# Configure the Connector

This section describes how to use the `SubTables` parameter to retrieve data from a sub-table.

To retrieve data from a sub-table

1. Stop the connector.
2. Open the connector’s configuration file and find the `[FetchTasks]` section.

3. Use the `SubTables` parameter to specify the name of a new section in the configuration file. The new section will contain parameters that instruct the connector to extract data from the sub-table. For example:

       [ExampleDatabase]
       ConnectionString=...
       SQL=select * from orders
       PrimaryKeys=OrderID
       Template=template.tmpl
       SubTables=Customers

4. Create the new section, and set the following parameters.

   `Template` | The path to a template file. The template file defines how the data extracted from the table is indexed into IDOL Server.
   `SQL` | A SQL statement to retrieve the information from the sub-table.

   For example:

       [Customers]
       Template=customers.tmpl
       SQL=select * from Customers where CustomerID=@CustomerID

   NOTE: The connector runs this query for every row returned by the main SQL statement (`select * from orders`). The connector automatically replaces `@CustomerID` with the `CustomerID` retrieved from the main table (`orders`).

5. Save and close the configuration file.

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