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MS Access Compound Query

Posted on 2014-03-16
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Last Modified: 2014-04-01
Within an MS Access database, I need to filter for unique values in a single table and then produce a count for how many times each of those unique values appeared in the table.

The end goal is a single form in datasheet view that lists each unique value, its current record count, and the target sample size.  I can then apply the appropriate conditional formatting.

I have two tables.  

"table_questions" simply lists all the various questions ('question') in a survey and a number ('sample_size') representing the ideal sample size

"table_reponses" recorded responses to each survey question. The two columns are 'question' and "response'

So basically, I want to create a form in datasheet view that lists the unique questions in the "table_responses" table, count and report each time that question was in the table, and compare that number to the "sample_size" using the "question" as the primary key.

Any thoughts?
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Question by:chaddcarr
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Author Comment

by:chaddcarr
ID: 39933008
As an update, I figured out how to filter for distinct questions only, and produce a count for each:

SELECT
    Question
  , COUNT(*) AS count_distinct_questions
FROM
    ( SELECT DISTINCT
          Question
      FROM tbl_question_count
    ) AS tmp
GROUP BY
    Question;

Now I need to use the Question to query the table_questions table to get the targeted sample size...
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Accepted Solution

by:
PatHartman earned 400 total points
ID: 39933031
Select question, Count(*) As Response_count, sample_size
From table_questions Left Join table_Responses On table_questions.Question = table_Responses.Question
Group by question, sample_size;

This query should get both of the numbers you need.
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