SQL>
SQL> create or replace type employeeType is object (
2 empNo NUMBER,
3 eName VARCHAR2(10)
4 )
5 /
Type created.
SQL>
SQL> desc employeeType;
Name Null? Type
--------------------------------
EMPNO NUMBER
ENAME VARCHAR2(10)
SQL>
SQL> alter type employeeType
2 add attribute birthdate_dt DATE; -- add attribute
3 /
Type altered.
SQL>
SQL> drop type employeeType
2 /
Type dropped.
SQL>