When you create logical tables and columns by dragging and dropping from the Physical layer, the logical table sources are generated automatically.
When you create logical tables and columns by dragging and dropping from the Physical layer, the logical table sources are generated automatically. If you create the logical tables manually, you need to also create the sources manually.
You also add new logical table sources when multiple physical tables can be the source of information. For example, many tables could hold information for revenue. You might have three different business units, each with its own order system, where you get revenue information. In another example, you might periodically summarize revenue from an orders system or a financial system and use this table for high-level reporting.
Use the General tab of the Logical Table Source dialog to define general properties for the logical table source.