor\" id=\"introduction-to-the-sql-server-json_object-function\" title=\"Anchor for Introduction to the SQL Server JSON_OBJECT() function\">#<\/a><\/h2>\n\n\n\n<p>The <code>JSON_OBJECT()<\/code> creates a <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-json\/\">JSON<\/a> object string from a list of key\/value pairs. <\/p>\n\n\n\n<p>Here&#8217;s the basic syntax of the <code>JSON_OBJECT()<\/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_OBJECT(key1:value1 &#91;json_null_clause], key2:value2 &#91;json_null_clause], ...)<\/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>key1:value1<\/code>, <code>key2:value2<\/code>&#8230; are key values of the result JSON object.<\/li>\n\n\n\n<li><code>json_null_clause<\/code> option determines how the <code>JSON_OBJECT<\/code> function works when the <code>value1<\/code>, <code>value2<\/code>, and so on is <code>NULL<\/code>. <\/li>\n<\/ul>\n\n\n\n<p>The <code>json_Null_clause<\/code> accepts <code>NULL<\/code> <code>ON<\/code> <code>NULL<\/code> or <code>ABSENT<\/code> <code>ON<\/code> <code>NULL<\/code>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>NULL ON NULL<\/code>: The <code>JS<code>ON<\/code>_OBECT()<\/code> function converts <code>NULL<\/code> in SQL into a JSON <code>null<\/code> value when generating the JSON value.<\/li>\n\n\n\n<li><code>ABSENT ON NULL<\/code>: <code>THe<\/code> <code>JS<code>ON<\/code>_OBJECT()<\/code> function omits the entire key if the value is <code>NULL<\/code>.<\/li>\n<\/ul>\n\n\n\n<p>By default, the <code>json_Null_clause<\/code> is <code>NULL<\/code> on <code>NULL<\/code>.<\/p>\n\n\n\n<p>The <code>JSON_OBJECT()<\/code> function returns a valid JSON object with the type <code>NVARCHAR(MAX)<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='sql-server-json_object-function-examples'>SQL Server JSON_OBJECT() function examples <a href=\"#sql-server-json_object-function-examples\" class=\"anchor\" id=\"sql-server-json_object-function-examples\" title=\"Anchor for SQL Server JSON_OBJECT() function examples\">#<\/a><\/h2>\n\n\n\n<p>Let&#8217;s take some examples of using the <code>JSON_OBJECT()<\/code> function.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='1-basic-json_object-function-examples'>1) Basic JSON_OBJECT() function examples <a href=\"#1-basic-json_object-function-examples\" class=\"anchor\" id=\"1-basic-json_object-function-examples\" title=\"Anchor for 1) Basic JSON_OBJECT() function examples\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>JSON_OBJECT()<\/code> function to create an empty JSON object:<\/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> JSON_OBJECT() <span class=\"hljs-keyword\">result<\/span>;<\/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\">result\n<span class=\"hljs-comment\">------<\/span>\n{}<\/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_OBJECT()<\/code> function to create a JSON object with three key\/value pairs:<\/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_OBJECT(\n    <span class=\"hljs-string\">'name'<\/span> : <span class=\"hljs-string\">'John'<\/span>, <span class=\"hljs-string\">'age'<\/span> : <span class=\"hljs-number\">22<\/span>, <span class=\"hljs-string\">'job'<\/span> : <span class=\"hljs-string\">'DBA'<\/span>\n  ) employee;<\/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\">employee\n<span class=\"hljs-comment\">------------------------------------<\/span>\n{\"name\":\"John\",\"age\":22,\"job\":\"DBA\"}<\/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-the-json_object-function-with-null'>2) Using the JSON_OBJECT() function with NULL <a href=\"#2-using-the-json_object-function-with-null\" class=\"anchor\" id=\"2-using-the-json_object-function-with-null\" title=\"Anchor for 2) Using the JSON_OBJECT() function with NULL\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>JSON_OBJECT()<\/code> function to create an object from values that contain <code>NULL<\/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\">SELECT<\/span> \n  JSON_OBJECT(\n    <span class=\"hljs-string\">'name'<\/span> : <span class=\"hljs-string\">'John'<\/span>, <span class=\"hljs-string\">'age'<\/span> : <span class=\"hljs-number\">22<\/span>, <span class=\"hljs-string\">'job'<\/span> : <span class=\"hljs-literal\">NULL<\/span>\n  ) employee;<\/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>Output:<\/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\">employee\n<span class=\"hljs-comment\">-----------------------------------<\/span>\n{\"name\":\"John\",\"age\":22,\"job\":null}<\/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>In this example, the value of the <code>job<\/code> key is <code>NULL<\/code>. Therefore, the <code>JS<code>ON<\/code>_OBJECT()<\/code> function converts it into a JSON <code>null<\/code> value.<\/p>\n\n\n\n<p>To omit the key\/value where the value is <code>NULL<\/code>, you can explicitly use the <code>ABSENT<\/code> <code>ON<\/code> <code>NULL<\/code> option:<\/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> \n  JSON_OBJECT(\n    <span class=\"hljs-string\">'name'<\/span> : <span class=\"hljs-string\">'John'<\/span>, <span class=\"hljs-string\">'age'<\/span> : <span class=\"hljs-number\">22<\/span>, <span class=\"hljs-string\">'job'<\/span> : <span class=\"hljs-literal\">NULL<\/span> ABSENT <span class=\"hljs-keyword\">ON<\/span> <span class=\"hljs-literal\">NULL<\/span>\n  ) employee;<\/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\">employee\n<span class=\"hljs-comment\">------------------------<\/span>\n{\"name\":\"John\",\"age\":22}<\/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<h3 class=\"wp-block-heading\" id='4-using-the-json_object-function-to-create-a-complex-json-object'>4) Using