Oracle new new partition table on the basis of existing

       The new principle established partition is equivalent to the establishment of a temporary table, and then copy the original data table, then delete the original table, the final table will be temporarily renamed the original show, partition has been constructed.

• Procedure code

--创建临时表
CREATE TABLE temp_Stock_Received
(
  Stock_ID NUMBER PRIMARY KEY,
  Stock_Date DATE,
  Cost NUMBER(20,2) NOT NULL
)
PARTITION BY RANGE(Stock_Date)
(
  PARTITION P1 VALUES LESS THAN(TO_DATE('2019-04-1','YYYY-MM-DD')),
  PARTITION P2 VALUES LESS THAN(TO_DATE('2019-07-1','YYYY-MM-DD')),
  PARTITION P3 VALUES LESS THAN(TO_DATE('2019-10-1','YYYY-MM-DD')),
  PARTITION P4 VALUES LESS THAN(MAXVALUE)
);

--复制原始表数据
INSERT INTO temp_Stock_Received
SELECT * FROM Stock_Received;    

--删除原始表
DROP TABLE Stock_Received;   

--修改临时表名称
RENAME temp_Stock_Received TO Stock_Received;