Right-click and select Add Sequence from the context menu.
Enter a multi-tenant sequence name and properties in the Add Sequence
wizard.
Select the Multi-tenant check box.
Note: The Multi-tenant check box is unchecked and
disabled when you add a sequence for database that is not enabled for
multitenancy; it is unchecked and enabled when you add a shared sequence. A
shared sequence cannot be converted to a multi-tenant sequence unless it is
dropped and recreated.
Click Add.
Click Finish.
Note: The multi-tenant sequence is automatically added to the DB
Structure view.