Are there any published coding style guidelines for SQL?

Question

Often I will end up with very complex SQL statements and I wondered if there was style guideline out there that dictates a common way of laying various aspects of a query out.

Answer 1

MySQL has a short description of their more or less strict rules:

https://dev.mysql.com/doc/internals/en/coding-style.html

Most common codingstyle for MySQL by Simon Holywell:

http://www.sqlstyle.guide/

See also this question: Is there a naming convention for MySQL?