alter table使用方法简介.doc
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ALTERTABLE
Purpose
UsetheALTERTABLEstatementtoalterthedefinitionofanonpartitionedtable,apartitionedtable,atablepartition,oratablesubpartition.Forobjecttablesorrelationaltableswithobjectcolumns,useALTERTABLEtoconvertthetabletothelatestdefinitionofitsrefe
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