The Type Wizard is the quickest and easiest way to create an Oracle user-defined datatype. It leads you through the steps necessary to create a new object type or a collection type, which may be a table type or a varying array type (VARRAY). You cannot use the Type Wizard to edit an existing type.
Specifically, use the Type Wizard to complete the following tasks:
About Oracle user-defined datatypes
Creating an Oracle user-defined datatype with the Type Wizard
Oracle Object Support in the Object Navigator