구문

>>-CREATE--+----------+---TABLE--table-name--------------------->
           '-SUMMARY--'
 
>-----+-| element-list |------------------------------+--------->
      +-OF--type-name1--+--------------------------+--+
      |                 '-| typed-table-options |--'  |
      +-| summary-table-definition |------------------+
      '-LIKE--+-table-name1-+---+-------------------+-'
              +-view-name---+   '-| copy-options |--'
              '-nickname----'
 
        .-DATA CAPTURE NONE----.
>----*--+----------------------+--*----------------------------->
        '-DATA CAPTURE CHANGES-'
 
>-----+-----------------------------------------------+--*------>
      '-IN--tablespace-name1--| tablespace-options |--'
 
>-----+------------------------------------------------------------+>
      |                      .-,---------.                         |
      |                      V           |      .-USING HASHING--. |
      +-PARTITIONING KEY--(-----column---+---)--+----------------+-+
      '-REPLICATED-------------------------------------------------'
 
>----*--+----------------------+---*---------------------------><
        '-NOT LOGGED INITIALLY-'
 
element-list
 
       .-,---------------------------------.
       V                                   |
|---(------+-| column-definition |------+--+---)----------------|
           +-| unique-constraint |------+
           +-| referential-constraint |-+
           '-| check-constraint |-------'
 
typed-table-options
 
|---+----------------------------+---+-------------------------+->
    +-HIERARCHY--hierarchy-name--+   '-| typed-element-list |--'
    '-| under-clause |-----------'
 
>---------------------------------------------------------------|
 
under-clause
 
|---UNDER--supertable-name--INHERIT SELECT PRIVILEGES-----------|
 
typed-element-list
 
       .-,--------------------------------.
       V                                  |
|---(------+-| OID-column-definition |-+--+---)-----------------|
           +-| with-options |----------+
           +-| unique-constraint |-----+
           '-| check-constraint |------'
 

 
summary-table-definition
 
|--+----------------------------+---AS--(--fullselect--)--| summary-table-options |-->
   |    .-,--------------.      |
   |    V                |      |
   '-(-----column-name---+---)--'
 
>---------------------------------------------------------------|
 
너무산만해서 이해가안되요  

|--+----------------------------+---
   |    .-,--------------.      |
   |    V                |      |
   '-(-----column-name---+---)--'

보기가 너무어려운거 같아요 쉽게 설명좀해주실수있는지 고수님들부탁해요