Andy Hall wrote:
> Hi,
>
> I have just started using MySQL from MSSQL 7. I need to port the following
> into MySQL from an existing (working) query on MSSQL Server:
>
> SELECT product_id, name, description
> FROM products
> WHERE product_id NOT IN (SELECT product_id FROM sales WHERE customer_id =
> 10)
>
> i.e. get all the products that a particular customer has not already bought
>
> This errors, and I have since read that the MySQL "IN" does not allow
> sub-queries, but also seen examples of it done. Is it only supported in a
> later version? We are running v. 3.23.3.
subqueries requieres 4.x
try
SELECT product_id, name, description
FROM products
LEFT JOIN sales
ON products.product_id = sales.product_id
WHERE NOT sales.customer_id = 10
> I have also tried:
>
> SELECT product_id, name, description, sales.sale_id
> FROM products LEFT JOIN sales ON products.product_id = sales.product_id
> WHERE sales.customer_id = 10 AND sales.sale_id IS NULL
>
> This does not return any records as it seems to ignoring the LEFT JOIN part
> when I stick on the "WHERE sales.customer_id = 10".
> (pretty sure this query would work in MS-SQL)
this seems a bit different then this before
but should work, does
SELECT *
FROM sales
WHERE sales.customer_id = 10
AND sales.sale_id IS NULL
return any results?
> There must be a way to do this, but I dont seem to be able to put my finger
> on it and I would appreciate any help!
--
Sebastian Mendel
www.sebastianmendel.de
www.tekkno4u.de
www.nofetish.com
