SQL语言中,级联删除的短语是A.WHEN DELETE RESTRICT B.ON
题型:单项选择题
问题:
SQL语言中,级联删除的短语是
A.WHEN DELETE RESTRICT
B.ON DELETE RESTRICT
C.ON DELETE SET NULL
D.ON DELETE CASCADE
SQL语言中,级联删除的短语是
A.WHEN DELETE RESTRICT
B.ON DELETE RESTRICT
C.ON DELETE SET NULL
D.ON DELETE CASCADE