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34 lines
965 B
Text
34 lines
965 B
Text
[[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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