Newbie to Sql Subqueries

Question

Newbie to Sql Subqueries

Jewel142 (ISP)

(OP)

15 Oct 11 11:33

I am new to SQL and I'm having a hard time with getting the right results from my subquery.

I am reporting off of three tables, Vendors, Invoices and Line Items and I am trying to get the results for each invoice that has more than one line item in the InoviceLines Table.

Here is my code so far but for some reason, I'm only getting four records instead of the six that I should be getting.  (I tested it in Excel).  What am I doing wrong?  I've tried changing my joins but nothing seems to work.

SELECT     Vendors.VendorName, Invoices.InvoiceID, InvoiceSequence, InvoiceLineItems.InvoiceLineItemAmount
FROM         Vendors INNER JOIN
                      Invoices ON Vendors.VendorID = Invoices.VendorID RIGHT OUTER JOIN
                      InvoiceLineItems ON Invoices.InvoiceID = InvoiceLineItems.InvoiceID
WHERE  InvoiceLineItems.InvoiceSequence IN
                     (SELECT InvoiceLineItems.InvoiceSequence
                     FROM InvoiceLineItems
                     WHERE InvoiceLineItems.InvoiceSequence >1)

I am so frustrated right now.  Any help would be greatly appreciated!

Jewel~

JarlH (Programmer) · Answer 1 · 2011-10-17 02:50:26

Without sample data and table defintions it's hard to find your problem. Which 2 rows aren't returned? How are those 2 different from the 4 rows that are returned?

Just guessing here, but what happens if you replace the subquery part with
WHERE  InvoiceLineItems.InvoiceID IN
                     (SELECT InvoiceLineItems.InvoiceID
                      FROM InvoiceLineItems
                      WHERE InvoiceLineItems.InvoiceSequence >1)

BTW, I can't see why you need to do that RIGHT OUTER JOIN, would a regular INNER JOIN give you the same result?

r937 (TechnicalUser) · Answer 2 · 2011-10-17 08:01:50

CODE

SELECT Vendors.VendorName
     , Invoices.InvoiceID
     , InvoiceLineItems.InvoiceSequence
     , InvoiceLineItems.InvoiceLineItemAmount
  FROM Vendors
INNER
  JOIN Invoices
    ON Invoices.VendorID = Vendors.VendorID
   AND EXISTS
       ( SELECT *
           FROM InvoiceLineItems
          WHERE InvoiceID = Invoices.InvoiceID
            AND InvoiceSequence > 1 )
INNER
  JOIN InvoiceLineItems
    ON InvoiceLineItems.InvoiceID = Invoices.InvoiceID

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Jewel142 (ISP) · Answer 3 · 2011-10-17 12:24:26

RE: Newbie to Sql Subqueries

Jewel142 (ISP)

(OP)

17 Oct 11 12:24

Thank you - it worked!

Jewel

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