MERGE Statement in SQL
MERGE statement in SQL is used to perform insert, update, and delete operations on a target table based on the results of JOIN with a source table. This allows users to synchronize two tables by performing operations on one table based on results from the second table.
The MERGE statement compares data between a source table and a target table based on specified key fields. It performs appropriate actions like inserting new records, updating existing ones, and deleting or flagging records no longer present in the source.
This statement provides a flexible way to manage data changes and is commonly used in scenarios like maintaining Slowly Changing Dimensions (SCD) in data warehouses.
SQL MERGE Statement
SQL MERGE Statement combines INSERT, DELETE, and UPDATE statements into one single query.
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