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Access nested Iff between dates

Posted on 2014-09-25
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Last Modified: 2014-09-25
Hi,

I would like a query in Access that does the following logic:

If ([CTFImport.DOB] >=#01/09/2014#) And [CTFImport.DOB]<=#31/08/2015#) then -5
else If ([CTFImport.DOB] >=#01/09/2013#) And [CTFImport.DOB]<=#31/08/2014#) then -4
else If ([CTFImport.DOB] >=#01/09/2012#) And [CTFImport.DOB]<=#31/08/2013#) then -3
else If ([CTFImport.DOB] >=#01/09/2011#) And [CTFImport.DOB]<=#31/08/2012#) then -2
else If ([CTFImport.DOB] >=#01/09/2010#) And [CTFImport.DOB]<=#31/08/2011#) then -1
else CTFImport.NCyearActual

I can do this in Crystal Reports but I am struggling in Access.. can you help please?

Thanks,

Tom
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Question by:tom_optimum
5 Comments
 
LVL 10

Accepted Solution

by:
JEaston earned 500 total points
ID: 40343817
I think you will need a series of IIF statement which use the Between comparator.

For example:
IIF([CTFImport.DOB] Between #01/09/2014# AND #31/08/2015#,-5, IIF([CTFImport.DOB] Between #01/09/2013# AND #31/08/2014#,-4, IIF([CTFImport.DOB] Between #01/09/2012# AND #31/08/2013#,-3, IIF([CTFImport.DOB] Between #01/09/2011# AND #31/08/2012#,-2, IIF([CTFImport.DOB] Between #01/09/2010# AND #31/08/2011#,-1,CTFImport.NCyearActual)))))

Alternately you could write your own function is VBA and use that.
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LVL 15

Expert Comment

by:Haris Djulic
ID: 40343821
try:

SELECT
    Switch(
        ([CTFImport.DOB] >=#01/09/2014#) And [CTFImport.DOB]<=#31/08/2015#), -5,
        ([CTFImport.DOB] >=#01/09/2013#) And [CTFImport.DOB]<=#31/08/2014#) , -4,
        ([CTFImport.DOB] >=#01/09/2012#) And [CTFImport.DOB]<=#31/08/2013#), -3,
		([CTFImport.DOB] >=#01/09/2011#) And [CTFImport.DOB]<=#31/08/2012#), -2,
        ([CTFImport.DOB] >=#01/09/2010#) And [CTFImport.DOB]<=#31/08/2011#) , -1
        ) AS result
from tabel_name

Open in new window

0
 
LVL 24

Expert Comment

by:Phillip Burton
ID: 40343833
IIf([CTFImport.DOB] >=#01/09/2014# And [CTFImport.DOB]<=#31/08/2015#,-5,
IIf([CTFImport.DOB] >=#01/09/2013# And [CTFImport.DOB]<=#31/08/2014#,-4,
IIf([CTFImport.DOB] >=#01/09/2012# And [CTFImport.DOB]<=#31/08/2013#,-3,
IIf([CTFImport.DOB] >=#01/09/2011# And [CTFImport.DOB]<=#31/08/2012#,-2,
IIf([CTFImport.DOB] >=#01/09/2010# And [CTFImport.DOB]<=#31/08/2011#,-1,
CTFImport.NCyearActual)))))

Open in new window

0
 

Author Closing Comment

by:tom_optimum
ID: 40343863
This worked perfect - thank you.

I didn't try the others - I thought it was fair to start with the first suggested one and work down.. but the first one worked great.

Thanks everyone for looking at this for me.

Cheers

Tom
0
 
LVL 100

Expert Comment

by:mlmcc
ID: 40343865
WIth the addition of one test, you can eliminate 5 tests from the formula.

Perhaps better from a performance standpoint.

IIF( [CTFImport.DOB]>=#01/09/2015#,CTFImport.NCyearActual,
IIf([CTFImport.DOB] >=#01/09/2014# ,-5,
IIf([CTFImport.DOB] >=#01/09/2013# ,-4,
IIf([CTFImport.DOB] >=#01/09/2012# ,-3,
IIf([CTFImport.DOB] >=#01/09/2011# ,-2,
IIf([CTFImport.DOB] >=#01/09/2010# ,-1,
 CTFImport.NCyearActual))))))

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Since by the fieldname these are probably dates of birth the first test could be eliminated since there shouldn't be any in the data that are greater than 1 Sep 2015.

mlmcc
0

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