junkone1@xxxxxxxxx wrote: > hI > i have a bad situation that i did not have primary key. so i have a > table like this > colname1 colname2 > 1 apple > 1 apple > 2 orange > 2 orange > > It is a very large table. how do i remove the duplctes quickly annd > without much change. Make a new table (with a primary key) and the same columns in order, and do: INSERT INTO newtable SELECT DISTINCT * FROM oldtable;