« Previous 1 2 3 ... 100 Next »
Notice that A,C does not use 2 bytes of the index making the lookup scan the result set of A, since A,C doesn't follow left-most in the compound index C comes after B ;)) link »
http:/
http:/
entries tables comes first and as you sort by column from this table it allows to avoid temporary table. When you sort by second table in join it requires temporary table. link »
userid,entryId index on entries you would get rid of filesort too. link »
http:/
http:/

http:/
http:/
http:/

def autoload_missing_constants link »
http:/