How can I join on a stored procedure?

Question

I have a stored procedure that takes no parameters, and it returns two fields. The stored procedure sums up all transactions that are applied to a tenant, and it returns the

Answer 1

Your stored procedure could easily be used as a view instead. Then you can join it on to anything else you need.

SQL:

CREATE VIEW vwTenantBalance
AS

 SELECT tenant.ID AS TenantID, SUM(ISNULL(trans.Amount,0)) AS TenantBalance 
 FROM tblTenant tenant
 LEFT JOIN tblTransaction trans
 ON tenant.ID = trans.TenantID
 GROUP BY tenant.ID

The you can do any statement like:

SELECT t.TenantName, t.CarPlateNumber, t.CarColor, t.Sex, t.SSNO, t.Phone, 
    t.Memo, u.UnitNumber, p.PropertyName, TenantBalance
FROM tblTenant t
LEFT JOIN tblRentalUnit u
 ON t.UnitID = u.ID
LEFT JOIN tblProperty p
 ON u.PropertyID = p.ID
LEFT JOIN vwTenantBalance v 
 ON t.ID = v.tenantID
ORDER BY p.PropertyName, t.CarPlateNumber

Answer 2

insert the result of the SP into a temp table, then join:

CREATE TABLE #Temp (
    TenantID int, 
    TenantBalance int
)

INSERT INTO #Temp
EXEC TheStoredProc

SELECT t.TenantName, t.CarPlateNumber, t.CarColor, t.Sex, t.SSNO, t.Phone, t.Memo,
    u.UnitNumber, p.PropertyName
FROM tblTenant t
INNER JOIN #Temp ON t.TenantID = #Temp.TenantID
...

Answer 3

I actually like the previous answer (don't use the SP), but if you're tied to the SP itself for some reason, you could use it to populate a temp table, and then join on the temp table. Note that you're going to cost yourself some additional overhead there, but it's the only way I can think of to use the actual stored proc.

Again, you may be better off in-lining the query from the SP into the original query.