|Enlightened||First to answer and accepted with score of 10 or more. This badge can be awarded multiple times.|
David Spillett earned this badge 5 times
jun 24 '11 at 18:02When should I use a unique constraint instead of a unique index?
may 15 '11 at 10:47Is "CREATE INDEX` in MySQL a Linear Operation?
jan 14 '11 at 6:16NULL or NOT NULL by default?