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11-22 Oracle Fusion Middleware Developers Guide for Oracle Data Integrator In an ETL-style interface, ODI processes the data in a staging area, which is different from the target. The data is first extracted from the sources and then loaded to the staging area. The data transformations take place in the staging area and the intermediate results are stored in temporary tables in the staging area. The data loading and transformation tasks are performed with the standard ELT KMs. Oracle Data Integrator provides two ways for loading the data from the staging area to the target: ■ Using a Multi-connection IKM ■ Using an LKM and a mono-connection IKM Depending on the KM strategy that is used, flow and static control are supported. See Designing an ETL-Style Interface in the Oracle Fusion Middleware Connectivity and Knowledge Modules Guide for Oracle Data Integrator for more information. Using a Multi-connection IKM A multi-connection IKM allows updating a target where the staging area and sources are on different data servers. Figure 11–2 shows the configuration of an integration interface using a multi-connection IKM to update the target data. Figure 11–2 ETL-Interface with Multi-connection IKM See the chapter in the Oracle Fusion Middleware Connectivity and Knowledge Modules Guide for Oracle Data Integrator that corresponds to the technology of your staging area for more information on when to use a multi-connection IKM. To use a multi-connection IKM in an ETL-style interface:

1. Create an integration interface using the standard procedure as described in

Section 11.3, Creating an Interface . This section describes only the ETL-style specific steps.

2. In the Definition tab of the Interface Editor, select Staging Area different from

Target and select the logical schema of the source tables or another logical schema that is not a source or the target. This schema will be used as the staging area.

3. In the Flow tab, select one of the Source Sets, by clicking its title. The Property

Inspector opens for this object.

4. Select an LKM from the LKM Selector list to load from the sources to the staging

area. See the chapter in the Oracle Fusion Middleware Connectivity and Knowledge Modules Guide for Oracle Data Integrator that corresponds to the technology of your staging area to determine the LKM you can use.

5. Optionally, modify the KM options.