topic Help Understanding DAX Formula: RANKX With EARLIER in DAX Commands and Tips

Help Understanding DAX Formula: RANKX With EARLIER

dgreen1 — Fri, 29 Dec 2023 14:38:59 GMT

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)

Re: Help Understanding DAX Formula: RANKX With EARLIER

ValtteriN — Fri, 29 Dec 2023 15:04:55 GMT

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.

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Re: Help Understanding DAX Formula: RANKX With EARLIER

dgreen1 — Fri, 29 Dec 2023 15:37:48 GMT

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?