Hoe om te gaan met meerdere opzoektabellen voor beginners van SQL?

SELECT  b.Supplier_Name,
        c.Supply_Type_Name,
        d.Itm_Name,
        a.Stock
FROM    db_supply a
        INNER JOIN lookup_supplier b
            ON a.Supplier_ID = b.Supplier_ID
        INNER JOIN lookup_supply_type c
            ON a.Supply_Type_ID = c.Supply_Type_ID
        INNER JOIN lookup_itm d
            ON a.Itm_ID = d.Itm_ID
WHERE   d.Itm_Name = 'Burger'

• SQLFiddle-demo

Bezoek de onderstaande link voor meer informatie over joins:

• Visuele weergave van SQL Doet mee

UITGANG

╔═══════════════╦══════════════════╦══════════╦═══════╗
║ SUPPLIER_NAME ║ SUPPLY_TYPE_NAME ║ ITM_NAME ║ STOCK ║
╠═══════════════╬══════════════════╬══════════╬═══════╣
║ Jesse         ║ Delivery         ║ Burger   ║     1 ║
╚═══════════════╩══════════════════╩══════════╩═══════╝