Lukas Eder • 3/13/2025

Think About SQL MERGE in Terms of a RIGHT JOIN

This technical article draws a parallel between the SQL MERGE statement and a RIGHT JOIN, arguing that MERGE's logic is essentially a right join between a target and a source table. It uses a concrete ETL example with staging tables to demonstrate how MATCHED and NOT MATCHED clauses correspond to the results of a right join, providing a clearer mental model for writing merge operations in SQL.

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#sql #merge #Rdbm