http://docs.oracle.com/cd/B28359_01/appdev.111/b28425/ext_types_ref.htm
例子：
SQL> column text format a20
SQL> select column_value text from table (sys.ODCIVarchar2List(1,2,3,'AAA','BBB','CCC'));
TEXT
--------------------
1
2
3
AAA
BBB
CCC
6 rows selected.
SQL> select column_value num from table (sys.ODCINumberList(1,2,3,'99'));
NUM
----------
1
2
3
99
$ echo $NLS_DATE_FORMAT
YYYY-MM-DD HH24:MI:SS
SQL>
SQL> select column_value idate from table (sys.ODCIdateList('2012-1-1','2012-1-6 23:40:10'));
IDATE
-------------------
2012-01-01 00:00:00
2012-01-06 23:40:10