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Compare two Crosstabs

Posted on 2004-08-19
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Last Modified: 2008-01-16
I need to do a field by field comparison on the result of a crosstab query and a table.

Table 1 contains a list of datapoints that I've collected and for each ID if the data was collected i've denoted it w/ a 1.
Table 2 contains a list of datapoints that has been processed and in table 2 processed data is also denoted w/ a 1.

Table 3 needs to contain hits (a 1)  for each datapoint that has been collected but has not been processed in essence creating a to do list
for each ID by datapoint

Sample Data:

table 1
ID  dp1  dp2  dp3  dp4  dp5
1   0      1      0      1     1
2   0      0      1      0     1
3   1      0      1      1     1
4   0      1      1      1     0
5   1      1      1      0     0  

table 2
ID  dp1  dp2  dp3  dp4  dp5
1   0      1      0      0     0
2   0      0      1      0     1
3   1      0      1      0     1
4   0      0      0      0     0
5   0      1      0      0     0

table 3
ID  dp1  dp2  dp3  dp4  dp5
1   0      0      0      1     1
2   0      0      0      0     0
3   0      0      0      1     0
4   0      1      1      1     0
5   1      0      1      0     0

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Question by:swingler
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2 Comments
 
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Accepted Solution

by:
Eric Flamm earned 250 total points
ID: 11845164
Sounds like a logical "and" problem - bitwise arithmetic and all that. However, in Access, it's also pretty easy, I think.

I don't know if you need a general or specific solution  - here'a specific one:

create a query as follows:

select c.ID, c.dp1-p.dp1 as ToDoDp1, c.dp2-p.dp2 as ToDoDp2, c.dp3-p.dp3 as ToDoDp3, c.dp4-p.dp4 as ToDoDp4,
c.dp5-p.dp5 as ToDoDp5 from
Table1 c INNER JOIN Table2 p where c.ID=p.ID

note that the output field names are all prefaced with ToDo - that's just a field name, not a table alias like c and p.

I just used arithmetic - you could actually do this with Boolean datatypes (True/False) and the Nand (Not and) operator.

-ef
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Author Comment

by:swingler
ID: 11852979
perfect!
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