Oracle GoldenGate for Distributed Applications and Analytics Administer Parsing the Message Fixed Width Parsing Key identification 9.2.2.3 Key identification A comment is used to identify key columns within the data record. In the following example Account has been marked as a key column for TABLE1. 01 TABLE1 * KEY 20 Account PIC X(19) 20 PAN_Seq_Num PIC 9(3) Parent topic: Fixed Width Parsing