At 13:33 -0800 2/1/02, Jim Dickenson wrote: >I am running mysql Ver 11.15 Distrib 3.23.47, for pc-linux-gnu (i686) >installed from a binary RPM file. This is using RedHat Linux 7.2. > >I have a table described as: >mysql> describe junk; >+--------+---------------+------+-----+---------+-------+ >| Field | Type | Null | Key | Default | Extra | >+--------+---------------+------+-----+---------+-------+ >| record | decimal(3,0) | YES | | NULL | | >| title | varchar(250) | YES | | NULL | | >| num1 | float | YES | | NULL | | >| num2 | decimal(6,0) | YES | | NULL | | >| num3 | decimal(10,3) | YES | | NULL | | >| code | char(3) | YES | | NULL | | >| sdate | date | YES | | NULL | | >| stime | time | YES | | NULL | | >+--------+---------------+------+-----+---------+-------+ >8 rows in set (0.00 sec) > >It has the following data: >mysql> select record,num1 from junk; >+--------+----------+ >| record | num1 | >+--------+----------+ >| 1 | 12.3 | >| 2 | 17.785 | >| 3 | 138.981 | >| 4 | -34.12 | >| 5 | -12.7365 | >| 6 | -0.34 | >+--------+----------+ >6 rows in set (0.00 sec) > >The following command does not update the row I would like it to: >mysql> update junk set num1=12.4 where num1=12.3; >Query OK, 0 rows affected (0.01 sec) >Rows matched: 0 Changed: 0 Warnings: 0 > >Can I get some insight as to what the problem might be?
The inexactness of floating point arithmetic. --------------------------------------------------------------------- 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
