[[esql-mv_count]]
=== `MV_COUNT`
Converts a multivalued field into a single valued field containing a count of the number
of values:

[source,esql]
----
include::{esql-specs}/string.csv-spec[tag=mv_count]
----

Returns:

[%header,format=dsv,separator=|]
|===
include::{esql-specs}/string.csv-spec[tag=mv_count-result]
|===

NOTE: This function accepts all types and always returns an `integer`.