Question

I have written this query; I need help in assigning variable; which is coming from other query, How can I do that.

How can I combine them together?

Query 1

Select SUM(Credit)
FROM(SELECT TOP 1  Credit
FROM (SELECT DISTINCT TOP 2 Ref, Credit, PaymentID 
FROM  Payment where  Ref =  '????'  AND PaymentID <= '????' 
ORDER BY PaymentID DESC)
a ORDER BY PaymentID)
b

Query 2

Select Ref, PaymentID 
From Payment
Where PaymentDate = '2012-09-23'

SO I need Ref and PaymentID of Query 2 and use as variable in Query 1

Answer 1

By using a join

SELECT DISTINCT TOP 2 Ref, Credit, PaymentID      
FROM  Payment 
    inner join
    (Select Ref, PaymentID  From Payment Where PaymentDate = '2012-09-23' ) query2
        on Payment.Ref = query2.Ref and Payment.PaymentID <= query2.PaymentID      
ORDER BY PaymentID DESC