the JSON_OBJECT() function to create a complex JSON object <a href=\"#4-using-the-json_object-function-to-create-a-complex-json-object\" class=\"anchor\" id=\"4-using-the-json_object-function-to-create-a-complex-json-object\" title=\"Anchor for 4) Using the JSON_OBJECT() function to create a complex JSON object\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the <code>JSON_OBJECT()<\/code> function that creates a JSON object nested in another JSON object:<\/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> \n  JSON_OBJECT(\n    <span class=\"hljs-string\">'name'<\/span> : <span class=\"hljs-string\">'John'<\/span>, \n    <span class=\"hljs-string\">'job'<\/span> : JSON_OBJECT(<span class=\"hljs-string\">'title'<\/span> : <span class=\"hljs-string\">'DBA'<\/span>, <span class=\"hljs-string\">'grade'<\/span> : <span class=\"hljs-string\">'P3'<\/span>)\n  ) employee;<\/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\">employee\n<span class=\"hljs-comment\">--------------------------------------------------<\/span>\n{\"name\":\"John\",\"job\":{\"title\":\"DBA\",\"grade\":\"P3\"}}<\/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<h3 class=\"wp-block-heading\" id='5-using-the-json_object-function-with-json_array-function'>5) Using the JSON_OBJECT() function with JSON_ARRAY() function <a href=\"#5-using-the-json_object-function-with-json_array-function\" class=\"anchor\" id=\"5-using-the-json_object-function-with-json_array-function\" title=\"Anchor for 5) Using the JSON_OBJECT() function with JSON_ARRAY() function\">#<\/a><\/h3>\n\n\n\n<p>The following example constructs a JSON object with three keys, one key contains a JSON string, another key contains a JSON object, and another key contains a JSON array:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" 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_OBJECT(\n    <span class=\"hljs-string\">'name'<\/span> : <span class=\"hljs-string\">'John'<\/span>, \n    <span class=\"hljs-string\">'job'<\/span> : JSON_OBJECT(<span class=\"hljs-string\">'title'<\/span> : <span class=\"hljs-string\">'DBA'<\/span>, <span class=\"hljs-string\">'grade'<\/span> : <span class=\"hljs-string\">'P3'<\/span>), \n    <span class=\"hljs-string\">'skills'<\/span> : JSON_ARRAY(\n      <span class=\"hljs-string\">'SQL'<\/span>, <span class=\"hljs-string\">'Linux'<\/span>, <span class=\"hljs-string\">'Backup &amp; recovery'<\/span>\n    )\n  ) employee;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><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-13\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">employee\n<span class=\"hljs-comment\">-----------------------------------------------------------------------------------------------<\/span>\n{\"name\":\"John\",\"job\":{\"title\":\"DBA\",\"grade\":\"P3\"},\"skills\":&#91;\"SQL\",\"Linux\",\"<span class=\"hljs-keyword\">Backup<\/span> &amp; <span class=\"hljs-keyword\">recovery<\/span><span class=\"hljs-string\">\"]}<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><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 <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-json-functions\/sql-server-json_array\/\">JSON_ARRAY()<\/a> function to construct a JSON array from values.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id='6-using-the-json_object-function-with-table-data'>6) Using the JSON_OBJECT() function with table data <a href=\"#6-using-the-json_object-function-with-table-data\" class=\"anchor\" id=\"6-using-the-json_object-function-with-table-data\" title=\"Anchor for 6) Using the JSON_OBJECT() function with table data\">#<\/a><\/h3>\n\n\n\n<p>We&#8217;ll use the <code>production.products<\/code> table from the <a href=\"https:\/\/www.sqlservertutorial.net\/getting-started\/sql-server-sample-database\/\">sample database<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"206\" height=\"169\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/products.png\" alt=\"products\" class=\"wp-image-147\"\/><\/figure>\n\n\n\n<p>The following example uses the <code>JSON_OBJECT()<\/code> function to create a JSON object for each row in the <code>production.products<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" 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_OBJECT(\n    <span class=\"hljs-string\">'product_id'<\/span> : product_id, <span class=\"hljs-string\">'product_name'<\/span> : product_name, \n    <span class=\"hljs-string\">'model_year'<\/span> : model_year, <span class=\"hljs-string\">'list_price'<\/span> : list_price\n  ) product \n<span class=\"hljs-keyword\">FROM<\/span> \n  production.products;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><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-15\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">product\n<span class=\"hljs-comment\">----------------------------------------------------------------------------------------------------------<\/span>\n{\"product_id\":1,\"product_name\":\"Trek 820 - 2016\",\"model_year\":2016,\"list_price\":379.99}\n{\"product_id\":2,\"product_name\":\"Ritchey Timberwolf Frameset - 2016\",\"model_year\":2016,\"list_price\":749.99}\n{\"product_id\":3,\"product_name\":\"Surly Wednesday Frameset - 2016\",\"model_year\":2016,\"list_price\":999.99}\n...<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-15\"><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<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>JSON_OBJECT()<\/code> function to construct a JSON object string from a list of key\/value pairs.<\/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 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