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firstweekofyear in access 2010

Posted on 2012-03-22
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How do you use the constant firstweekofyear in access 2010 DateDiff function?
I am trying to filter if a date result is in previous year, current year or null
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Question by:simernet
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8 Comments
 
LVL 50

Expert Comment

by:Gustav Brock
ID: 37753864
That for week calculations, it won't tell you about the year.

Use Year for that:

intYearOfDate = Year(datYourDate)
If intYearOfDate = Year(Date()) Then ' this year.
If intYearOfDate = Year(Date()) - 1 Then ' last year.
Else ' other year.

/gustav
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LVL 34

Expert Comment

by:Norie
ID: 37753904
Not sure what constant you mean.

Anyway you don't need a constant for this, you could use Date /Year in an expression like this.

Switch(IsNull([DateField]), "Null", Year([DateField]) = Year(Date()), "This Year", Year([DateField]) = Year(Date())-1, "last Year")
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Author Comment

by:simernet
ID: 37754051
In english I am looking to see if a date occured anytime in the current year or if it falls anytime withing the previous year.  I also want to know if it is null.  
I have the Null part IsNull([disenrollDate])
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LVL 34

Expert Comment

by:Norie
ID: 37754063
The expression I posted does that and returns a string indicating if its null, in the current year or form last year.

What do you want have returned?
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LVL 1

Author Comment

by:simernet
ID: 37754166
I want this as a filter, so True or False.
I am looking for
True,  IsNull,
True,  This year
True, Last calendar year  ex. (01 JAN 2011  -  31 DEC 2011)
False if any year prior.

Cannot hard code in dates as it will float from year to year.
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LVL 34

Accepted Solution

by:
Norie earned 500 total points
ID: 37754248
What I posted didn't hardcode anything.

Anyway, just use this in the criteria for the filter.


Not IsNull([disenrollDate]) AND (Year([isenrollDate]) = Year(Date()) OR [disenrollDate]= Year(Date())-1

The Year functions returns the year of a date and Date returns the current date.

So today Year(Date()) returns 2012  but on this day next year will return 2013 and so on.
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Author Comment

by:simernet
ID: 37754347
Year([DisenrollDate])=Year(Date())-1 Or Year([DisenrollDate])=Year(Date()) Or IsNull([DisenrollDate])=True

Thanks,
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LVL 34

Expert Comment

by:Norie
ID: 37754435
Oops, don't know where that AND came from.
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