最近用PostgresSql數(shù)據(jù)庫進(jìn)行多表關(guān)聯(lián)刪除的操作，在寫sql語句的時(shí)候遇到了問題：

DELETE s.* FROM student s,classroom c WHERE s.cid = c.id AND s.sid = 1
DELETE FROM student s,classroom c WHERE s.cid = c.id AND s.sid = 1