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* 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>
38 lines
1.1 KiB
Text
38 lines
1.1 KiB
Text
[discrete]
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[[esql-substring]]
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=== `SUBSTRING`
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Returns a substring of a string, specified by a start position and an optional
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length. This example returns the first three characters of every last name:
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[source.merge.styled,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=substring]
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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=substring-result]
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|===
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A negative start position is interpreted as being relative to the end of the
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string. This example returns the last three characters of of every last name:
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[source.merge.styled,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=substringEnd]
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----
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[%header.monospaced.styled,format=dsv,separator=|]
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include::{esql-specs}/docs.csv-spec[tag=substringEnd-result]
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|===
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If length is omitted, substring returns the remainder of the string. This
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example returns all characters except for the first:
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[source.merge.styled,esql]
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----
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include::{esql-specs}/docs.csv-spec[tag=substringRemainder]
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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=substringRemainder-result]
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|===
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