select
Selects fields from the input.
Synopsis
select <extractor>...
Description
The select
operator keeps only the fields matching the provided extractors and
removes all other fields. It is the dual to drop
.
In relational algebra, select
performs a projection of the provided
arguments.
<extractor>...
A comma-separated list of extractors that identify the fields to keep.
Examples
Only keep fields foo
and bar
:
select foo, bar
Select all fields of type ip
:
select :ip