Not Equals in MS Access Query

From what I've seen this should work however it does not.
not equal ms accessalthough the SQL looks as I'd expect
...
WHERE (((BI.NRS_STATION)<>[NRS_STATION_IGNORE].[NRS_STATION_CODE]) AND...

Open in new window

I'm wanting to 'not include' any of the nursing stations that are present in the nrs_station_ignore table.

Thoughts?
markloessiAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
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.

peter57rCommented:
You can use :
WHERE (BI.NRS_STATION Not In (Select NRS_STATION_CODE] from [NRS_STATION_IGNORE]))
tliottaCommented:
Because there is an "AND" following your 'not equal' condition, that has a good chance of causing the problem. Whenever 'not equal' is combined with an "AND" in a WHERE clause, the entire WHERE clause needs to be known.

It's not always intuitive why it goes wrong, but it's usually easy to spot.

It might even affect the result with "NOT IN()".

Please show the entire clause if the problem continues.

Tom
danishaniCommented:
I don't see any joins with the tables you have shown in your screenshot.

I don't know if they are part of your SQL (Query) or not, but just want to mentioned it in case they are.
IT Pros Agree: AI and Machine Learning Key

We’d all like to think our company’s data is well protected, but when you ask IT professionals they admit the data probably is not as safe as it could be.

tliottaCommented:
To clarify, the "AND" isn't necessarily exactly the problem; but it indicates that there is more of the WHERE clause than we can see. It will be the totality of the WHERE clause that will be important when "not equal" is part of it.

RichardRost's suggestion to build the WHERE clause a segment at a time is a very good one. At some point of complexity, you should see that results get off track. That will be the point when the parts of the WHERE clause need explanation.

Tom
danishaniCommented:
It would be very helpful if you can post the whole SQL statement you have.
peter57rCommented:
The <> is wrong.  You must use a Not In() or equivalent.

The <> is wrong because the query is generating multiple records for each NRS-Station value and only one of those records will have a matching NRS-Station_code and so be excluded.  The other NRS-Station records will have all other possible values for NRS_Station_code and so will be selected.
To exclude all records from the result for all values of NRS_Station_code you must use the Not In() or equivalent code.
You don't actually need to include the [NRS_STATION_IGNORE] table in the query at all, so remove it.

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
keyuCommented:
Agreed with peter57r

this is best option

WHERE (BI.NRS_STATION Not In (Select NRS_STATION_CODE] from [NRS_STATION_IGNORE]))
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
Query Syntax

From novice to tech pro — start learning today.