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USE lastfm
/**
* Deletes all entries in badges
* for each unique username + type
* where more than one style or color exists
*/
DROP TABLE IF EXISTS tmp ;
CREATE TEMPORARY TABLE tmp (SELECT username, type, COUNT(username) AS count FROM badges GROUP BY username, type ) ;
SELECT badges.username, badges.type, badges.style, badges.color FROM badges, tmp WHERE badges.username = tmp.username AND badges.type = tmp.type AND tmp.count > 1 ;
DELETE badges FROM badges, tmp WHERE badges.username = tmp.username AND badges.type = tmp.type AND tmp.count > 1 ;
DROP TABLE tmp ;
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