# YQL - Overview

*YQL* (Yandex Query Language) — is a universal declarative query language for distributed systems of data storage and processing, a dialect of SQL.

This documentation section contains the YQL reference that includes the sections:

- [Data types](types/index.md) with a description of data types used in YQL
- [Syntax](syntax/index.md) with a full list of YQL commands
- [Built-in functions](builtins/index.md) with a description of the available built-in functions
- [Recipes](recipes/index.md) with a description of recipes for various tasks