Before you begin You have been assigned a Manager security role. You have already created the query mapping. Procedure Click the name of the query mapping to open the Mapping Editor tab. Click Add source to select source table(s). You can use filters to narrow down the choices from the list. Specify as many source tables as needed. In the Columns tab, click the Detect Links magic wand to automatically match tables and columns. You can also drag a specific source column to target column to map all the columns manually. In the Joins tab, click the Detect Joins magic wand to automatically define joins for the source tables. Save your changes.