Here’s a sneak peek at a video matrix — this is all the videos that include Pythian Group employees at the MySQL conference. I hope to have all the rest of the videos processed and uploaded within 24 hours, with a matrix similar to the one below (but of course with many more sessions).
TitlePresenterSlidesVideo [...]

So, something else I learned recently...

Say you have a table T:

ops$tkyte%ORA10GR2> create table t ( x int );
Table created.
ops$tkyte%ORA10GR2> insert into t values ( 1 );
1 row created.
ops$tkyte%ORA10GR2> commit;
Commit complete.

and you update a row in that table:

ops$tkyte%ORA10GR2> update t set x = x+1;
1 row updated.

and using an evil autonomous transaction you try to lock that row (in the same session, but a new transaction - one that cannot 'see' the effects of the parent transaction)