ORACLE间隔分区

CREATE TABLE interval_sales
( prod_id NUMBER(6)
, cust_id NUMBER
, time_id DATE
, channel_id CHAR(1)
, promo_id NUMBER(6)
, quantity_sold NUMBER(3)
, amount_sold NUMBER(10,2)
)
PARTITION BY RANGE (time_id)
INTERVAL(NUMTOYMINTERVAL(1, 'MONTH'))
( PARTITION p0 VALUES LESS THAN (TO_DATE('1-1-2008', 'DD-MM-YYYY')),
PARTITION p1 VALUES LESS THAN (TO_DATE('1-1-2009', 'DD-MM-YYYY')),
PARTITION p2 VALUES LESS THAN (TO_DATE('1-7-2009', 'DD-MM-YYYY')),
PARTITION p3 VALUES LESS THAN (TO_DATE('1-1-2010', 'DD-MM-YYYY')) );
上面的例子表示除了上面已经定义的分区以外，每个月只要有数据，就会新建一个分区。

INTERVAL(NUMTOYMINTERVAL(1, 'MONTH')) 按月
INTERVAL (NUMTODSINTERVAL(1,’day’)) 按天
INTERVAL(NUMTOYMINTERVAL(1, 'YEAR'))  按年