dollar/currency/money, call it whatever you like, but if it's got a $ in front of it, then it's a string, not a number. Your price
field should have been created as a decimal. I'm guessing it's a char type. You should also set your fields to default to 0, not
NULL.
The problem is with your setup, not mysql. You shouldn't mix formatting (the $ sign) with raw data, which is what you are doing.
What if the price is in euros? Then the $ is just wrong. Strip out the $ signs you mysql may be able to translate it correctly.
----- Original Message -----
From: "Karl Larsen" <[EMAIL PROTECTED]>
To: <mysql@lists.mysql.com>
Sent: Thursday, June 22, 2006 4:22 PM
Subject: Math problem
I'm trying to multiply numbers one of which is money. The money looks like
this:
SELECT price FROM titles;
| price |
+--------+
| $20.00 |
| $19.99 |
| $7.99 |
| $19.99 |
| $11.95 |
| $19.99 |
| $14.99 |
| $11.95 |
| $22.95 |
| $2.99 |
| $10.95 |
| $7.00 |
| $2.99 |
| $20.95 |
| NULL |
| $19.99 |
| $21.59 |
| NULL |
+--------+
18 rows in set (0.01 sec)
When I use SELECT title_id, ytd_sales * price From titles;
I get:
| title_id | ytd_sales | price * ytd_sales |
+----------+-----------+-------------------+
| PC8888 | 4095 | 0 |
| BU1032 | 4095 | 0 |
| PS7777 | 3336 | 0 |
| PS3333 | 4072 | 0 |
| BU1111 | 3876 | 0 |
| MC2222 | 2032 | 0 |
| TC7777 | 4095 | 0 |
| TC4203 | 15096 | 0 |
| PC1035 | 8780 | 0 |
| BU2075 | 18722 | 0 |
| PS2091 | 2045 | 0 |
| PS2106 | 111 | 0 |
| MC3021 | 22246 | 0 |
| TC3218 | 375 | 0 |
| MC3026 | NULL | NULL |
| BU7832 | 4095 | 0 |
| PS1372 | 375 | 0 |
| PC9999 | NULL | NULL |
+----------+-----------+-------------------+
18 rows in set (0.04 sec)
It appears that mysys 4.1 does not know how to multiply a dollar amount to
another number. Has anyone else seen this problem?
Karl
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
