You can define a property alteration that modifies queried drawing objects based on data stored in a linked database.
To alter retrieved drawing objects based on linked SQL data
For example, to modify the color of retrieved objects, select Color as the property to change.
The SQL column and link template are displayed under Expression in the Set Property Alterations dialog box, preceded by an ampersand (&). The link template is preceded by an at (@) symbol, for example, &Diameter@PIPES.
You can also enter the SQL data variable directly in the Expression box.
The property alteration definition is added to the Current Property Alterations list.
When you execute the query with Alter Properties selected, AutoCAD Map 3D toolset changes the queried objects based on the value stored in the external database.