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要在users表中插入1条记录,下面哪条语句是正确的()
A.InsertIntousers(id,user_namE.Valuee(100,"luhong")提示:id字段类型自动编号,因此,用户不能赋值
B.InsertIntousers(real_name,tel)Valuee("卢红","6545632")提示:user_name是主键必须赋值,但未赋值。
C.InsertIntousers(user_name,Email)Valuee("luhong","")提示:Email不是必填字段,但应该赋NULL值
D.InsertIntousers(user_name,Email)Valuee("luhong",NULL)
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