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8ac4ba751e
* Break out 'Limitations' into separate page * Add REST API docs * Restructure commands, functions, and operators refs * Add placeholder for getting started guide * Group 'Syntax', 'Metafields', and 'MV fields' under 'Language' * Add placeholder for Kibana page * Add link from landing page * Apply uniform formatting to ACOS, CASE, and DATE_PARSE function refs * Reword default LIMIT * Add support for COUNT(*) * Move 'Commands' and 'Functions and operators' to individual pages --------- Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
35 lines
976 B
Text
35 lines
976 B
Text
[discrete]
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[[esql-keep]]
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=== `KEEP`
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The `KEEP` command enables you to specify what columns are returned and the
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order in which they are returned.
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To limit the columns that are returned, use a comma-separated list of column
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names. The columns are returned in the specified order:
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[source.merge.styled,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=keep]
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----
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[%header.monospaced.styled,format=dsv,separator=|]
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|===
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include::{esql-specs}/docs.csv-spec[tag=keep-result]
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|===
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Rather than specify each column by name, you can use wildcards to return all
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columns with a name that matches a pattern:
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[source,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=keepWildcard]
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----
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The asterisk wildcard (`*`) by itself translates to all columns that do not
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match the other arguments. This query will first return all columns with a name
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that starts with an h, followed by all other columns:
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[source,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=keepDoubleWildcard]
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----
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