Filtering a product list with multiple tables

Question

First of all, I am quite "new" to php/mysql. I know some basic stuff and am following a course at Udemy right now. (Tips always welcome)

I have the following issue:

• I would like to generate an Article list from multiple Tables:

The List should contain our Article Number and the EAN and should only include Articles that are not already Listed in the SupplierData Table (So it will only contain Articles with missing Supplier info)

Table 1 ( ArticleDB)

Artnr	Ean	Price
1000	row	1,99
1001	row	2,99
1002	row	2,99
2000	row	2,99
3000	row	2,99

Table 2 (SupplierData)

Artnr	SupplierID	SupplierArtnr
1000	70	row
1000	60	row
1002	60	row
1002	70	row
1001	81	row

What I tried for now:

SELECT a.artnr, a.ean
FROM ArticleDB AS a
JOIN SupplierData AS b ON a.artnr = b.artnr
WHERE a.artnr NOT IN
(
SELECT Artnr
FROM SupplierData
WHERE SupplierID = 70
);

But it keept giving me a list with Data from other Suppliers. While i would like it ti only give out Numbers + EAN that are in ArtibleDB and do not yet have an entry in SupplierData for SupplierID 70

Example I was trying to get:

Artnr	Ean
1001	row
2000	row
3000	row

Am I missing something? Or does someone have an other idea how to make this work?

Kind regards,
Stan

Answer 1

I have got my answer (While testing and trying):

SELECT  a.artnr, a.ean
FROM    ArticleDB AS a
LEFT OUTER JOIN    SupplierDATA AS b ON a.artnr = b.artnr
WHERE   a.group != '---'
AND    a.group != 'TEC' 
AND    a.group != 'SER' 
AND a.artnr NOT IN
        (
            SELECT  Artnr
            FROM    SupplierData
            WHERE   SupplierID = 70
        )
      GROUP BY artnr
      ORDER BY artnr ASC;

Seems I had to force it to Group by artnr