topic Re: DAX measure to filter a table in DAX Commands and Tips

DAX measure to filter a table

mizaskun — Thu, 07 Oct 2021 13:16:36 GMT

Good afternoon,

I have two tables: a sales table and a table with some data to filter the sales table. This architecture is a must.

The idea is to filter the sales table depending on the filter applied on the permission table, which gets automatically filtered when starting the report.

SALES TABLE

# | Price | User | Shop

1 | 10 € | A | Paris

2 | 12 € | A | Bordeaux

3 | 11 € | B | Rome

4 | 10 € | C | Paris

PERMISSION TABLE

USER | ACCESS | TYPE

A | A | user

B | B | user

C | C | user

C | Paris | shop

So that user A would see sale n1 and sale n2. User B would see sale n3 and user C would see sale n1, sale n4.

The idea is to calculate it dinamically. Thus, I need this to be done on DAX with a measure. I was thinking to calculate an "X" if the user or the shop is found in the permission table, and filter the sales table by "X".

Any idea on how to do this?

I cannot use a DAX table due to the fact that it needs an update of the report to get updated.

Thank you so much!

Re: DAX measure to filter a table

colacan — Thu, 07 Oct 2021 14:15:57 GMT

mizaskun Hi,

I assume the permission table and sales table is related as 1:m by the User

If I explain based on your table, you may create basic mearues which you need, like sum of price or average price

Sum_Price = sum(Sales[Price])

AVG_Price = average(Sales[Price])

Then, the filtered calculation based on user would be as below;

Sum_Price_PerUser =

IF(HASONEVALUE(Permission[User]),

CALCULATE([Sum_Price],

FILTER(Sales,related(Permission[User]) = SELECTEDVALUE(Permission[User])

)

BLANK()

)

By simply replacing the basic measure from [Sum_price] to [AVG_Price] you can get user-filtered average price as below

Avr_Price_PerUser =

IF(HASONEVALUE(Permission[User]),

CALCULATE([AVG_Price],

FILTER(Sales,related(Permission[User]) = SELECTEDVALUE(Permission[User])

)

BLANK()

)

These measure will show blank if there is no specific user selected from Permission table.

Thanks

Please mark this as solution if this helped.

Re: DAX measure to filter a table

mizaskun — Thu, 07 Oct 2021 14:40:24 GMT

The relation is **, many to many. Any other way to achieve this?

Thanks!

Re: DAX measure to filter a table

colacan — Thu, 07 Oct 2021 14:46:26 GMT

It is strongly recommended to make the the permission table has unique user. it is to prevent any unexpected error in the future as well. if you can not change exisitng permission table, it's better to create one and relates it to both sales table and existing table as 1:m (in case you need exisitng permission table in the future)

Re: DAX measure to filter a table

mizaskun — Thu, 07 Oct 2021 14:59:27 GMT

How could I do a user to see his sales & the sales of the shops he owns? thanks!

Re: DAX measure to filter a table

colacan — Thu, 07 Oct 2021 17:27:37 GMT

mizaskun Hi, based on your sample data (I have to depend on it to answer your question since this is the only source with which I can understand your issue) I can see the shop is in the sales table already. in that can each user can see their number by shop by simply adding Sales[shop] in the visual as below;

Re: DAX measure to filter a table

mizaskun — Fri, 08 Oct 2021 07:05:57 GMT

Hi colacan

I finally did it with the following measure:

Valid =

min(

calculate(

distinctcount(SALES[sn]),

USERELATIONSHIP(SALES[shop], PERMISSION[access])

)

calculate(

distinctcount(SALES[sn]),

USERELATIONSHIP(SALES[user], PERMISSION[access])

)

, 1)

This makes the rows to be seen get a 1, and the rows with no permission disapear.