{"id":12054,"date":"2022-03-15T18:09:51","date_gmt":"2022-03-15T22:09:51","guid":{"rendered":"http:\/\/local.brightwhiz\/?post_type=snippets&#038;p=12054"},"modified":"2022-03-15T18:09:53","modified_gmt":"2022-03-15T22:09:53","slug":"add-primary-key-to-existing-table-sql","status":"publish","type":"snippets","link":"http:\/\/local.brightwhiz\/snippets\/add-primary-key-to-existing-table-sql\/","title":{"rendered":"Add Primary Key to Existing Table SQL"},"content":{"rendered":"\n<p>Code to add a primary key to existing table SQL.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-sql\">ALTER TABLE table_name ADD PRIMARY KEY ( the_id, the_name, PMID );<\/code><\/pre>\n\n\n\n<p>Syntax.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-sql\">ALTER TABLE &lt;Table_Name&gt; DROP CONSTRAINT &lt;constraint_name&gt;;\n\nALTER TABLE &lt;Table_Name&gt; ADD CONSTRAINT &lt;constraint_name&gt; PRIMARY KEY ( &lt;Column1&gt;, &lt;Column2&gt; )<\/code><\/pre>\n\n\n\n<p>Live example.<\/p>\n\n\n\n<pre class=\"wp-block-prismatic-blocks\"><code class=\"language-sql\">ALTER TABLE table_name ADD PRIMARY KEY ( id );<\/code><\/pre>\n","protected":false},"comment_status":"open","ping_status":"closed","template":"","meta":[],"categories":[953,27,15,16,18],"tags":[177,180,350,424,449,549,591],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Add Primary Key to Existing Table SQL [Snippet]<\/title>\n<meta name=\"description\" content=\"Check out these SQL code snippets for your project showing how to add a primary key to existing table SQL\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/local.brightwhiz\/snippets\/add-primary-key-to-existing-table-sql\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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