At 18:00 -0400 5/10/02, Augey Mikus wrote: >is there a way for me to do it in a mysql delete statement? just >out of curiosity, for instance, if i wanted to add duplicates later >for whatever reason.
Okay, let's suppose you have 3947 instances of "abc". You can use LIMIT for this: DELETE FROM tbl_name WHERE col_name = "abc" LIMIT 3946; > >Paul DuBois wrote: > >>At 17:54 -0400 5/10/02, Augey Mikus wrote: >> >>>what i meant is deleting duplicate occurences of records of a >>>certain field. ...sorry... >> >> >>Ah. >> >>One thing you can do is add a unique index on that field with >>ALTER IGNORE TABLE tbl_name ADD UNIQUE (col_name) >>or >>ALTER IGNORE TABLE tbl_name ADD PRIMARY KEY (col_name) >> >>and MySQL will clobber duplicate records as it builds the index. >> >>> >>> >>>Paul DuBois wrote: >>> >>>>At 17:16 -0400 5/10/02, Augey Mikus wrote: >>>> >>>>>what is the simplest way to delete duplicate occurences of a >>>>>specific field in mysql? >>>>> >>>>>thanks, >>>>> >>>>>augey >>>> >>>> >>>> >>>>Your question is a bit ambiguous. You could do this by using ALTER >>>>TABLE to remove the column itself from the table, for example, but >>>>I'm guessing maybe that's not what you mean. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
