Question

Add columns depending on the month.

Asked by: sluggo

I have columns 01,02,03,04,05,06,07,08,09,10,11,12.  Each is the month (01=January, etc.) and the contents are numeric.

I would like to add a column called YOY (Year over Year).  I have another column called date which has a date field.  YOY = SUM(all the columns prior to the max month in the date field).  So if the max date in the Date field is 03/15/03, then the YOY=[01]+[02].  If it's 04/15, then YOY=[01]+[02]+[03].

Thanks

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Asked On
2003-04-16 at 08:23:06ID20587140
Topic

Microsoft Access Database

Participating Experts
3
Points
250
Comments
7

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Answers

 

by: bonjour-autPosted on 2003-04-16 at 08:42:56ID: 8341800

If you want to do it directly in SQL:

SELECT datecalc.*, [01]*IIf(Month([targetdate])<1,0,1)+[02]*IIf(Month([targetdate])<2,0,1)+[03]*IIf(Month([targetdate])<3,0,1)+[04]*IIf(Month([targetdate])<4,0,1)+[05]*IIf(Month([targetdate])<5,0,1)+[06]*IIf(Month([targetdate])<6,0,1) AS YOY
FROM datecalc;

e.g. for half year

not very elegant, but it works
one could put the Iif-Sequence to a Public Function

Regards, Franz

 

by: dabudabuPosted on 2003-04-16 at 08:59:12ID: 8341931

Can you explain better?
When you refer to "max month in the date field" do you intend the max month inside the entire table?
For example (with date in yyyy/mm/dd format):

---------------------------------
01 02 03 ... 12   Date       YOY
---------------------------------
x1 y1 z1 ... k1  2001/09/12   ?
x2 y2 z2 ... k1  2003/03/04   ?
---------------------------------

You simply use month 09 for the first row and 03 for the second (the month in th data field of the row), or the max month is 09 for both rows (09 > 03) or the max month is 03 for both rows (cause the data containing the 03 month is greater than the data containing 09 month)?

The solution depends on what you intend.

Bye

 

by: militaxPosted on 2003-04-16 at 09:59:05ID: 8342398

it's is good...
SELECT datecalc.*, [01]*IIf(Month([targetdate])<1,0,1)+[02]*IIf(Month([targetdate])<2,0,1)+[03]*IIf(Month([targetdate])<3,0,1)+[04]*IIf(Month([targetdate])<4,0,1)+[05]*IIf(Month([targetdate])<5,0,1)+[06]*IIf(Month([targetdate])<6,0,1) AS YOY
FROM datecalc;

Is very efficient.


 

by: sluggoPosted on 2003-04-16 at 10:08:32ID: 8342470

bonjour-aut:

I need to determine the target date by another query.  Could you show me how the Function could be built?

I determine the targetdate with:
SELECT Max(tblREPORT02.FileDate) AS [Max]
FROM tblREPORT02;

Your query then works with the targetdate from the other query included.

Or is there a means of embedding the targetdate query within the query you wrote?

 

by: bonjour-autPosted on 2003-04-16 at 10:48:12ID: 8342760

i will be back in 2 hours

 

by: bonjour-autPosted on 2003-04-16 at 13:07:42ID: 8343834

you store the max-query("qry_maxdt") and change "targetdate" to the name of the maxfield e.g. "maxdt":
*********************
SELECT datecalc.*, [01]*IIf(Month([maxdt])<1,0,1)+[02]*IIf(Month([maxdt])<2,0,1)+[03]*IIf(Month([maxdt])<3,0,1)+[04]*IIf(Month([maxdt])<4,0,1)+[05]*IIf(Month([maxdt])<5,0,1)+[06]*IIf(Month([maxdt])<6,0,1) AS YOY
FROM datecalc, qry_maxdt;
**********************

be careful ! the table datecalc and qry_maxdat are not joined ! that is in this case ok, because qry_maxdat only gives one value.
doing similar things with normal queries will result in multiplication of records.

Rgards, Franz

 

by: sluggoPosted on 2003-04-16 at 13:23:15ID: 8343930

I tried something similar and received an 'ambiguous' join error.

20120131-EE-VQP-002

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