题目内容
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[主观题]
SQL Server 2005支持下列约束:______、______、______、______、______。
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A.OREIGN约束
B.EFAULT约束
C.UNIQUE约束
D.HECK
A.update students set Grade = Grade + 10
B.update * set Grade = Grade +10
C.update * from students set Grade =Grade +10
D.update students set Grade 二 Grade +10