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WhichpseudocolumncouldyouusetoidentifyauniquerowinaFlashbackVersionsQuery?()A.XIDB.VERSIONS_PKC.VERSIONS_XIDD.VERSIONS_UNIQUE
题目
WhichpseudocolumncouldyouusetoidentifyauniquerowinaFlashbackVersionsQuery?()
A.XID
B.VERSIONS_PK
C.VERSIONS_XID
D.VERSIONS_UNIQUE