I need online sql query syntax syntax. I searched the Internet but did not find anything good.
I also saw the links in this question:
Syntax check and validator for SQL?
http://sqlfiddle.com/ will allow you to test your queries, while it doesn’t explicitly fix the syntax, etc., in essence, it allows you to play with a script and will tell you if something works or no.
Many people, including me, use sqlfiddle.com to test SQL.