At 10:55 -0600 2/1/02, Rick Emery wrote: >It's created when that field is the first field in a multi-field index.
That's always what I think at first when I see "MUL", too. Actually, it means the column is part of a non-unique index. > >For example: > >mysql> describe mytable; >+-------+---------+------+-----+---------+-------+ >| Field | Type | Null | Key | Default | Extra | >+-------+---------+------+-----+---------+-------+ >| id | int(11) | YES | | NULL | | >| val | char(5) | YES | | NULL | | >+-------+---------+------+-----+---------+-------+ >2 rows in set (0.38 sec) > >mysql> alter table mytable add index qq(id,val); > >mysql> describe mytable; >+-------+---------+------+-----+---------+-------+ >| Field | Type | Null | Key | Default | Extra | >+-------+---------+------+-----+---------+-------+ >| id | int(11) | YES | MUL | NULL | | >| val | char(5) | YES | | NULL | | >+-------+---------+------+-----+---------+-------+ >2 rows in set (0.00 sec) > >-----Original Message----- >From: Shon Stephens [mailto:[EMAIL PROTECTED]] >Sent: Friday, February 01, 2002 10:24 AM >To: [EMAIL PROTECTED] >Subject: what type of key is this? > > >i have been asked to create an sql table with a certain structure. i was >sent a >description of the table. the first column is desribed as having a "MUL" >key. i don't now what that is or how to create it. can someone please help. > >thanks, >shon > > > >--------------------------------------------------------------------- >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 > >--------------------------------------------------------------------- >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 --------------------------------------------------------------------- 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
