# Using Oracle as a source

This section describes how to set up connectivity to the Oracle database defined for the Replicate task. This is required if you want to discover the tables and/or views from the source database as opposed to the landing zone. For a list of the pros and cons of each method, see [Discovering the Source Database or Landing Zone](https://help.qlik.com/en-US/compose/December2024/Content/ComposeDWDL/Main/DW/Model/discover_source_database_or_landing_area.htm).

It contains the following topics:

* [Prerequisites](https://help.qlik.com/en-US/compose/December2024/Content/ComposeDWDL/Main/DW/Data%20Source%20Connections/prerequisites_oracle_source.htm)
* [Oracle data types](https://help.qlik.com/en-US/compose/December2024/Content/ComposeDWDL/Main/DW/Data%20Source%20Connections/data_types_oracle_source.htm)
* [Defining the connection parameters](https://help.qlik.com/en-US/compose/December2024/Content/ComposeDWDL/Main/DW/Data%20Source%20Connections/define_connection_parameters_oracle_source.htm)