Power BI is turning 10, and we’re marking the occasion with a special community challenge. Use your creativity to tell a story, uncover trends, or highlight something unexpected.
Get startedJoin us for an expert-led overview of the tools and concepts you'll need to become a Certified Power BI Data Analyst and pass exam PL-300. Register now.
Hello,
Im confused about something , i would appreciate if someone demystify it
First question :
Does using related function inside an iterator create a transition context ?
Second question :
When creating nested iterators , first iterator im on row number 1 ,
Does the nested iterator knows the location of the outer iterator ans thus the nested iterator will be filtered based on the row context of the first iterator ?
Hope my 2 questions makes sense
Thanks for any explanation
Solved! Go to Solution.
Hi, @Daniel29195
As I understand it, the inner iteration function returns a new table, and the outer iteration continues to iterate over the new table generated internally.
For more information, you can refer to :
Iteration in DAX - Microsoft Power BI Community
Best Regards,
Aniya Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly
Hi , @Daniel29195
Here are my understand about your question:
Q1:Does using related function inside an iterator create a transition context ?
The RELATED() function just retun a related value from another table. The RELATED function needs a row context; therefore the function often uses in the calculated column and we can use SUMX, SELECTCOLUMNS function to create a row context.
Q2:Does the nested iterator knows the location of the outer iterator ans thus the nested iterator will be filtered based on the row context of the first iterator ?
For nested iterators, this is mainly to look at the order of evaluation. Usually iterators such as FILTER(), SUMX() and other functions are iteration functions, when we use nested iterations, such as SUMX(FILTER()), then generally the FILTER() function is evaluated first, and then a table is returned, and then SUMX() iteration is performed on the generated table.
Best Regards,
Aniya Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly
Hello @v-yueyunzh-msft ,
What i meant in my questions,
What is happening behind the scenes
For the 2 questions
Like does the table in the inner iteration gets filtered by the row value of the first iteration ?
If not, then what is the logic ?
Hi, @Daniel29195
As I understand it, the inner iteration function returns a new table, and the outer iteration continues to iterate over the new table generated internally.
For more information, you can refer to :
Iteration in DAX - Microsoft Power BI Community
Best Regards,
Aniya Zhang
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly
This is your chance to engage directly with the engineering team behind Fabric and Power BI. Share your experiences and shape the future.
Check out the June 2025 Power BI update to learn about new features.
User | Count |
---|---|
10 | |
9 | |
8 | |
7 | |
6 |
User | Count |
---|---|
14 | |
13 | |
11 | |
9 | |
8 |