表裏面有N條相同的記錄,要查出來.
如:
ID Name
12 d
34 e
543 t
34 e
12 d
45 y
543 t
查詢的結果應爲:
ID Name
12 d
12 d
34 e
34 e
543 t
543 t
假如表名爲Table03,可以用下面語句輕鬆實現:
select id,name from table03 where name in(select name from table03 group by name having count(name)>1)