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Examinethefollowingoutput：SQL>SELECTindex_name，statusFROMdba_indexesWHEREstatus=’UNUSABLE’；INDEX_NAMESTATUS-----------------------------------------EINDUNUSABLEWhichtwostatementsabouttheaboveindexaretrue（）
A.Itisignoredbythequeryoptimizer.
B.Itisnotusedwhiletheindexisbeingrebuilt.
C.Theindexcannotberebuilt，andhastobere-created.
D.Theindexisautomaticallyrebuiltwhenusedthenexttime
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更多 “ Examinethefollowingoutput：SQLSELECTindex_name，statusFROMdba_indexesWHEREstatus=’UNUSABLE’；INDEX_NAMESTATUS-----------------------------------------EINDUNUSABLEWhichtwostatementsabouttheaboveindexaretrue（）A.Itisignoredbythequeryoptimizer.B.Itisnotusedwhiletheindexisbeingrebuilt.C.Theindexcannotberebuilt，andhastobere-created.D.Theindexisautomaticallyrebuiltwhenusedthenexttime ” 相关考题
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