SQL query syntax for loop (Classic ASP) - sql

Question

I have 4 tables and the following SQL query:
SELECT * FROM dbo.Synola, dbo.Stores, dbo.Fpa, dbo.Nomismata
WHERE
dbo.Stores.Store_id = dbo.Synola.Store_id
AND
dbo.Stores.fpa_id = dbo.Fpa.fpa_id
AND
dbo.Stores.nomisma_id = dbo.Nomismata.nomisma_id
The above works fine and without errors.
My problem is that when I am trying to loop the above query:
Currently, in my Stores TABLE, I have only 2 stores and I want in the loop to get results ONLY for 2 records. The 2 records with my 2 stores. But unfortunately I am receiving more than 2 records.
Which is the correct syntax of my query in a way to receive results only for my 2 stores in the loop?

Answer 1

This should only retrieve data that's available in ALL tables. Therefore, it there's not a match to the main Stores table, then the result wont show.
SELECT *
FROM Stores s
JOIN Synola sy ON sy.Store_id = s.Store_id
JOIN Fpa f ON f.fpa_id = s.fpa_id
JOIN Nomismata n ON n.nomisma_id = s.nomisma_id
If you are getting more rows because there are more matches in other tables, then you need to look into adding more WHERE conditions or using another type of JOIN.
More info: https://www.codeproject.com/Articles/33052/Visual-Representation-of-SQL-Joins
Edit: To see where you are getting multiple matches on your JOIN:
SELECT s.Store_id "Store_id from Store",
,sy.Store_id "Store_id from Synola"
,s.fpa_id "fpa_id from Store"
,f.fpa_id "fpa_id from Fpa"
,s.nonisma_id "nomisma_id from Store"
,n.nonisma_id "nomisma_id from Nomismata"
FROM Stores s
JOIN Synola sy ON sy.Store_id = s.Store_id
JOIN Fpa f ON f.fpa_id = s.fpa_id
JOIN Nomismata n ON n.nomisma_id = s.nomisma_id