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convert inline IF to CASE statement

Posted on 2013-01-11
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Last Modified: 2013-01-15
can someone help me convert the following formula:

IIf(CDec(Sum(IIf(Fields!OrderLineStatus.Value = "OPEN", Fields!OrderBalanceQty.Value, CDec(0)))) <> 0, (CDec(Sum(IIf(Fields!OrderLineStatus.Value = "OPEN", (Fields!OrderBalanceQty.Value * Fields!OrderPrice.Value), CDec(0)))) / CDec(Sum(IIf(Fields!OrderLineStatus.Value = "OPEN", Fields!OrderBalanceQty.Value, CDec(0))))), 0)

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to a SQL CASE statement?

The name of the fields are the same.

Thank you!
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Question by:metropia
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Expert Comment

by:LIONKING
ID: 38768474
I could help you, but I kind of don't understand the formula.
I see you have a sum so I guess you're grouping somehow, but I see that you have orderBalanceQuantity * OrderPrice / OrderBalanceQuantity

Wouldn't that give you OrderPrice?
Sorry if this is a dumb question, I just want to understand what you need.
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Expert Comment

by:awking00
ID: 38768510
Can you describe what you're trying to accomplish in plain language? Rather than trying to convert, it is often easier to just write the syntax if we know the objective.
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Author Comment

by:metropia
ID: 38768516
the formula was part of a report, i want to calculate the weighted price. is not dumb question, i am also confused by some of the formulas i am finding in some of the reports, and no one to ask.
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Assisted Solution

by:Ryan McCauley
Ryan McCauley earned 200 total points
ID: 38768967
If I'm reading your formula correctly, you're looking for this:

SUM(CASE WHEN Fields!OrderLineStatus.Value <> "OPEN" THEN 0
		 WHEN Fields!OrderBalanceQty.Value = 0 THEN 0
		 ELSE Fields!OrderBalanceQty.Value *
			  Fields!OrderPrice.Value /
			  Fields!OrderBalanceQty.Value
	END)

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Effectively, you're returning zero if either the LineStatus <> "OPEN" or if the BalanceQuantity=0. Assuming both of those are false (status = OPEN and Quantity <> 0), it performs the calculation.
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Accepted Solution

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Chris Luttrell earned 250 total points
ID: 38769110
He is taking an IF statement from SSRS and trying to accomplish the same outcome in a SQL statement.  Given the Fields names are the same as the Columns on the table this code should work in SQL:
SUM(CASE WHEN OrderLineStatus <> "OPEN" THEN 0
		 WHEN OrderBalanceQty = 0 THEN 0
		 ELSE OrderBalanceQty *
			  OrderPrice /
			  OrderBalanceQty 
	END)

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LVL 28

Expert Comment

by:Ryan McCauley
ID: 38770017
I figured, but I wasn't sure if the field names actually matched, so I thought I'd let the OP swap those out themself - if they match exactly, then yours is what they'd actually use.
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Author Comment

by:metropia
ID: 38775012
question,


what would be the operator order on this part?


OrderBalanceQty *  OrderPrice / OrderBalanceQty


should it he like:

( OrderBalanceQty *  (OrderPrice / OrderBalanceQty ))

or

((OrderBalanceQty *  OrderPrice) / OrderBalanceQty )
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Assisted Solution

by:LIONKING
LIONKING earned 50 total points
ID: 38775055
The order of multiplication and division operators is the same... It doesn't matter in what order you put them, the result will not vary.

For example:


OrderBalanceQty *  OrderPrice / OrderBalanceQty = ( OrderBalanceQty *  (OrderPrice / OrderBalanceQty )) = ((OrderBalanceQty *  OrderPrice) / OrderBalanceQty ) = OrderPrice

The only way the value would change is if the operation (multiplication) is done in the denominator, which doesn't seem likely in this case.
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Assisted Solution

by:Ryan McCauley
Ryan McCauley earned 200 total points
ID: 38775228
It would execute left to right (since order of operations on multiplication/division don't matter), but that won't affect the results at all. If you had addition in there, it would execute the multiplication first, using the standard order of operations.

The only thing you need to be concerned about for your calculation is the divisor - it needs to be non-zero or you'll get the error. As long as it's non-zero, the other values can be anything.
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