共找到 7 与NULLD 相关的结果,耗时1 ms
A.AGE IS NULLB.NOT(AGE IN NULL)C.AGE=NULLD.AGE IS NOT NULL
在SQL中,下列涉及空值的操作,不正确的是A.AGE IS NULLB.NOT(AGE IS NULL)C.AGE = NULLD.AGE IS NOT NULL
SQL语言中,级联删除的短语是A.WHEN DELETE RESTRICTB.ON DELETE RESTRICTC.ON DELETE SET NULLD.ON DELETE CASCADE
在SQL中,下列涉及空值的操作,不正确的是A.AGE IS NULLB.NOT(AGE IS NULL)C.AGE=NULLD.AGE IS NOT NULL
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