Question

I’m trying to figure out joining two querys into one. Or if I should or need to.

I have this…

    SELECT      
    cd.SalesRep_ID AS CustomersSalesRep_ID
    FROM `CustomerDetails` cd
    WHERE cd.Customer_ID = $Customer_ID

That works fine and gives me the ‘SalesRep_ID’ that I’m looking for.

But I need that ‘SalesRep_ID’ for the next query like this…

    SELECT      
    cd.IsSalesRep, cd.RepCom, cd.SalesRep_ID, sr.RepDispName, sr.DefaultRepCom

    FROM `CustomerDetails` cd
    LEFT JOIN `SalesReps` sr
    ON cd.SalesRep_ID = sr.SalesRep_ID
    WHERE cd.Customer_ID = $Customer_ID
    AND sr.SalesRep_ID = $CustomersSalesRep_ID

Using both of these produces the results I’m looking for. However can they be joined together, or do they do to be?

Answer 1

If I’ve understood correctly, this is what you’re after:

SELECT cd.SalesRep_ID AS CustomersSalesRep_ID,
       cd.IsSalesRep,
       cd.RepCom,
       cd.SalesRep_ID,
       sr.RepDispName,
       sr.DefaultRepCom
FROM   CustomerDetails AS cd LEFT JOIN SalesReps AS sr USING(SalesRep_ID)
WHERE  cd.Customer_ID = $Customer_ID