Forum Discussion
Power query Remove Duplicates with two sorting tables
Hi Anonymous
You can use Group By and adjust the code like below.
let Source = Table, #"Grouped Rows" = Table.Group(Source, {"Case"}, {{"tbl", ( rows ) => let sort = Table.Sort( rows ,{{ "key 1", Order.Ascending}, {"Key 2", Order.Ascending}}), topRow = Table.FirstN( sort , 1) in topRow, type table [key 1=number, Key 2=number]}}), #"Expanded tbl" = Table.ExpandTableColumn(#"Grouped Rows", "tbl", {"key 1", "Key 2"}, {"key 1", "Key 2"}) in #"Expanded tbl"Best Regards,
Mariusz
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Hello Anonymous
Sorting has no impact on a distinct-function.
The distinct funciton only takes 2 arguments, the table to get distinct values of and a optional equationcriteria. In the second parameter however you can specify how the different rows are compared. If you specifiy a column like {"YourColumn"} (as in your first example), the distinct is checked only in this columns. You can also apply a custom-function to check whether a value should be set as distinct or not.
In your case simple sort the table first and in an addition step apply a Table.Distinct without second parameter
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Jimmy
Hi Anonymous
there is a really nasty trap in the sort-function, especially when applied before removing duplicates: https://community.powerbi.com/t5/Community-Blog/Bug-warning-for-Table-Sort-and-removing-duplicates-in-Power/ba-p/810390
So you have to apply a buffer on your sort-result before applying the distinct.