docs-v2/content/flux/v0/stdlib/experimental/last.md

title	description	menu	weight	flux/v0/tags	introduced
experimental.last() function	`experimental.last()` returns the last record with a non-null value in the `_value` column for each input table.	flux_v0_ref name parent identifier experimental.last experimental experimental/last	101	transformations selectors	0.112.0

experimental.last() returns the last record with a non-null value in the _value column for each input table.

experimental.last() drops empty tables.

Function type signature

(<-tables: stream[{A with _value: B}]) => stream[{A with _value: B}]

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Parameters

tables

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

Examples

Return the last non-null value in each input table

import "experimental"
import "sampledata"

sampledata.int(includeNull: true)
    |> experimental.last()

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Input data

_time	_value	*tag
2021-01-01T00:00:00Z	-2	t1
2021-01-01T00:00:10Z		t1
2021-01-01T00:00:20Z	7	t1
2021-01-01T00:00:30Z		t1
2021-01-01T00:00:40Z		t1
2021-01-01T00:00:50Z	4	t1

_time	_value	*tag
2021-01-01T00:00:00Z		t2
2021-01-01T00:00:10Z	4	t2
2021-01-01T00:00:20Z	-3	t2
2021-01-01T00:00:30Z	19	t2
2021-01-01T00:00:40Z		t2
2021-01-01T00:00:50Z	1	t2

Output data

_time	_value	*tag
2021-01-01T00:00:50Z	4	t1

_time	_value	*tag
2021-01-01T00:00:50Z	1	t2

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