Slow Report Load Speed with SQL Command

Question

I have the following SQL Command in my Crystal Report.  When I add the "SalesOrderDeliveries.omdDeliveryDate" to the report it examines 240,000 records and takes 3 minutes to completely load the report.  However, if I do not include this, it only examines 137,000 and only takes 10 seconds to run.
Why is this slowing down the report and running through more records than when it is omitted from the report?
SELECT
  SalesOrderDeliveries.omdDeliveryDate,
  SalesOrderDeliveries.omdSalesOrderID,
  Jobs.jmpJobID
FROM dbo.Jobs
INNER JOIN dbo.SalesOrderJobLinks
  ON Jobs.jmpJobID = SalesOrderJobLinks.omjJobID
INNER JOIN dbo.SalesOrders
  ON SalesOrderJobLinks.omjSalesOrderID = SalesOrders.ompSalesOrderID
INNER JOIN dbo.SalesOrderLines
  ON SalesOrders.ompSalesOrderID = SalesOrderLines.omlSalesOrderID
INNER JOIN dbo.SalesOrderDeliveries
  ON SalesOrderLines.omlSalesOrderID = SalesOrderDeliveries.omdSalesOrderID
WHERE SalesOrderDeliveries.omdShippedComplete = 0
AND Jobs.UJMPPMTRACK = -1
GROUP BY Jobs.jmpJobID,
         SalesOrderDeliveries.omdDeliveryDate,
         SalesOrderDeliveries.omdSalesOrderID
ORDER BY SalesOrderDeliveries.omdSalesOrderID

Answer 1

Try doing something like this for your query:
SELECT
  qryNextDate.nextDate,
  qryNextDate.omdSalesOrderID,
  Jobs.jmpJobID
FROM dbo.Jobs
INNER JOIN dbo.SalesOrderJobLinks
  ON Jobs.jmpJobID = SalesOrderJobLinks.omjJobID
INNER JOIN dbo.SalesOrders
  ON SalesOrderJobLinks.omjSalesOrderID = SalesOrders.ompSalesOrderID
INNER JOIN dbo.SalesOrderLines
  ON SalesOrders.ompSalesOrderID = SalesOrderLines.omlSalesOrderID
INNER JOIN (
  select omdSalesOrderID, min(omdDeliveryDate) as nextDate
  from dbo.SalesOrderDeliveries
  where omdShippedComplete = 0
  group by omdSalesOrderID) as qryNextDate
  ON SalesOrderLines.omlSalesOrderID = qryNextDate.omdSalesOrderID
where Jobs.UJMPPMTRACK = -1
ORDER BY SalesOrderDeliveries.omdSalesOrderID
This will get you just the minimum delivery date for each order, which should be the "next" due date.
-Dell