sql篩選出重復(fù)數(shù)據(jù) 查找SQL多列記錄重復(fù)數(shù)據(jù)？
查找SQL多列記錄重復(fù)數(shù)據(jù)？select A，G，COUNT(*) FROM popu GROUP BY A，G HAVING COUNT(*)>1 其他列只能任取一個了，不同的數(shù)據(jù)庫函數(shù)會不同
查找SQL多列記錄重復(fù)數(shù)據(jù)？
select A，G，COUNT(*) FROM popu GROUP BY A，G HAVING COUNT(*)>1 其他列只能任取一個了，不同的數(shù)據(jù)庫函數(shù)會不同，例如: select A，G，max(B)，last(C)，first(D)，COUNT(*) FROM popu GROUP BY A，G HAVING COUNT(*)>1