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Dealing with Case sensitivity in MS Access

Posted on 2013-01-08
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Good morning,

I have a series of table which I need to incorporate into a MS Access DB.  The unique key in the source tables are from a DB structure where case is also considered so, where my source data defines 12345AB and 12345Ab as unique records, MS access states these are duplicates.

Any suggestions on how to tell MS Access that these are indeed to different records?
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Question by:MCaliebe
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Assisted Solution

by:Rey Obrero (Capricorn1)
Rey Obrero (Capricorn1) earned 300 total points
ID: 38755377
you can try using the strComp(s1,s2,vbBinarycompare)  function

?strcomp("12345AB","12345Ab",vbBinaryCompare)
-1
meaning string1 is less than string2
or

?strcomp("12345Ab","12345AB",vbBinaryCompare)
 1
meaning string1 is greater than string2
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peter57r earned 500 total points
ID: 38755443
There is no way that I know of to store case-sensitive key values- Access is intrinsically case insensitive except where coding is used to specify case-sensitive comparisons..
To store such values I think you would need to introduce a new primary key field and use the existing key values as data.
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Author Closing Comment

by:MCaliebe
ID: 38755957
Points awarded to both answers as they are both correct.  A function can be used to determine differences in a field as related to CASE, however as this item is to be used as a KEY value, MS Access won't function to differentiate based on case.
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Expert Comment

by:Patrick Matthews
ID: 38756031
A function can be used to determine differences in a field as related to CASE, however as this item is to be used as a KEY value, MS Access won't function to differentiate based on case.

Depends on what type of key you mean.  If you mean as a primary key, the above is correct.

As a join key, it could work, as cap1 demonstrated:

SELECT *
FROM tbl1, tbl2
WHERE StrComp(tbl1.ID, tb2.ID, 0) = 0

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