{"id":12112,"date":"2023-11-06T02:51:12","date_gmt":"2023-11-06T09:51:12","guid":{"rendered":"https:\/\/www.mysqltutorial.org\/?page_id=12112"},"modified":"2023-11-06T02:51:20","modified_gmt":"2023-11-06T09:51:20","slug":"mysql-json_merge_preserve","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/","title":{"rendered":"MySQL JSON_MERGE_PRESERVE() Function"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the MySQL <code>JSON_MERGE_PRESERVE()<\/code> function to merge two or more JSON documents.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to MySQL JSON_MERGE_PRESERVE() function<\/h2>\n\n\n\n<p>The <code>JSON_MERGE_PRESERVE()<\/code> function merges two or more JSON documents and returns a merged JSON document while preserving the structure of the original JSON document.<\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>JSON_MERGE_PRESERVE()<\/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_MERGE_PRESERVE(json_doc, json_doc&#91;, json_doc] ...)<\/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>json_doc<\/code>: This is the JSON document that you want to merge. The function accepts two or more <code>json_doc<\/code> arguments.<\/li>\n<\/ul>\n\n\n\n<p>The function returns a merged JSON document. It returns <code>NULL<\/code> if any argument is <code>NULL<\/code>.<\/p>\n\n\n\n<p>If any argument is not a valid JSON document, the function raises an error.<\/p>\n\n\n\n<p>The function uses the following rules for merging JSON documents while preserving the structure of the original JSON document:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adjacent arrays are merged into a single array.<\/li>\n\n\n\n<li>Adjacent objects are merged into a single object.<\/li>\n\n\n\n<li>A scalar value is automatically wrapped as an array and merged as an array.<\/li>\n\n\n\n<li>Adjacent arrays and objects are merged by automatically wrapping the object as an array and then merging the two arrays.<\/li>\n<\/ul>\n\n\n\n<p class=\"note\">To merge two or more JSON documents into a JSON document while discarding duplicate keys, you use the <a href=\"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_patch\/\">JSON_MERGE_PATCH()<\/a> function.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL JSON_MERGE_PRESERVE() function examples<\/h2>\n\n\n\n<p>Let&#8217;s look at some examples to understand how <code>JSON_MERGE_PRESERVE()<\/code> works.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Merging arrays into a single array<\/h3>\n\n\n\n<p>The following example uses the <code>JSON_MERGE_PRESERVE()<\/code> function to merge two arrays into a single array:<\/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_MERGE_PRESERVE(<span class=\"hljs-string\">'&#91;1, 2]'<\/span>, <span class=\"hljs-string\">'&#91;3, 4]'<\/span>) <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\">+<span class=\"hljs-comment\">--------------+<\/span>\n| result       |\n+<span class=\"hljs-comment\">--------------+<\/span>\n| &#91;1, 2, 3, 4] |\n+<span class=\"hljs-comment\">--------------+<\/span>\n1 row in <span class=\"hljs-keyword\">set<\/span> (<span class=\"hljs-number\">0.00<\/span> sec)<\/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<h3 class=\"wp-block-heading\">2) Merging objects into a single object<\/h3>\n\n\n\n<p>The following example uses the <code>JSON_MERGE_PRESERVE()<\/code> function to merge two objects into a single object:<\/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_MERGE_PRESERVE(<span class=\"hljs-string\">'{\"name\": \"John Doe\"}'<\/span>, <span class=\"hljs-string\">'{\"age\": 25}'<\/span>) <span class=\"hljs-keyword\">result<\/span>;<\/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\">+<span class=\"hljs-comment\">---------------------------------+<\/span>\n| result                          |\n+<span class=\"hljs-comment\">---------------------------------+<\/span>\n| {\"age\": 25, \"name\": \"John Doe\"} |\n+<span class=\"hljs-comment\">---------------------------------+<\/span>\n1 row in <span class=\"hljs-keyword\">set<\/span> (<span class=\"hljs-number\">0.00<\/span> sec)<\/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\">3) Merging scalars into an array<\/h3>\n\n\n\n<p>The following example uses the <code>JSON_MERGE_PRESERVE()<\/code> function to merge two scalar values into an array whose elements are the scalar values:<\/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_MERGE_PRESERVE(<span class=\"hljs-string\">'1'<\/span>, <span class=\"hljs-string\">'true'<\/span>) <span class=\"hljs-keyword\">result<\/span>;<\/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\">+<span class=\"hljs-comment\">-----------+<\/span>\n| result    |\n+<span class=\"hljs-comment\">-----------+<\/span>\n| &#91;1, true] |\n+<span class=\"hljs-comment\">-----------+<\/span>\n1 row in <span class=\"hljs-keyword\">set<\/span> (<span class=\"hljs-number\">0.00<\/span> sec)<\/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<h3 class=\"wp-block-heading\">4) Merging an arrays and an object into an array<\/h3>\n\n\n\n<p>The following example uses the <code>JSON_MERGE_PRESERVE()<\/code> function to merge an array with an object and return an array that contains the object as the last element:<\/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_MERGE_PRESERVE(\n    <span class=\"hljs-string\">'&#91;\"Jane\", \"John\"]'<\/span>, <span class=\"hljs-string\">'{\"name\": \"Alice\"}'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/span>;<\/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\">+<span class=\"hljs-comment\">-------------------------------------+<\/span>\n| result                              |\n+<span class=\"hljs-comment\">-------------------------------------+<\/span>\n| &#91;\"Jane\", \"John\", {\"name\": \"Alice\"}] |\n+<span class=\"hljs-comment\">-------------------------------------+<\/span>\n1 row in <span class=\"hljs-keyword\">set<\/span> (<span class=\"hljs-number\">0.00<\/span> sec)<\/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\">5) Merging