sql insert into table from select without duplicates (need more then a DISTINCT)

Question

I am selecting multiple rows and inserting them into another table. I want to make sure that it doesn\'t already exists in the table I am inserting multiple rows into.

Answer 1

If you already have a unique index on whatever fields need to be unique in the destination table, you can just use INSERT IGNORE (here's the official documentation - the relevant bit is toward the end), and have MySQL throw away the duplicates for you.

Hope this helps!