> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ocient.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Query Ocient

export const PostgreSQL = "PostgreSQL®";

export const OcientDataIntelligencePlatform = "OcientAIQ™ Unified Data Platform";

export const Ocient = "Ocient®";

The {OcientDataIntelligencePlatform} contains one or more SQL relational databases. {Ocient} follows the {PostgreSQL} dialect closely, and most functions operate the same in Ocient as in PostgreSQL. You can use the `SELECT` SQL statement to query data. For details, see the [Data Query Language (DQL) Statement Reference](/data-query-language-dql-statement-reference).

* [Quick Start Querying](/quick-start-querying)
* [Query Performance Tuning](/query-performance-tuning)
* [Ocient HTTP Query API](/ocient-http-query-api)
* [Understanding Data Types](/understanding-data-types)
  * [Array, Tuple, and Matrix Overview](/array-tuple-and-matrix-overview)
* [Functions Overview](/functions-overview)