I'm sure this has something to do with NULLS, but I just can't get my
head around this behaviour. More importantly, I can't SOLVE this
behaviour, and until I do I can't have any confidence in my data!
- Specs: Access 2007, Windows XP, data in linked (mySQL) table.
- I have a text (varchar) field called [HighestEducatio n] that
contains NULL values.
- I have a calculated field [HighestEducatio n_Valid] to check the
quality of the contents of the text field. The formula is:
IIf(IsNull([HighestEducatio n]),"No
Response",IIf([HighestEducatio n]="","Invalid/Incomplete","Co mplete"))
In my query results (datasheet), the contents of
[HighestEducatio n_Valid] are:
--- 287 COMPLETE
--- 1 INVALID/INCOMPLETE
--- 301 NO RESPONSE.
My problem is that when I use this query in a *subsequent* query (e.g.
SELECT [HighestEducatio n_Valid], COUNT(myID) FROM myQuery GROUP BY
[HighestEducatio n_Valid];), I get:
--- 287 COMPLETE
--- 302 INVALID/INCOMPLETE.
(Other notes:
- I've also tried IIf([HighestEducatio n] Is Null... but the behaviour
was unchanged.
- This is all happening in vanilla queries, no VBA involved at all.)
Any ideas?
Many thanks,
- Linda Patterson
- Dunedin, New Zealand
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