Documentation

getColumn() function

getColumn() extracts a specified column from a table as an array.

If the specified column is not present in the table, the function returns an error.

Function type signature
(<-table: stream[A], column: string) => [B] where A: Record
  • Copy
  • Fill window

For more information, see Function type signatures.

Parameters

column

(Required) Column to extract.

table

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

Examples

Extract an array of column values from a table

import "sampledata"

sampledata.int()
    |> tableFind(fn: (key) => key.tag == "t1")
    |> getColumn(column: "_value")// Returns [-2, 10, 7, 17, 15, 4]
  • Copy
  • Fill window

Extract an array of column values and display them in a table

import "array"
import "sampledata"

columnData =
    sampledata.int()
        |> tableFind(fn: (key) => key.tag == "t1")
        |> getColumn(column: "_value")

array.from(rows: [{_value: display(v: columnData)}])
  • Copy
  • Fill window

Was this page helpful?

Thank you for your feedback!


The future of Flux

Flux is going into maintenance mode. You can continue using it as you currently are without any changes to your code.

Read more

New in InfluxDB 3.3

Key enhancements in InfluxDB 3.3 and the InfluxDB 3 Explorer 1.1.

See the Blog Post

InfluxDB 3.3 is now available for both Core and Enterprise, which introduces new managed plugins for the Processing Engine. This makes it easier to address common time series tasks with just a plugin. InfluxDB 3 Explorer 1.1 is also available, which includes InfluxDB plugin management and other new features.

For more information, check out: