Andy:
Sub queries are supported as of version 4.1 (see link #1). As for your
query, double-check the syntax in the select piece. Specifically take out
the 'sales.sale_id' and anything else from the 'sales' table. Then try
again.
Regards,
Adam
Link #1 - http://www.mysql.com/doc/en/ANSI_diff_Subqueries.html
-----Original Message-----
From: Andy Hall [mailto:andy@stripped]
Sent: Monday, September 08, 2003 10:02 AM
To: mysql@stripped
Subject: SubQueries and IN
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.
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)
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!
Thanks
Andy Hall.
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