One of the tools we use to qualify MySQL Server is the Random Query Generator (RQG for short). This is an SQL generator (and more) to test database systems such as MySQL. I plan to post more on that later.
The RQG is an open source tool written in Perl, and is available on Launchpad. Up until now the RQG documentation has been part of the MySQL Forge wiki. As you may have seen from this blog post, MySQL Forge is going away soon (August 1st). Unlike other parts of the Forge wiki, the Random Query Generator documentation has moved to github, and will continue to be maintained by the RQG community:
The RQG docs is a great starting point for getting to know the Random Query Generator and its capabilities.