cleaning up db of redundant data

Question

locid   country city
39409   US  Aaronsburg
128426  US  Aaronsburg
340356  US  Aaronsburg
429373  US  Aaronsburg
422717  US  Abbeville
431344  US  Abbeville
433062           


        

Answer 1

1. Select the unique records and insert into another temporary table of the same schema.
2. delete everyting from his table
3. Select and insert back in from the temporary table.
4. Remove temporary table