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How do I return search results for a field with multiple values?

6 New Member
I'm using Access 2002.

I have a query field set up that references a form, Policy_File_Inv entory, that has an unbound field, BarcodeNumber.

The form has several options related to the BarcodeNumber field. I am interested in what happens when the fourth option is selected. (The first and second selections work fine as is. The third option just displays all records.)

Expand|Select|Wrap|Line Numbers
  1. IIf([Forms]![Policy_File_Inventory]![Frame4]=1,[BoxBarcode] Is Null,
  2. IIf([Forms]![Policy_File_Inventory]![Frame4]=2,[BoxBarcode]=[Forms]![Policy_File_Inventory]![BarcodeNumber],
  3. IIf([Forms]![Policy_File_Inventory]![Frame4]=4,[FileBarcode]=[Forms]![Policy_File_Inventory]![BarcodeNumber] OR [ChildBarcode]=[Forms]![Policy_File_Inventory]![BarcodeNumber],"")))
The code I currently have here returns the results I want when the FileBarcode or ChildBarcode equals what is input into the BarcodeNumber field. The problem is that, in some cases, the ChildBarcode field has multiple values.

Is there some way I can make the search work when searching for one value listed in the ChildBarcode field for a record that has multiple values in the ChildBarcode field?


Note: I didn't set up this code. I just copied and pasted from another similar query and changed the field names to work with my new query and form. I also added the bit with the "OR [ChildBarcode]..." to make the fourth option search the ChildBarcode field in addition to the FileBarcode field.
I'm trying to figure this out myself and it isn't going very well.
Feb 23 '12
10 1658
NeoPa
32,584 Recognized Expert Moderator MVP
Ha! That makes sense. I didn't realise Access was that clever.

I'll explain why, but many, many people don't get Booleans so don't worry if you don't either.

Any value that is not zero will trigger a true branch. Tests are done in various places and ways and, fundamentally, they all come down to :
Expand|Select|Wrap|Line Numbers
  1. IF <Boolean> THEN <TrueOption> ELSE <FalseOption>
  1. As Booleans are stored as integers, it's possible for any value valid integer value to be treated as a Boolean.
  2. True = -1 (all 1s in binary) and False = 0 (all 0s in binary).
This leaves the question of values which are neither. These are treated as triggering the <TrueOption> when tested, yet are actually equal to neither True nor False. How, then, to test them in SQL if you must compare them with something (as this is all the Query grid allows)? The answer is to ensure they are not False, or :
Expand|Select|Wrap|Line Numbers
  1. <>False
Feb 26 '12 #11

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