Very complicated syntax

Can someone help me with this syntax?

=DSum("[QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] in ('I','O')") + (DSum("QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND IsNull([TRNX_TYPE]) - DSum("QTY_ORDERED]","tblInventory","[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND IsNotNull([DATE_RECD]))

I probably have a lot wrong with it.
SteveL13Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Gustav BrockCIOCommented:
Try this:

=DSum("[QTY_ORDERED]","tblInventory",
"[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] in ('I','O')") +
(DSum("QTY_ORDERED]","tblInventory",
"[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] Is Null") -
DSum("QTY_ORDERED]","tblInventory",
"[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [DATE_RECD] Is Not Null")

/gustav
0
SteveL13Author Commented:
Am getting a #Error in the field on the form.

But when I copy/pasted your suggestion into the control source it didn't complain except that it wanted a ) at the end.
0
Gustav BrockCIOCommented:
Oh, sorry, but it's the other way round (line 3):

=DSum("[QTY_ORDERED]","tblInventory",
 "[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] in ('I','O')") +
DSum("QTY_ORDERED]","tblInventory",
 "[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] Is Null") -
DSum("QTY_ORDERED]","tblInventory",
 "[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [DATE_RECD] Is Not Null")

/gustav
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

SteveL13Author Commented:
Hmmm,

I tried picking this apart in sections.  When I cop/pasted the first part it gave me a result:

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

But when I tried the 2nd part by itself:

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

I get #Error in the field.
0
Gustav BrockCIOCommented:
You should correct the typo:

=DSum("[QTY_ORDERED]"

also for the third part.

/gustav
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
SteveL13Author Commented:
Perfect!
0
Gustav BrockCIOCommented:
Also, you may need to prevent Nulls:

=Nz(DSum("[QTY_ORDERED]","tblInventory",
  "[PART_NO] = '" & [Forms]![frmParts]![txtPART_NO] & "' AND [TRNX_TYPE] in ('I','O')"), 0)

for all three parts.

/gustav
0
SteveL13Author Commented:
Ok.  Will do.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Access

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.