Grant,
>If I want to select all the products that are in the product_table, 
>but not in the sale_table, how to make the query?  The product_table 
>has all the products, but the sale table is a subset of the product_table.
SELECT * FROM product_table p
LEFT JOIN sale_table s USING (prod_id)
WHERE s.prod_id IS NULL;

PB


Grant Giddens wrote:
Hi,

  I have 2 tables like:

product_table:
prod_id
item_name
price
data
data
etc

sale_table:
prod_id
sale_price

If I want to select all the products that are in the product_table, but not in the sale_table, how to make the query?  The product_table has all the products, but the sale table is a subset of the product_table.

I tried:

SELECT item_name FROM product_table, sale_table WHERE product_table.prod_id != sale_table.prod_id but I'm not getting any results from that.

Sorry this code isn't exact, I'm not att my development PC at the moment.

Thanks,
Grant

		
---------------------------------
Brings words and photos together (easily) with
 PhotoMail  - it's free and works with Yahoo! Mail.
  

No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 267.15.6/257 - Release Date: 2/10/2006