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DAX measure: MIN date for historical data in live connection

Hello all,

 

I have a live connection to a SQL table “table1” with historical data.

 

Example Data:

ID

Status

Start

End

Changed

1

A

2022-05-13

 

2022-05-13

1

B

2022-05-13

 

2022-05-14

2

A

2022-05-15

 

2022-05-15

3

A

2022-05-15

 

2022-05-15

2

C

2022-05-15

2022-05-16

2022-05-16

3

B

2022-05-15

 

2022-05-16

3

B

2022-05-15

 

2022-05-17

3

C

2022-05-15

2022-05-18

2022-05-18

4

A

2022-05-15

 

2022-05-15

4

A

2022-05-15

 

2022-05-16

5

A

2022-05-16

 

2022-05-16

 

What to achieve:

Now, I would like to get the MIN Start-date with Status “A” if the corresponding ID had no other Status since then.

 

Expected Result:

The output regarding the example table would be 2022-05-15. Solution: ID 4 and ID 5 are the only IDs that did not switch their state. ID 4 provides an earlier start date then ID 5.

 

 

I tried different approaches, like comparing a subset of Status A with a subset of other statuses to get the IDs that are in subset A but not in the other one. Another means could be an index if it would be possible to calculate a column.

 

However, since it is a live connection, I cannot calculate new tables or columns. The DAX measure has to be calculated without those intermediate steps. A change of the connection type is not possible.

 

I appreciate your help!

Thanks.

1 ACCEPTED SOLUTION
Jihwan_Kim
Super User
Super User

Hi,

Please check the below picture and the attached pbix file.

 

sample.png

 

Desired outcome measure: = 
VAR _IDunderA =
    SUMMARIZE ( FILTER ( Data, Data[Status] = "A" ), Data[ID] )
VAR _IDunderothers =
    SUMMARIZE ( FILTER ( Data, Data[Status] <> "A" ), Data[ID] )
VAR _IDonlyA =
    EXCEPT ( _IDunderA, _IDunderothers )
VAR _newtable =
    CALCULATETABLE ( Data, TREATAS ( _IDonlyA, Data[ID] ) )
RETURN
    MINX ( _newtable, Data[Start] )

If this post helps, then please consider accepting it as the solution to help other members find it faster, and give a big thumbs up.


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View solution in original post

2 REPLIES 2
Jihwan_Kim
Super User
Super User

Hi,

Please check the below picture and the attached pbix file.

 

sample.png

 

Desired outcome measure: = 
VAR _IDunderA =
    SUMMARIZE ( FILTER ( Data, Data[Status] = "A" ), Data[ID] )
VAR _IDunderothers =
    SUMMARIZE ( FILTER ( Data, Data[Status] <> "A" ), Data[ID] )
VAR _IDonlyA =
    EXCEPT ( _IDunderA, _IDunderothers )
VAR _newtable =
    CALCULATETABLE ( Data, TREATAS ( _IDonlyA, Data[ID] ) )
RETURN
    MINX ( _newtable, Data[Start] )

If this post helps, then please consider accepting it as the solution to help other members find it faster, and give a big thumbs up.


Go to My LinkedIn Page


Hi @Jihwan_Kim,

 

thanks for the solution! I got an additional request and need the ID/IDs according to this MIN value. Tried SELECTEDVALUE with FILTER regarding minx. But it does not work.   

 

Any help is appreciated, thanks! 

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