Recommend an Oracle query optimisation book or course

Can anyone recommend a book on oracle query optimisation and/or recommend a course?

Bit of background:

This year's task is to optimisation a few oracle SQL reports - ok may be a couple of hundred.

I can see obvious optimisations, but there are some reports that are slow and I need to work out it that are just slow or if it is the 'query execution plan' for them than is none to clever. So I need to understand oracle's EXPLAIN PLAN output.

Currently using oracle 8 but will be moving to 9 or 10 later this year it that makes any difference.

Thanks

all the 9i docs..

http://www.oracle.com/technology/doc...ion/index.html

and the how to use EXPLAIN PLAN bit:

http://download-uk.oracle.com/docs/c...n.htm#PFGRF009

these are all for 9i release 2 which is the earliest version of Orable that you should be using in a production enviroment imho. (even though we are still using 7.3.3 and 8.1.7 )

shout of you have any questions not answered in the docs

Paul