distinct() function

distinct() returns all unique values in a specified column.

The _value of each output record is set to a distinct value in the specified column. null is considered its own distinct value if present.

Function type signature
(<-tables: stream[A], ?column: string) => stream[B] where A: Record, B: Record
For more information, see Function type signatures.



Column to return unique values from. Default is _value.


Input data. Default is piped-forward data (<-).


Return distinct values from the _value column

import "sampledata"
    |> distinct()

View example input and output

Return distinct values from a non-default column

import "sampledata"
    |> distinct(column: "tag")

View example input and output

Return distinct values from data with null values

import "sampledata" true)
    |> distinct()

View example input and output

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