CODEWITHSUNDEEP
sqldatabasevb.net
Raúl Olvera
Raúl Olvera

Reputation: 3

SQL Select where two condition

I have three tables, as in the example: How to join three tables to get Sum

I have added the field date to the tables Purchase and Invoce and filter all purchases and invoce minor to certain date provided as parameter in vb: 

SELECT P.Product_no, Inv.InvProdSum, Pur.PurProdSum
FROM Product P
LEFT JOIN (SELECT Product_no, SUM(Qty) AS InvProdSum
          FROM Invoice 
          WHERE date < @DateParameter
          GROUP BY Product_no) AS Inv
ON P.Product_no = Inv.Product_no
LEFT  JOIN (SELECT Product_no, SUM(Qty) AS PurProdSum
            FROM Purchase 
            WHERE date < @DateParameter
            GROUP BY Product_no) AS Pur
ON P.Product_no = Pur.Product_no

I also want to get two more columns in the results table: the sum of invoice and the sum of purchase where date = @DateParameter. My goal is to obtain, for example, if the date is 2017-January-27, the sum of Purchase prior to that date and the sum of Purchase of January only, and so for any date provided as a parameter. Same for invoce. I'm sorry for my English

Upvotes: 0

Views: 94

Answers (1)

NoAlias
NoAlias

Reputation: 9193

Add additional joins to the same tables with the different condition to get what you want:

SELECT P.Product_no, Inv.InvProdSum, Pur.PurProdSum. InvCurrent.InvProdSum AS [CurrentInvoiceProdSum], PurCurrent.PurProdSum AS [CurrentProductSum]
FROM Product P
LEFT JOIN (SELECT Product_no, SUM(Qty) AS InvProdSum
          FROM Invoice 
          WHERE date < @DateParameter
          GROUP BY Product_no) AS Inv
ON P.Product_no = Inv.Product_no
LEFT  JOIN (SELECT Product_no, SUM(Qty) AS PurProdSum
            FROM Purchase 
            WHERE date < @DateParameter
            GROUP BY Product_no) AS Pur
ON P.Product_no = Pur.Product_no
LEFT JOIN (SELECT Product_no, SUM(Qty) AS InvProdSum
          FROM Invoice 
          WHERE date = @DateParameter
          GROUP BY Product_no) AS InvCurrent
ON P.Product_no = InvCurrent.Product_no
LEFT  JOIN (SELECT Product_no, SUM(Qty) AS PurProdSum
            FROM Purchase 
            WHERE date = @DateParameter
            GROUP BY Product_no) AS PurCurrent
ON P.Product_no = PurCurrent.Product_no

If going against the transaction tables is just too much of a performance hit you can try getting your initial results that include current and past values and then query from that:

SELECT Product_no, Qty AS InvProdSum
INTO #tmpInvoice
FROM Invoice 
WHERE date <= @DateParameter

SELECT Product_no, Qty AS PurProdSum
INTO #tmpPurchase
FROM Purchase 
WHERE date <= @DateParameter

SELECT P.Product_no, Inv.InvProdSum, Pur.PurProdSum. InvCurrent.InvProdSum AS [CurrentInvoiceProdSum], PurCurrent.PurProdSum AS [CurrentProductSum]
FROM Product P
LEFT JOIN (SELECT Product_no, SUM(Qty) AS InvProdSum
          FROM #tmpInvoice 
          WHERE date < @DateParameter
          GROUP BY Product_no) AS Inv
ON P.Product_no = Inv.Product_no
LEFT  JOIN (SELECT Product_no, SUM(Qty) AS PurProdSum
            FROM #tmpPurchase 
            WHERE date < @DateParameter
            GROUP BY Product_no) AS Pur
ON P.Product_no = Pur.Product_no
LEFT JOIN (SELECT Product_no, SUM(Qty) AS InvProdSum
          FROM #tmpInvoice 
          WHERE date = @DateParameter
          GROUP BY Product_no) AS InvCurrent
ON P.Product_no = InvCurrent.Product_no
LEFT  JOIN (SELECT Product_no, SUM(Qty) AS PurProdSum
            FROM #tmpPurchase 
            WHERE date = @DateParameter
            GROUP BY Product_no) AS PurCurrent
ON P.Product_no = PurCurrent.Product_no

Upvotes: 1

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