Merge Statement in Oracle | Merge Statement in SQL

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This video demonstrates the merge statement in SQL and Oracle.
Which can help us Insert , Update and delete our table using a single statement
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How to implement scd type 2 in ORACLE using merge statement..when matched we need to update the record as well as insert.how to do that in oracle database..i don't find any video on this in entire social media.. please help

sreelakshmia
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Can you please implement the same in postgre sql

dileep