39 lines
845 B
Plaintext
39 lines
845 B
Plaintext
[discrete]
|
|
[[esql-greatest]]
|
|
=== `GREATEST`
|
|
|
|
*Syntax*
|
|
|
|
[.text-center]
|
|
image::esql/functions/signature/greatest.svg[Embedded,opts=inline]
|
|
|
|
*Parameters*
|
|
|
|
`first`::
|
|
First of the columns to evaluate.
|
|
|
|
`rest`::
|
|
The rest of the columns to evaluate.
|
|
|
|
*Description*
|
|
|
|
Returns the maximum value from multiple columns. This is similar to <<esql-mv_max>>
|
|
except it is intended to run on multiple columns at once.
|
|
|
|
NOTE: When run on `keyword` or `text` fields, this returns the last string
|
|
in alphabetical order. When run on `boolean` columns this will return
|
|
`true` if any values are `true`.
|
|
|
|
include::types/greatest.asciidoc[]
|
|
|
|
*Example*
|
|
|
|
[source.merge.styled,esql]
|
|
----
|
|
include::{esql-specs}/math.csv-spec[tag=greatest]
|
|
----
|
|
[%header.monospaced.styled,format=dsv,separator=|]
|
|
|===
|
|
include::{esql-specs}/math.csv-spec[tag=greatest-result]
|
|
|===
|