a mozes i nesto ovako:
Kôd:
CREATE TEMPORARY TABLE `bla`
SELECT * FROM `postparsed` GROUP BY `postid`;
TRUNCATE TABLE `postparsed`;
INSERT INTO `postparsed`
SELECT * FROM `bla`;
EDIT: u stvari jos pametnije bi bilo da se umesto SELECT * navedu imena svih polja, sa DISTINCT `postid`, umesto GROUP BY dela