Forum Discussion
Count the Variable when it appear the first time
Hi, i have a table with many variables and it have duplicates, what i want to do is to have count for the variable when it appear the first time and does not count the variable when is appear the second time onwards.
| Var | Var | Count | |
| A | A | 1 | |
| A | A | null | |
| B | B | 1 | |
| B | B | null | |
| C | C | 1 | |
| D | D | 1 |
Hi again,
Yes, it is possible please follow these few steps (after adding index column):
1. Group by with counting all rows:2. Expand only index
3. Add a conditional column
4. remove unnecessary columns
RESULT :If this post helps, then please consider Accepting it as the solution to help the other members find it more quickly.
5 Replies
Hi Yqy
You can achieve it with 2steps :
1 . In PQ add the index column:2. In the Data editor add a column with this Dax:
first occurrence check =IF (CALCULATE (COUNTROWS ( 'Table' ),FILTER (ALLEXCEPT ( 'Table','Table'[Var]),'Table'[Index] <= EARLIER ( 'Table'[Index] )))> 1,blank(),1)If this post helps, then please consider Accepting it as the solution to help the other members find it more quickly.
Hi, is it possible to do the second step in Query using M language instead of in the data editor using DAX
Hi again,
Yes, it is possible please follow these few steps (after adding index column):
1. Group by with counting all rows:2. Expand only index
3. Add a conditional column
4. remove unnecessary columns
RESULT :If this post helps, then please consider Accepting it as the solution to help the other members find it more quickly.
