walt wrote: > I've run into a weird problem. If I try to insert this value, 78978978, > into a FLOAT(9,2) column, the value changes. See below. > System info: > MySQL-shared-3.23.51-1 > MySQL-client-3.23.51-1 > MySQL-devel-3.23.51-1 > MySQL-Max-3.23.51-1 > MySQL-3.23.51-1 > Red Hat Linux release 7.3 (Valhalla) > > #####Wrong > mysql> CREATE TABLE TIMMA ( AMOUNT FLOAT(10,2)); > Query OK, 0 rows affected (0.01 sec) > > mysql> INSERT INTO TIMMA VALUES(78978978); > Query OK, 1 row affected (0.00 sec) > > mysql> SELECT * FROM TIMMA; > +-------------+ > | AMOUNT | > +-------------+ > | 78978976.00 | > +-------------+ > 1 row in set (0.00 sec) > > #####Try again with different value > mysql> DROP TABLE TIMMA; > Query OK, 0 rows affected (0.00 sec) > > mysql> CREATE TABLE TIMMA ( AMOUNT FLOAT(10,2)); > Query OK, 0 rows affected (0.00 sec) > > mysql> INSERT INTO TIMMA VALUES(98978978); > Query OK, 1 row affected (0.01 sec) > > mysql> SELECT * FROM TIMMA; > +-------------+ > | AMOUNT | > +-------------+ > | 98978976.00 | > +-------------+ > 1 row in set (0.00 sec) > > sql, query
Hi, FLOAT values are stored internally as 32 bits floating point values that have only 6 or 7 significant digits. If you want more significant digits you should use DOUBLE or DECIMAL types instead. Regards -- Joseph Bueno --------------------------------------------------------------------- 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 <mysql-unsubscribe-##L=##[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
