Which pseudocolumn could you use to identify a unique row in a Flashback Versions Query?
A.
XID
B.
VERSIONS_PK
C.
VERSIONS_XID
D.
VERSIONS_UNIQUE
Which pseudocolumn could you use to identify a unique row in a Flashback Versions Query?
Which pseudocolumn could you use to identify a unique row in a Flashback Versions Query?
C is correct:
https://docs.oracle.com/cd/E11882_01/appdev.112/e41502/adfns_flashback.htm#ADFNS01005
VERSIONS_XID
Identifier of the transaction that created the row version.