Filter rows by max date keeping ID

Hi neilmc ,

According to your description, here are my steps you can follow as a solution.

(1) My test data is the same as yours.

(2) We can create a table.

Table 2 = 
var _a=ADDCOLUMNS('Table',"max", CALCULATE(MAX('Table'[StartDate]),FILTER('Table','Table'[PerID]=EARLIER('Table'[PerID]))))
var _b= FILTER(_a,[StartDate]=[max]) 
return SELECTCOLUMNS(_b,"PerID",[PerID],"DBID",[DBID],"StartDate",[StartDate])

(3) Then the result is as follows.

Best Regards,

Neeko Tang

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