Things (about MySQL) my father never told me...

Just discovered one of those things I should have discovered a long, long time ago: in MySQL (and, I assume, every-other-SQL), this:

insert into table (field1,field2,field3) values (1,2,3)
insert into table (field1,field2,field3) values (4,5,6)
insert into table (field1,field2,field3) values (7,8,9)

…can also be expressed like this:

insert into table (field1,field2,field3) values 
                  (1,2,3),
                  (4,5,6),
                  (7,8,9)

The difference is that the second form, especially if you’ve got lots of inserts to do, is much, much faster.