In this scenario, tableA has the data that customers interact with and tableB is a staging table that has updated data that tableA syncs with so tableA always has the freshest data. The query in this procedure takes the unique data from tableB, stores it in tableA, then deletes any data from tableA that is not in tableB, this way tableA doesnt have any lingering rows that are not in the original data source anymore.
Benny G
Created: Apr 7th 2022