calculate new price based on percentage

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calculate new price based on percentage

Author

Topic

goliath_75
Starting Member

1 Post

Posted - 2013-09-11 : 05:39:26

I've got two database tables: product and original_prices. Both tables have a field product_id (key) and price. I want to add a certain percentage to all prices from table original prices, let's say 50%), and store (update) these prices within table product.

I've got this, but it fails at the percentage calculation.

UPDATE product, original_prices SET product.price *= (1 + original_prices.original_price * 50 /100) WHERE product.product_id=original_prices.product_id

It gives me the error:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '*= (1 + original_prices.original_price * 50 /100) WHERE product.product_id' at line 1

I hope someone can help me out with this.

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2013-09-11 : 06:07:52

try posting at dbforums.com or a mysql site. SQLTeam is on Microsoft SQL Server

KH
[spoiler]Time is always against us[/spoiler]

Lumbago
Norsk Yak Master

3271 Posts

Posted - 2013-09-11 : 08:33:57

Syntax is way off:


UPDATE a SET a.price = (b.original_price * 1.5) 
FROM product a 
  INNER JOIN original_prices b
WHERE a.product_id=b.product_id

- Lumbago
My blog-> http://thefirstsql.com

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