Note
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Access to this page requires authorization. You can try changing directories.
Applies to: 
SQL Server
Azure SQL Database
Azure SQL Managed Instance
Analytics Platform System (PDW)
When you no longer need a database diagram, you can delete it.
Delete a database diagram
In Object Explorer, expand the Database Diagrams folder.
Right-click the database diagram that you want to delete.
Choose Delete on the shortcut menu.
A message prompts you to confirm the deletion. Choose Yes.
The database diagram is deleted from the database. When you delete a database diagram, the tables in the diagram aren't deleted.