# Catalogs and schemas in database systems

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

The structure of a database defines how objects are organized in the database. Different data storage structures are used to store objects in databases. For example, the highest-level structure "Catalog">"Schema">"Table" is not applicable to all database types.

| Database name | Version | Catalog | Schema |
| --- | --- | --- | --- |
| AS/400 | V5R4 | Supported | Supported |
| DB2 | All versions | Not supported | Supported |
| DB2 ZOS | All versions | Not supported | Supported |
| Informix | All versions | Supported | Supported |
| Microsoft SQL Server | All versions | Supported | Supported |
| MySQL | All versions | Supported | Not supported |
| Netezza | All versions | Supported | Supported |
| Oracle | All versions | Not supported | Supported |
| PointBase | All versions | Not supported | Supported |
| PostgreSQL | All versions | Supported | Supported |
| SQLite | All versions | Not supported | Not supported |
| Sybase | All versions | Supported | Supported |
| Teradata | All versions | Not supported | Supported |