单项选择题
A.REFERENCES B.SELECT C.UPDATE D.ALTER
A.REVOKE DROP ON t1 FROM PUBLIC B.REVOKE UPDATE ON t1 FROM PUBLIC C.REVOKE DELETE ON t1 FROM PUBLIC D.REVOKE CONTROL ON t1 FROM PUBLIC
A.Table B.Columns C.Table and Alias D.Columns and Alias
A.0 B.1 C.2 D.3
A.View B.Table C.Routine D.Package
A.Instance B.Table space C.System catalog D.Schema repository
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