说明：  ARCGIS 9 - Database Servers Tutorial ArcSDE database servers are used to store, access, and administer ArcSDE Personal and Workgroup geodatabases. ArcSDE Personal is available free with ArcGIS Desktop at the ArcEditor or ArcInfo license levels. ArcSDE Workgroup is licensed with ArcGIS Server at the Workgroup level. Both provide you with ArcSDE geodatabase functionality, such as versioned editing, archiving, and replication. They differ from ArcSDE Enterprise geodatabases in maximum size, number of connections, administration, and customization.