Question

I’m having an issue with finding and deleting duplicate records, I have a table with IDs called CallDetailRecordID which I need to scan and delete records, the reason there are duplicates is that I’m exporting data to special arching engine works with MySQL and it doesn’t support indexing.

I tried using “Select DISTINCT” but it dosn’t work, is there is another way? I’m hoping I can create a store procedure and have it run weekly to perform clean up.

your help is highly appreciated.

Thank you

Answer 1

CREATE TABLE tmp_table LIKE table    
INSERT INTO tmp_table (SELECT * FROM table GROUP BY CallDetailRecordID)
RENAME table TO old_table
RENAME tmp_table to table

Drop the old table if you want, add a LOCK TABLES statement at the beginning to avoid lost inserts.