Question

I do not have enough reputation to post images. So here’s the scenario.

PartsID in CostPrice(databse table) relies on PartsID in PartsInfo(database table).
Lets say when the PartsInfo.PartsID = 1,
In CostPrice will only show all the related information of 1.

I’m using VS2010 and i try to build a query in datagridview,

SELECT costprice.costid, 
       costprice.suppliername, 
       costprice.costprice 
FROM   costprice 
       INNER JOIN partsinfo 
               ON costprice.partsid = partsinfo.partsid 

This is my query now, it still shows all the data kept in the database tables.
I would like to know the query for my situation.

Answer 1

SELECT CostPrice.CostID, CostPrice.SupplierName, CostPrice.CostPrice 
FROM CostPrice 
INNER JOIN PartsInfo ON CostPrice.PartsID = PartsInfo.PartsID
WHERE CostPrice = 1

or

SELECT CostPrice.CostID, CostPrice.SupplierName, CostPrice.CostPrice 
FROM CostPrice 
INNER JOIN PartsInfo ON CostPrice.PartsID = PartsInfo.PartsID
WHERE PartsInfo.PartsID = 1

Not sure which you want.