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Another syntax issue

Posted on 2014-11-28
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Last Modified: 2014-11-29
What is wrong with:

(DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] ="ORD"")
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Question by:SteveL13
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LVL 22

Expert Comment

by:Flyster
ID: 40471071
See if this works:

(DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] = '" & "ORD")

Flyster
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LVL 18

Accepted Solution

by:
Simon earned 2000 total points
ID: 40471073
The initial "(" before DSUM and I think you want single quotes around string value 'ORD'

=DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] ='ORD' ")
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Author Closing Comment

by:SteveL13
ID: 40471088
That one worked.  Thank you!
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LVL 18

Expert Comment

by:Simon
ID: 40471105
You're welcome. I remember struggling when I first built these domain aggregate functions, especially when inserting control values like [Forms]![frmParts]![txtPART_NO] into the formula. I find it helps to temporarily replace them with a hard-coded value because it simplifies the testing and makes the formula easier to examine for balance (open/close brackets, paired single & double quotes).
=DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] ="ORD"") 
v
=DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '55' AND [TRNX_TYPE] ='ORD' ") 

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Notice that when you take the reference to the control out you can also take out the surrounding & and " from either side, so it makes quite a difference to the length of the formula.
Also worth spacing out the single and double quotes where possible to improve readability.
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Author Comment

by:SteveL13
ID: 40471606
Simon,

Yes, the single and double quotes really confuse me.  

--Steve
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