One or more selected tables are already on the diagram.
You can only have one copy of any table on a diagram.
If you want to create a new table that has some of the same columns as an existing table, you can duplicate an existing table as the first step in creating a new table.
| Adding Tables to a Database Diagram | How to insert a new table into a database diagram (Enterprise Manager) |
| How to copy a table from another database diagram (Enterprise Manager) |