{"id":3397,"date":"2015-12-16T09:48:39","date_gmt":"2015-12-16T14:48:39","guid":{"rendered":"https:\/\/academy.sqlbak.com\/?p=3397"},"modified":"2023-10-17T05:11:40","modified_gmt":"2023-10-17T09:11:40","slug":"incorrect-syntax-near-the-keyword-primary-msg-156","status":"publish","type":"post","link":"https:\/\/academy.sqlbak.com\/incorrect-syntax-near-the-keyword-primary-msg-156\/","title":{"rendered":"Incorrect syntax near the keyword &#8216;PRIMARY&#8217; (Msg 156)"},"content":{"rendered":"<p>The error &#8220;<em>Incorrect syntax near the keyword &#8216;PRIMARY&#8217;<\/em>&#8221; can occur\u00a0if the user tries to execute the command with a\u00a0wrong\u00a0syntax. Let&#8217;s consider the following example:<\/p>\n<p>Assume there is a database &#8220;Adventureworks&#8221; in which new table &#8220;Table_2&#8221; was created. Two columns &#8220;Column1&#8221; and &#8220;Column2&#8221; were added to the &#8220;Table_2&#8221;, &#8220;Column1&#8221; was selected as Primary Key. Please pay attention to the following syntax:<\/p>\n<pre><span style=\"color: #0000ff;\">CREATE\u00a0TABLE<\/span> Table_2\r\n<span style=\"color: #999999;\">(<\/span>Column1<span style=\"color: #0000ff;\"> INT<\/span> <span style=\"color: #999999;\">NOT\u00a0NULL<\/span>,\r\nColumn2 <span style=\"color: #0000ff;\">VARCHAR<\/span><span style=\"color: #999999;\">(<\/span>300<span style=\"color: #999999;\">)<\/span>\r\n<span style=\"color: #0000ff;\">CONSTRAINT<\/span>\u00a0Table_2_Coumnl1 <span style=\"color: #0000ff;\">PRIMARY\u00a0KEY\u00a0CLUSTERED<\/span> <span style=\"color: #999999;\">(<\/span>Column1<span style=\"color: #999999;\">))<\/span><\/pre>\n<p><!--more--><\/p>\n<p>Then a decision was made to delete the primary key, the following command was executed:<\/p>\n<pre><span style=\"color: #0000ff;\">ALTER TABLE<\/span> Table_2\r\n<span style=\"color: #0000ff;\">DROP PRIMARY KEY<\/span><\/pre>\n<p>The next error was received:<\/p>\n<pre><span style=\"color: #ff0000;\">Msg 156, Level 15, State 1, Line 20<\/span>\r\n<span style=\"color: #ff0000;\">Incorrect syntax near the keyword 'PRIMARY'.<\/span><\/pre>\n<p>It happened because the wrong syntax was used to delete the primary key. &#8220;<span style=\"color: #0000ff;\">DROP PRIMARY KEY<\/span>&#8221; command is not suitable for SQL Server, it works with MySQL. To delete the primary key in SQL Server, use the following syntax:<\/p>\n<pre><span style=\"color: #0000ff;\">ALTER TABLE<\/span> Table_2\r\n<span style=\"color: #0000ff;\">DROP CONSTRAINT<\/span> Table_2_Column1<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>The error &#8220;Incorrect syntax near the keyword &#8216;PRIMARY&#8217;&#8221; can occur\u00a0if the user tries to execute the command with a\u00a0wrong\u00a0syntax. Let&#8217;s consider the following example: Assume there is a database &#8220;Adventureworks&#8221; in which new table &#8220;Table_2&#8221; was created. Two columns &#8220;Column1&#8221; and &#8220;Column2&#8221; were added to the &#8220;Table_2&#8221;, &#8220;Column1&#8221; was selected as Primary Key. Please pay [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[159],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Incorrect syntax near the keyword &#039;PRIMARY&#039; (Msg 156) - Sql Server Backup Academy<\/title>\n<meta name=\"description\" content=\"How to solve &quot;Incorrect syntax near the keyword &#039;PRIMARY&#039; (Msg 156)&quot;\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/academy.sqlbak.com\/incorrect-syntax-near-the-keyword-primary-msg-156\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Incorrect syntax near the keyword &#039;PRIMARY&#039; 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