Is case relevant in SQL commands?

Soviero asked:

MySQL 5.5 on Ubuntu 12.04.1

I know that the databases, users, tables, etc. are case-sensitive (at least on Linux). But what about the commands themselves?

For example, compare:

SELECT *  FROM `PINs` WHERE `pin` > 1000


select * from `PINs` where `pin` > 1000

I know both “work,” but are there any down-sides to using lower-case commands?

My answer:

MySQL commands are not case sensitive. However, many people capitalize them anyway to make them visually distinct from other parts of the query.

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