tail() function

tail() limits each output table to the last n rows.

tail() produces one output table for each input table. Each output table contains the last n records before the offset. If the input table has less than offset + n records, tail() outputs all records before the offset.

Function type signature

(<-tables: stream[A], n: int, ?offset: int) => stream[A]

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Parameters

n

({{< req >}}) Maximum number of rows to output.

offset

Number of records to skip at the end of a table table before limiting to n. Default is 0.

tables

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

Examples

• Output the last three rows in each input table
• Output the last three rows before the last row in each input table

Output the last three rows in each input table

import "sampledata"

sampledata.int()
    |> tail(n: 3)

{{< expand-wrapper >}} {{% expand "View example input and output" %}}

Input data

Output data

{{% /expand %}} {{< /expand-wrapper >}}

Output the last three rows before the last row in each input table

import "sampledata"

sampledata.int()
    |> tail(n: 3, offset: 1)

{{< expand-wrapper >}} {{% expand "View example input and output" %}}

Input data

Output data

{{% /expand %}} {{< /expand-wrapper >}}