仅获取 Kusto 查询语言（Azure Monitor 日志）中的类别中的唯一值

Question

I have data in this format:

Category Session_ID  Step_Name

  A         100        1
  A         100        2 
  A         200        1
  A         200        1    <--
  A         200        1    <--
  A         200        2
  B         300        1
  B         300        1    <--

I need to remove the duplicate values of step names within each Session_ID . For example in ID = 200, there are three '1's which need to be changed to one '1', so the final data looks like:

Category Session_ID  Step_Name

  A         100        1
  A         100        2 
  A         200        1
  A         200        2
  B         300        1

Answer 1

You should use distinct operator in your case:

your_table
| distinct Category, Session_ID, Step_Name

then you can get the expected output like below, it works at my side:

Category Session_ID  Step_Name

  A         100        1
  A         100        2 
  A         200        1
  A         200        2
  B         300        1

And for your question in the comment, if you use the above query, the record like "A 100 1" would consider as one entity, and only if there are 2 or more exact same record like "A 100 1" would remain only 1 record if using distinct.

And if there is another record like "B 100 1", then the both 2 records "A 100 1" and "B 100 1" would remain.