SQL MERGE Statement Explained

There is no MERGE function in SQL, but there is a MERGE statement that combines INSERT, UPDATE, and DELETE operations based on specified conditions. Its purpose is to insert, update, and delete records in a target table based on the relationship between the source and target tables. If the data from the source table already exists in the target table, an update operation will be performed. If the data from the source table does not exist in the target table, an insert operation will be performed. If the data in the target table does not exist in the source table, a delete operation will be performed. The MERGE statement can be used to synchronize and update data between two tables.