[discrete]
[[esql-agg-sum]]
=== `SUM`

*Syntax*

[source,esql]
----
SUM(expression)
----

`expression`::
Numeric expression.

*Description*

Returns the sum of a numeric expression.

*Example*

[source.merge.styled,esql]
----
include::{esql-specs}/stats.csv-spec[tag=sum]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/stats.csv-spec[tag=sum-result]
|===

The expression can use inline functions. For example, to calculate
the sum of each employee's maximum salary changes, apply the
`MV_MAX` function to each row and then sum the results:

[source.merge.styled,esql]
----
include::{esql-specs}/stats.csv-spec[tag=docsStatsSumNestedExpression]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/stats.csv-spec[tag=docsStatsSumNestedExpression-result]
|===