The problem is the question, before I start. Is it going to overwrite the data for existing primary keys? I want the overwrite, instead of rejection or duplication. I like to update existing records with the new data.

Almost all databases provide some mechanism for updating tables without clearing them. Take a look at your local database's documentation. For MySQL and PostgreSQL take a look at ALTER TABLE.

(and of course be sure to take backups before hand.)

In reply to Re^3: Database Re-Insert by adrianh
in thread Database Re-Insert by artist

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