# Connecting to a database

Available in...

* Big Data Platform
* Cloud API Services Platform
* Cloud Big Data Platform
* Cloud Data Fabric
* Cloud Data Management Platform
* Data Fabric
* Data Management Platform
* Data Services Platform
* Qlik Talend Cloud Enterprise Edition
* Qlik Talend Cloud Premium Edition
* Real-Time Big Data Platform

Before proceeding to analyze data in a specific database, set up the connection to this database. You can create a connection on the DataBase Management System (DBMS) and show database content.

For more information about the supported databases for profiling data, see .

Connections to different databases are reflected by different tree levels and different icons in the DQ repository tree view because the logical and physical structure of data differs from one relational database to another. The highest level structure "Catalog" followed by "Schema" and finally by "Table" is not applicable to all database types.

For further information, see [Catalogs and schemas in database systems](https://help.qlik.com/talend/en-US/studio-user-guide/8.0/catalogs-and-schemas-in-database-systems).

### In this section

* [Creating a connection](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/creating-connection)
* [What databases are supported from the Profiling perspective](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/what-databases-are-supported-from-profiling-perspective)
* [What you need to know about some databases](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/what-you-need-to-know-about-some-databases)
* [Catalogs and schemas in database systems](https://help.qlik.com/talend/en-US/studio-user-guide/8.0-R2026-09/catalogs-and-schemas-in-database-systems)