So many that I can't remember a specific one.
However, for any serious query tuning and performance problem Visual Explain is absolutely VITAL!!!
So quick and easy to see ALL of the useful information, including query rewrite.
At one customer I have also used the Virtual Index add on which is also very useful.
At other customers I have to populate the virtual index DSN tables manually and then perform the explain, maybe this feature could be brought into the no-charge offering?
I don't mean the full index advisor just a GUI front-end to populate the VI DSN tables.
Ciao
Adrian??