
SQL Tip: Select Only Rows That DON'T Match In Two Tables
If you're importing data from one table to another, you will probably want to avoid duplicating data. Use this query to select rows from the source table (t1) that DON'T exist in the destination table (t2).
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Good luck Edward. Valuable asset to compliment the other valuable asset (Knotty I mean).
Comment added to: Welcome, Edward