Question

Help with validation rule

Asked by: sib_user

I have two fields on a form FROM_DATE and TO_DATE.  I want to set the validation property as follows on TO_DATE such that it is equal to or greater than from date.  I've tried the following but none seem to work:

>= [FROM_DATE]; [TO_DATE >= [FROM_DATE]; =[TO_DATE >= [FROM_DATE]

Can somebody please help me with the right form.

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Asked On
2009-11-05 at 08:58:18ID24875115
Topic

Microsoft Access Database

Participating Experts
2
Points
250
Comments
7

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Answers

 

by: peter57rPosted on 2009-11-05 at 09:08:18ID: 25751604

>= [FROM_DATE]
should work.

You are definitely setting this in the form and NOT in the table, aren't you?

 

by: harfangPosted on 2009-11-05 at 09:17:09ID: 25751674

The table validation rule would be:

    Validation Rule: Not([TO_DATE]<[FROM_DATE])
    Validation Text: your custom message here...

The Not() is used to allow one or both dates to be Null. If they are both required, this works as well:

    Validation Rule: [TO_DATE]>=[FROM_DATE]

(°v°)

 

by: sib_userPosted on 2009-11-05 at 09:25:20ID: 25751762

petere57r,

I most definitely am setting it on the form.  But nothing happens when I intentionally make FROM_DATE less than TO_DATE.  I am attaching a slightly modified form of the mdb for you to see for yourself.

 

by: sib_userPosted on 2009-11-05 at 09:27:25ID: 25751784

harfang,

Thanks for that but I would prefer to put the rule on the form.

 

by: peter57rPosted on 2009-11-05 at 09:33:44ID: 25751847

The lack of validation is cased by the fact you are filling the date in code.  Validation rule is for UI data entry.
You will have to do your test in code if you want to work this way.

 

by: sib_userPosted on 2009-11-05 at 09:44:44ID: 31650583

Thanks!

 

by: harfangPosted on 2009-11-05 at 10:05:36ID: 25752142

> Validation rule is for UI data entry.

However, the table validation rules are enforced all the time... But then it becomes a run-time error in the code setting the date, which might be undesirable.

(°v°)

20120131-EE-VQP-002

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