topic Re: I have a sql query that I'd like to code in dax, how can I achieve this? in DAX Commands and Tips

I have a sql query that I'd like to code in dax, how can I achieve this?

brickanalyst — Wed, 19 Jun 2024 17:37:32 GMT

Hello there,

Before I come here and ask this question. I asked chatgpt 3.5 to answer my question and I didn't like its answer.

Suppose we have a basic sql query here below:

SELECT bt.file_hash, bt.project_code, (y.cat1_cost - bt.cat1_cost ) / bt.cat1_cost AS variance_cat1_cost FROM bluetable as bt INNER JOIN yellowtable as y ON bt.file_hash = y.file_hash and bt.cat10 = y.cat10 GROUP BY bt.file_hash, bt.project_code

and I get this answer below:

EVALUATE SUMMARIZECOLUMNS ( bt[file_hash], bt[project_code], "variance_cat1_cost", DIVIDE ( (SUM ( y[cat1_cost] ) - SUM ( bt[cat1_cost] )), SUM ( bt[cat1_cost] )) )

and it says you don't have to specificy join condition because power bi it's based on common columns.
I doesn't make any sense, this is my join and that's how I get unique records.

Can someone explain me or guide me how I can create a calculated table with dax with aggregation included?
any video, link or code please.

Thanks!

Re: I have a sql query that I'd like to code in dax, how can I achieve this?

jgeddes — Wed, 19 Jun 2024 20:10:18 GMT

The answer you got would rely on a relationship being in place between the two tables.
Here is a link to an article that explains join functions in DAX.
https://www.sqlbi.com/articles/using-join-functions-in-dax/

and a link to the NATURALINNERJOIN DAX function

https://learn.microsoft.com/en-us/dax/naturalinnerjoin-function-dax

Hope this gets you pointed in the right direction.

Re: I have a sql query that I'd like to code in dax, how can I achieve this?

brickanalyst — Thu, 15 Aug 2024 20:47:00 GMT

jgeddes Sorry for late response, I went with sql query so that I couldn load any way that I wanted.
However, we could do distinct column (mutual) to create a table and adding other columns with RELATED function to find corresponding value on the second table, so that I could use this as completing the third table.

These two article are helpful to get the columns you like and join them together, but in my case I needed to do something different.

Edit: I found this article, I believe if I digged into this I could've found my solution on your approach as well.
https://www.sqlbi.com/articles/from-sql-to-dax-joining-tables/

Thanks again!