Question

It seems that we can not use Count (Distinct column) function in MS Access. I have following data and expected result as shown below

Looking for MS Access query which can give required result.

Data

ID     Name     Category    Person  Office
1      FIL       Global     Ben     london
1      FIL       Global     Ben     london
1      FIL       Overall    Ben     Americas
106   Asset      Global     Ben     london
156   ICICI      Overall    Rimmer  london
156   ICICI      Overall    Rimmer  london
188   UBS       Overall     Rimmer  london
9    Fund      Global       Rimmer  london

Expected Result

Person  Global_Cnt  Overall_Cnt    
Ben          2         1
Rimmer       1         2

Answer 1

Use a subquery to select the distinct values from your table.

In the parent query, GROUP BY Person, and use separate Count() expressions for each category. Count() only counts non-Null values, so use IIf() to return 1 for the category of interest and Null otherwise.

SELECT
    sub.Person,
    Count(IIf(Category = 'Global', 1, Null)) AS Global_Cnt,
    Count(IIf(Category = 'Overall', 1, Null)) AS Overall_Cnt
FROM
    (
        SELECT DISTINCT ID, Category, Person
        FROM YourTable
    ) AS sub
GROUP BY sub.Person;

I was unsure which fields identify your unique values, so chose ID, Category, and Person. The result set from the query matches what you asked for; change the SELECT DISTINCT field list if it doesn’t fit with your actual data.