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dgreen1's avatar
dgreen1
Frequent Visitor
2 years ago
Solved

Help Understanding DAX Formula: RANKX With EARLIER

I took over a partially completed project from someone that is no longer with the company. Could you help explain what this formula is doing/how it works?

= RANKX(FILTER(Table,Append1[IDNumber]=EARLIER(Table[IDNumber])),Table[MonthStart],,DESC,Dense)
  • ValtteriN's avatar
    ValtteriN
    2 years ago

    Hi,

    RANKX ranks the values given in the filter context. In your case the values of [MonthStart] column are ranked in desceding order. Additional condition is that the IDNumber must match the id of the current row. Dense makes it so that there aren't any gaps in ranking order.


    I hope this post helps to solve your issue and if it does consider accepting it as a solution and giving the post a thumbs up!

    My LinkedIn: https://www.linkedin.com/in/n%C3%A4ttiahov-00001/

2 Replies

  • ValtteriN's avatar
    ValtteriN
    Community Champion
    2 years ago

    Hi,

    RANKX ranks the values given in the filter context. In your case the values of [MonthStart] column are ranked in desceding order. Additional condition is that the IDNumber must match the id of the current row. Dense makes it so that there aren't any gaps in ranking order.


    I hope this post helps to solve your issue and if it does consider accepting it as a solution and giving the post a thumbs up!

    My LinkedIn: https://www.linkedin.com/in/n%C3%A4ttiahov-00001/

    • dgreen1's avatar
      dgreen1
      Frequent Visitor
      2 years ago

      So in this case the most recent month for an ID without a match gets a 1, the preceding month where that ID existed gets a 2, and so on?