Query Builder is a custom web control which allows the user to build a query and verify/execute it. The web control lists all of the layers that are available on the primary map resource. When a user selects a layer, the query automatically populates the list of columns (fields) for the layer. The user can then either manually type out the query, or double click on any of the columns and enter a value for it. The query has a standard SQL query syntax (i.e. ID=1234 AND Status= Ready ). The user has the option of validating the query, or executing it. Validating will test for any errors in the query. Executing will run the query and highlight the results.