> ## Documentation Index > Fetch the complete documentation index at: https://docs.e6data.com/llms.txt > Use this file to discover all available pages before exploring further. # SQL functions > Every SQL function Query Engine supports, grouped by category, with syntax, arguments, return values and examples. Query Engine supports 363 SQL functions. Each has its own page with syntax, arguments, return type, NULL behaviour and runnable examples. Search for a function by name with the search bar, or browse by category. 63 functions. Search, slice, combine, pad, format and transform text. 53 functions. Arithmetic, rounding, logarithmic, trigonometric and other numeric functions. 78 functions. Build, convert, format, extract from and do arithmetic on dates, times and timestamps. 48 functions. Compute one result from a set of rows, such as a sum, count, average or approximate distinct count. Most can also run as window functions. 7 functions. Rank rows and read values from neighbouring rows within a window. Aggregate functions can also run over windows. 23 functions. Branch on conditions, handle NULLs, cast between types and read session context. 34 functions. Build, inspect, transform and flatten arrays. 7 functions. Build maps and read their keys, values and entries. 2 functions. Build structs (records with named fields). 12 functions. Parse JSON, extract values from it and build JSON output. 8 functions. Match, extract and replace text with regular expressions. 5 functions. Compute checksums and cryptographic digests. 13 functions. Operate on the individual bits of integers. 1 functions. Work with bitmaps. 9 functions. Functions that return rows instead of a single value, such as exploding arrays or generating ranges. H3 and spatial functions for points, coordinates and polygons. For equivalents of these functions in other SQL engines, see [Equivalent functions and operators](/query/sql/function-mapping). This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.