CREATE TABLE X (FLD1 INT PRIMARY KEY); or CREATE TABLE X (FLD1 INT, UNIQUE(FLD1));
UNIQUE applies to an index, not a field. Andy Sy wrote: >----- Original Message ----- >From: "Paul DuBois" <[EMAIL PROTECTED]> >To: "Andy Sy" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> >Sent: Friday, June 14, 2002 2:45 AM >Subject: Re: Why does Key==Mul in DESCRIBE TABLE for unique key? > > >>At 2:03 +0800 6/14/02, Andy Sy wrote: >> >>>mysql> CREATE TABLE X (FLD1 INT UNIQUE); >>>Query OK, 0 rows affected (0.05 sec) >>> >>>mysql> DESCRIBE X; >>>+-------+---------+------+-----+---------+-------+ >>>| Field | Type | Null | Key | Default | Extra | >>>+-------+---------+------+-----+---------+-------+ >>>| FLD1 | int(11) | YES | MUL | NULL | | >>>+-------+---------+------+-----+---------+-------+ >>> >>>Doesn't MUL mean a key can exist multiple times >>>in the index? >>> >>Right. It means it's part of a non-unique index. >> > >But I declared the field as UNIQUE (see the CREATE >TABLE statement). > > > >--------------------------------------------------------------------- >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
