[role="xpack"]
[testenv="basic"]
[[sql-functions]]
== Functions and Operators

{es-sql} provides a comprehensive set of built-in operators and functions:

* <<sql-operators, Operators>>
** <<sql-operators-equality>>
** <<sql-operators-null-safe-equality>>
** <<sql-operators-inequality>>
** <<sql-operators-comparison>>
** <<sql-operators-between>>
** <<sql-operators-is-null>>
** <<sql-operators-in>>
** <<sql-operators-and>>
** <<sql-operators-or>>
** <<sql-operators-not>>
** <<sql-operators-plus>>
** <<sql-operators-subtract>>
** <<sql-operators-negate>>
** <<sql-operators-multiply>>
** <<sql-operators-divide>>
** <<sql-operators-remainder>>
** <<sql-operators-cast-cast>>
* <<sql-like-rlike-operators>>
** <<sql-like-operator>>
** <<sql-rlike-operator>>
* <<sql-functions-aggs>>
** <<sql-functions-aggs-avg>>
** <<sql-functions-aggs-count>>
** <<sql-functions-aggs-count-all>>
** <<sql-functions-aggs-count-distinct>>
** <<sql-functions-aggs-first>>
** <<sql-functions-aggs-last>>
** <<sql-functions-aggs-max>>
** <<sql-functions-aggs-min>>
** <<sql-functions-aggs-sum>>
** <<sql-functions-aggs-kurtosis>>
** <<sql-functions-aggs-mad>>
** <<sql-functions-aggs-percentile>>
** <<sql-functions-aggs-percentile-rank>>
** <<sql-functions-aggs-skewness>>
** <<sql-functions-aggs-stddev-pop>>
** <<sql-functions-aggs-sum-squares>>
** <<sql-functions-aggs-var-pop>>
* <<sql-functions-grouping>>
** <<sql-functions-grouping-histogram>>
* <<sql-functions-datetime-interval, Date-Time Operators>>
* <<sql-functions-current-date, Date-Time Functions>>
** <<sql-functions-current-date>>
** <<sql-functions-current-timestamp>>
** <<sql-functions-datetime-day>>
** <<sql-functions-datetime-dow>>
** <<sql-functions-datetime-doy>>
** <<sql-functions-datetime-dayname>>
** <<sql-functions-datetime-hour>>
** <<sql-functions-datetime-isodow>>
** <<sql-functions-datetime-isoweek>>
** <<sql-functions-datetime-minuteofday>>
** <<sql-functions-datetime-minute>>
** <<sql-functions-datetime-month>>
** <<sql-functions-datetime-monthname>>
** <<sql-functions-now>>
** <<sql-functions-datetime-second>>
** <<sql-functions-datetime-quarter>>
** <<sql-functions-today>>
** <<sql-functions-datetime-week>>
** <<sql-functions-datetime-year>>
** <<sql-functions-datetime-extract>>
* <<sql-functions-search>>
** <<sql-functions-search-match>>
** <<sql-functions-search-query>>
** <<sql-functions-search-score>>
* <<sql-functions-math>>
** <<sql-functions-math-abs>>
** <<sql-functions-math-cbrt>>
** <<sql-functions-math-ceil>>
** <<sql-functions-math-e>>
** <<sql-functions-math-exp>>
** <<sql-functions-math-expm1>>
** <<sql-functions-math-floor>>
** <<sql-functions-math-log>>
** <<sql-functions-math-log10>>
** <<sql-functions-math-pi>>
** <<sql-functions-math-power>>
** <<sql-functions-math-random>> 
** <<sql-functions-math-round>>
** <<sql-functions-math-sign>>
** <<sql-functions-math-sqrt>>
** <<sql-functions-math-truncate>>
** <<sql-functions-math-acos>>
** <<sql-functions-math-asin>>
** <<sql-functions-math-atan>>
** <<sql-functions-math-atan2>>
** <<sql-functions-math-cos>>
** <<sql-functions-math-cosh>>
** <<sql-functions-math-cot>>
** <<sql-functions-math-degrees>>
** <<sql-functions-math-radians>>
** <<sql-functions-math-sin>>
** <<sql-functions-math-sinh>>
** <<sql-functions-math-tan>>
* <<sql-functions-string>>
** <<sql-functions-string-ascii>>
** <<sql-functions-string-bit-length>>
** <<sql-functions-string-char>>
** <<sql-functions-string-char-length>>
** <<sql-functions-string-concat>>
** <<sql-functions-string-insert>>
** <<sql-functions-string-lcase>>
** <<sql-functions-string-left>>
** <<sql-functions-string-length>>
** <<sql-functions-string-locate>>
** <<sql-functions-string-ltrim>>
** <<sql-functions-string-octet-length>>
** <<sql-functions-string-position>>
** <<sql-functions-string-repeat>>
** <<sql-functions-string-replace>>
** <<sql-functions-string-right>>
** <<sql-functions-string-rtrim>>
** <<sql-functions-string-space>>
** <<sql-functions-string-substring>>
** <<sql-functions-string-ucase>>
* <<sql-functions-type-conversion>>
** <<sql-functions-type-conversion-cast>>
** <<sql-functions-type-conversion-convert>>
* <<sql-functions-conditional>>
** <<sql-functions-conditional-coalesce>>
** <<sql-functions-conditional-greatest>>
** <<sql-functions-conditional-ifnull>>
** <<sql-functions-conditional-isnull>>
** <<sql-functions-conditional-least>>
** <<sql-functions-conditional-nullif>>
** <<sql-functions-conditional-nvl>>
* <<sql-functions-system>>
** <<sql-functions-system-database>>
** <<sql-functions-system-user>>

include::operators.asciidoc[]
include::like-rlike.asciidoc[]
include::aggs.asciidoc[]
include::grouping.asciidoc[]
include::date-time.asciidoc[]
include::search.asciidoc[]
include::math.asciidoc[]
include::string.asciidoc[]
include::type-conversion.asciidoc[]
include::conditional.asciidoc[]
include::system.asciidoc[]