[PHP]

create table c_t1 as select * from c_zysfcg where rownum<1;

insert into c_t1 select * from c_zysfcg where sfsj>=to_date('20060101','yyyymmdd') and sfsj<=to_date('20060331','yyyymmdd');

已创建1301555行。

已用时间:  00: 00: 47.85

Execution Plan

----------------------------------------------------------

0      INSERT STATEMENT Optimizer=CHOOSE (Cost=880 Card=1186914 Bytes=90205464)

1    0   PARTITION RANGE (ITERATOR)

2    1     TABLE ACCESS (FULL) OF 'C_ZYSFCG' (Cost=880 Card=1186914 Bytes=90205464)

Statistics

----------------------------------------------------------

5861  recursive calls

97458  db block gets

36944  consistent gets

16240  physical reads

137946336  redo size

850  bytes sent via SQL*Net to client

649  bytes received via SQL*Net from client

3  SQL*Net roundtrips to/from client

4  sorts (memory)

0  sorts (disk)

1301555  rows processed

rollback;

truncate table c_t1;

insert into c_t1 /*+ append */ select /*+ parallel(c_zysfcg,2) */ * from c_zysfcg where sfsj>=to_date('20060101','yyyymmdd') and sfsj<=to_date('20060331','yyyymmdd');

已创建1301555行。

已用时间:  00: 01: 60.71

Execution Plan

----------------------------------------------------------

0      INSERT STATEMENT Optimizer=CHOOSE (Cost=880 Card=1186914 Bytes=90205464)

1    0   PARTITION RANGE* (ITERATOR)                                :Q12000

2    1     TABLE ACCESS* (FULL) OF 'C_ZYSFCG' (Cost=880 Card=118691 :Q120004 Bytes=90205464)

1 PARALLEL_COMBINED_WITH_PARENT

2 PARALLEL_TO_SERIAL            SELECT /*+ Q12000 NO_EXPAND ROWID(A1) */ A1."IDB",A1."XM",A1."BQDM",A1."ZKDM",A1

Statistics

----------------------------------------------------------

5499  recursive calls

97499  db block gets

36883  consistent gets

16239  physical reads

137944544  redo size

857  bytes sent via SQL*Net to client

691  bytes received via SQL*Net from client

3  SQL*Net roundtrips to/from client

7  sorts (memory)

0  sorts (disk)

1301555  rows processed

2CPU

....

[/PHP]

结果很奇怪，按说使用了append应该会快些，不过c_t1是新建的空表，而且默认是logging模式，如果使用nologging也许会快些吧