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Helper I

## Distinct Count with grouping for calculated column

Hi All,

I've tried to search the answer to my question but have failed on the numerous paths I've followed so am hoping you are able to help.

I have the following columns and what I want to do is create a calculated column to provide a distinct count where for A where, B is different, so:

Column1   Mapping       COUNT

A                AA1               2

A                AA1               2

A                AA2               2

B                AA1               2

B                AA2               2

C                AA1               1

C                AA1               1

C                AA1               1

So hopefully this makes sense, for A there are two distinct different mappings provided, the same for B. For C though there is only one distinct mapping provided

1 ACCEPTED SOLUTION

Accepted Solutions
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Solution Supplier

Try using this for Calculated column:

```Count Column =
VAR v_SeriesCnt = CALCULATE
(
DISTINCTCOUNT( Data[Mapping] ),
ALLEXCEPT( Data, Data[Column1] )
)
RETURN
v_SeriesCnt```

Thanks.

6 REPLIES 6
Highlighted
Solution Supplier

Try using this for Calculated column:

```Count Column =
VAR v_SeriesCnt = CALCULATE
(
DISTINCTCOUNT( Data[Mapping] ),
ALLEXCEPT( Data, Data[Column1] )
)
RETURN
v_SeriesCnt```

Thanks.

Highlighted
Helper I

@vaibhavdesai Wow, that work just as I wanted.

I'm sure it's going to be over my head but what does the VAR v_SeriesCnt do? I'm assuming v_SeriesCnt is the name of the variable.

Highlighted
Solution Supplier

That's correct. It is just a variable.

Highlighted
Helper I

Why does the formula have to be inside the variable? What's it's impact?

Highlighted
Solution Supplier

It does not have to be inside a variable. You can write it without variable too.

```Count Column =
CALCULATE
(
DISTINCTCOUNT( Data[Mapping] ),
ALLEXCEPT( Data, Data[Column1] )
)```

Thanks.

Highlighted
Helper I

Cool.

So I'm going to try to explain this formula, please correct me (if you want to that is) where I've gone astray.

So the ALLEXCEPT is used as a filter where in theory it only looks at Column 1 and rest of the formula looks at the distinct mappings for those?

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