.. meta::
   :description: ksqlDB is an event streaming database purpose-built to help developers create stream processing applications on top of Apache Kafka.

.. _ksql_home:

|ksqldb|
########

|ksqldb| is an event streaming database purpose-built to help developers create
stream processing applications on top of |ak-tm|.

|ksqldb| quick start
********************

- Try |ksqldb| Standalone with `Docker images <https://ksqldb.io/quickstart.html>`__.
- Get started with hosted |ksqldb| in |ccloud| in the: `Quick Start for Apache Kafka using Confluent Cloud <https://docs.confluent.io/cloud/current/get-started/index.html>`__.
- Run |ksqldb| locally with |cp| in the :ref:`quickstart`.
 
|ksqldb| Standalone and |ksqldb| for |cp| 
*****************************************

These are the |ksqldb| distributions: 

|ksqldb| Standalone
  |ksqldb| Standalone is an open-source project that's licensed under the
  `Confluent Community License <https://github.com/confluentinc/ksql/blob/master/LICENSE>`__.
  You can install it by using the 
  `ksqldb-server <https://hub.docker.com/r/confluentinc/ksqldb-server>`__
  and `ksqldb-cli <https://hub.docker.com/r/confluentinc/ksqldb-cli>`__
  Docker images. For more information, see
  :ksqldb-docs:`Install ksqlDB|operate-and-deploy/installation/`  
  in the :ksqldb-docs:`ksqlDB Standalone documentation|`.

|ksqldb| for |cp|
  |ksqldb| for |cp| is packaged as part of |cp|. |commercial| |ksqldb| for |cp|
  includes enterprise features, like :ref:`role-based access control <ksql-rbac>`,
  and is available in `Confluent Cloud <https://docs.confluent.io/cloud/current/get-started/ksql.html>`__.
  You can install it by using the 
  `cp-ksqldb-cli <https://hub.docker.com/r/confluentinc/cp-ksqldb-cli>`__ and
  `cp-ksqldb-server <https://hub.docker.com/r/confluentinc/cp-ksqldb-server>`__
  Docker images or by using TAR, ZIP, or Systemd deployments. For more information,
  see :ref:`On-Premises Deployments <installation>`.

The following table summarizes the distributions.

+--------------------+----------------------+---------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------+------------------------------+
|                    | Project Type         | License                                                                                     | Docker Images                                                                                         | TAR, ZIP, Systemd deployment |
+====================+======================+===============================+=============================================================+=======================================================================================================+==============================+
| |ksqldb| Standalone| Open source          | `Confluent Community License <https://github.com/confluentinc/ksql/blob/master/LICENSE>`__  | - `ksqldb-server <https://hub.docker.com/r/confluentinc/ksqldb-server>`__                             | n/a                          |
|                    |                      |                                                                                             | - `ksqldb-cli <https://hub.docker.com/r/confluentinc/ksqldb-cli>`__                                   |                              |
|                    |                      |                                                                                             |                                                                                                       |                              |
|                    |                      |                                                                                             |   For more information, see                                                                           |                              |
|                    |                      |                                                                                             |   :ksqldb-docs:`Install ksqlDB|operate-and-deploy/installation/installing/`.                          |                              |
+--------------------+----------------------+---------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------+------------------------------+
| |ksqldb| for |cp|  | Packaged with |cp|   | |commercial|                                                                                | - `cp-ksqldb-server <https://hub.docker.com/r/confluentinc/cp-ksqldb-server>`__                       | :ref:`installation`          |
|                    |                      |                                                                                             | - `cp-ksqldb-cli <https://hub.docker.com/r/confluentinc/cp-ksqldb-cli>`__                             |                              |
|                    |                      |                                                                                             |                                                                                                       |                              |
|                    |                      |                                                                                             |   For more information, see :ref:`image_reference`.                                                   |                              |
+--------------------+----------------------+---------------------------------------------------------------------------------------------+-------------------------------------------------------------------------------------------------------+------------------------------+

Contents
********

.. toctree::
   :maxdepth: 2

   ksqlDB Quickstart <https://ksqldb.io/quickstart.html>
   Install ksqlDB <installing>
   Operate ksqlDB <operations>
   Upgrade ksqlDB <upgrading>
   Develop applications for ksqlDB <https://docs.ksqldb.io/en/latest/developer-guide/>
   Run ksqlDB in Confluent Cloud <https://docs.confluent.io/cloud/current/get-started/ksql.html>
   Connect ksqlDB to Confluent Cloud <https://docs.confluent.io/cloud/current/cp-component/ksql-cloud-config.html>
   cloud-ksql-migration-guide
   Run ksqlDB in Confluent Control Center <../control-center/ksql>
   Connect ksqlDB to Confluent Control Center <integrate-ksql-with-confluent-control-center>
   Secure ksqlDB with RBAC <../security/rbac/ksql-rbac>
   faq
   troubleshoot-ksql
   tutorials/index
   

Recommended Resources
*********************

- `Video: Confluent Platform 5.5 - What's New in ksqlDB <https://youtu.be/eDl2eQ9Pcb4?t=309>`__
- `KSQL ratings demo <https://github.com/confluentinc/demo-scene/blob/master/ksql-workshop/ksql-workshop.adoc>`__
- `Stream data from Postgres into Elasticsearch <https://github.com/confluentinc/examples/tree/master/postgres-debezium-ksql-elasticsearch>`__