SQL Expression dialog box
 
 
 

Select a column in an external database.

To see columns from a different database table, select the link template for the table from the Link Templates list.

In most cases, the Link Templates list includes only link templates for active source drawings. If the link template you want is not listed, be sure it is defined in the source drawing, and the appropriate data source is attached and connected.

If you are using a command that involves topology, the Link Templates list includes only link templates for the drawing where the topology is loaded. If you loaded the topology from source drawings, the list displays link templates defined in the source drawing; if you loaded the topology from the current drawing, the list displays link templates in the current drawing.