32 lines
509 B
Plaintext
32 lines
509 B
Plaintext
[discrete]
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[[esql-coalesce]]
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=== `COALESCE`
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*Syntax*
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[source,esql]
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----
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COALESCE(expression1 [, ..., expressionN])
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----
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*Parameters*
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`expressionX`::
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Expression to evaluate.
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*Description*
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Returns the first of its arguments that is not null. If all arguments are null,
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it returns `null`.
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*Example*
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[source.merge.styled,esql]
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----
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include::{esql-specs}/null.csv-spec[tag=coalesce]
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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}/null.csv-spec[tag=coalesce-result]
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|===
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