# Functions
<a name="sql-reference-functions"></a>

The topics in this section describe functions supported by streaming SQL.

**Topics**
+ [Aggregate Functions](sql-reference-aggregate-functions.md)
+ [Analytic Functions](sql-reference-analytic-functions.md)
+ [Boolean Functions](sql-reference-boolean-functions.md)
+ [Conversion Functions](sql-reference-conversion-functions.md)
+ [Date and Time Functions](sql-reference-date-time-functions.md)
+ [Null Functions](sql-reference-null-functions.md)
+ [Numeric Functions](sql-reference-numeric-functions.md)
+ [Log Parsing Functions](sql-reference-pattern-matching-functions.md)
+ [Sorting Functions](sql-reference-sorting-functions.md)
+ [Statistical Variance and Deviation Functions](sql-reference-statistical-variance-deviation-functions.md)
+ [Streaming SQL Functions](sql-reference-streaming-sql-functions.md)
+ [String and Search Functions](sql-reference-string-and-search-functions.md)