Hi. On Thu 2002-07-11 at 09:53:05 -0400, [EMAIL PROTECTED] wrote: > Bhavin, > > I am using distinct all 15 fields and order by all 15 fields, but there is > different order on 15 fields for distinct and order by.
Are all fields of binary types? If not, DISTINCT equals "sort -uf", not "sort -u" (i.e. ignore case) for those columns. Greetings, Benjamin. [...] > >> I have a 76,500,000 rows table with 15 fields. > >> I try to sort this rows on all fields, so I am using select all fields1 > >> group by all fields2 or distinct all fields1 with order by all fields2. > >> After sort, I get 62,000,000 rows. > >> > >> Then I use Linux unique sort, I dump out 76,500,000 table and using > >sort -u > >> file1 -o file2. > >> I got 76,000,000 rows. -- [EMAIL PROTECTED] --------------------------------------------------------------------- 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