objects with the same keys<\/h3>\n\n\n\n<p>The following example uses the <code>JSON_MERGE_PRESERVE()<\/code> function to merge two objects with the same key and return an object with the values are the arrays containing the values of each 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_MERGE_PRESERVE(\n    <span class=\"hljs-string\">'{ \"name\": \"Jane Doe\", \"age\": 24 }'<\/span>, \n    <span class=\"hljs-string\">'{ \"name\": \"Jane Smith\", \"age\": 25 }'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/span>;<\/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\">+<span class=\"hljs-comment\">-------------------------------------------------------+<\/span>\n| result                                                |\n+<span class=\"hljs-comment\">-------------------------------------------------------+<\/span>\n| {\"age\": &#91;24, 25], \"name\": &#91;\"Jane Doe\", \"Jane Smith\"]} |\n+<span class=\"hljs-comment\">-------------------------------------------------------+<\/span>\n1 row in <span class=\"hljs-keyword\">set<\/span> (<span class=\"hljs-number\">0.00<\/span> sec)<\/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<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>JSON_MERGE_PRESERVE()<\/code> function to merge two or more JSON documents while preserving the structure of the original JSON document.<\/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=\"12112\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/\"\n\t\t\t\tdata-post-title=\"MySQL JSON_MERGE_PRESERVE() 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=\"12112\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/\"\n\t\t\t\tdata-post-title=\"MySQL JSON_MERGE_PRESERVE() 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>In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":11973,"menu_order":14,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-12112","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 JSON_MERGE_PRESERVE() Function<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.\" \/>\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-json\/mysql-json_merge_preserve\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL JSON_MERGE_PRESERVE() Function\" \/>\n<meta property=\"og:description\" content=\"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/\" \/>\n<meta property=\"og:site_name\" content=\"MySQL Tutorial\" \/>\n<meta property=\"article:modified_time\" content=\"2023-11-06T09:51:20+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/mysql-json_merge_preserve\\\/\",\"url\":\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/mysql-json_merge_preserve\\\/\",\"name\":\"MySQL JSON_MERGE_PRESERVE() Function\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mysqltutorial.org\\\/#website\"},\"datePublished\":\"2023-11-06T09:51:12+00:00\",\"dateModified\":\"2023-11-06T09:51:20+00:00\",\"description\":\"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/mysql-json_merge_preserve\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/mysql-json_merge_preserve\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/mysql-json_merge_preserve\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.mysqltutorial.org\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"MySQL JSON\",\"item\":\"https:\\\/\\\/www.mysqltutorial.org\\\/mysql-json\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"MySQL JSON_MERGE_PRESERVE() Function\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.mysqltutorial.org\\\/#website\",\"url\":\"https:\\\/\\\/www.mysqltutorial.org\\\/\",\"name\":\"MySQL Tutorial\",\"description\":\"A comprehensive MySQL Tutorial\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.mysqltutorial.org\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"MySQL JSON_MERGE_PRESERVE() Function","description":"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/","og_locale":"en_US","og_type":"article","og_title":"MySQL JSON_MERGE_PRESERVE() Function","og_description":"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.","og_url":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/","og_site_name":"MySQL Tutorial","article_modified_time":"2023-11-06T09:51:20+00:00","twitter_misc":{"Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/","url":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/","name":"MySQL JSON_MERGE_PRESERVE() Function","isPartOf":{"@id":"https:\/\/www.mysqltutorial.org\/#website"},"datePublished":"2023-11-06T09:51:12+00:00","dateModified":"2023-11-06T09:51:20+00:00","description":"In this tutorial, you will learn how to use the MySQL JSON_MERGE_PRESERVE() function to merge two or more JSON documents.","breadcrumb":{"@id":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.mysqltutorial.org\/mysql-json\/mysql-json_merge_preserve\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.mysqltutorial.org\/"},{"@type":"ListItem","position":2,"name":"MySQL JSON","item":"https:\/\/www.mysqltutorial.org\/mysql-json\/"},{"@type":"ListItem","position":3,"name":"MySQL JSON_MERGE_PRESERVE() Function"}]},{"@type":"WebSite","@id":"https:\/\/www.mysqltutorial.org\/#website","url":"https:\/\/www.mysqltutorial.org\/","name":"MySQL Tutorial","description":"A comprehensive MySQL Tutorial","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.mysqltutorial.org\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/pages\/12112","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/comments?post=12112"}],"version-history":[{"count":3,"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/pages\/12112\/revisions"}],"predecessor-version":[{"id":12115,"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/pages\/12112\/revisions\/12115"}],"up":[{"embeddable":true,"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/pages\/11973"}],"wp:attachment":[{"href":"https:\/\/www.mysqltutorial.org\/wp-json\/wp\/v2\/media?parent=12112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}