> For the complete documentation index, see [llms.txt](https://docs.e6data.com/ingestion-engine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.e6data.com/ingestion-engine/sql/functions.md).

# Scalar functions

e6 Ingestion Engine provides a comprehensive set of built-in SQL functions powered by Apache DataFusion.

## Function Categories

* [Text Functions](/ingestion-engine/sql/functions/text.md) - String manipulation and pattern matching
* [Math Functions](/ingestion-engine/sql/functions/math.md) - Mathematical and numeric operations
* [Date & Time Functions](/ingestion-engine/sql/functions/datetime.md) - Timestamp and temporal operations
* [JSON Functions](/ingestion-engine/sql/functions/json.md) - JSON parsing and querying
* [Array Functions](/ingestion-engine/sql/functions/array.md) - Array manipulation
* [Struct Functions](/ingestion-engine/sql/functions/struct.md) - Struct field access and manipulation
* [Regex Functions](/ingestion-engine/sql/functions/regex.md) - Regular expression operations
* [Conditional Functions](/ingestion-engine/sql/functions/conditional.md) - Conditional logic and null handling
* [Hashing Functions](/ingestion-engine/sql/functions/hashing.md) - Hash computation
* [Binary String Functions](/ingestion-engine/sql/functions/binary.md) - Binary data operations
* [Other Functions](/ingestion-engine/sql/functions/other.md) - Miscellaneous functions
* [Aggregate Functions](/ingestion-engine/sql/aggregate-and-window-functions/aggregates.md) - Functions for computing over groups (SUM, AVG, COUNT, etc.)
* [Window Functions](/ingestion-engine/sql/aggregate-and-window-functions/window.md) - OVER-clause analytical functions (ROW\_NUMBER, LAG, LEAD, etc.)


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