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eclipse-learner
answered Aug 24 '21 00:00
Merge means make one table from two tables by merging its values.UPSERT is a database term.
UPSERT means to insert or update, suppose you run a query of the UPSERT, it checks with the primary field that the record exists or not. if not exists it will insert a new record and if already exists it will update the table fields' value.
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