信息如下：

SQL> select * from V$version;

BANNER

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

Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production

PL/SQL Release 9.2.0.1.0 - Production

CORE    9.2.0.1.0       Production

TNS for 32-bit Windows: Version 9.2.0.1.0 - Production

NLSRTL Version 9.2.0.1.0 - Production

SQL> select count(*) from logbook;

COUNT(*)

----------

12057711

SQL> desc logbook;

名称                                      是否为空? 类型

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

LB_ID                                     NOT NULL NUMBER(20)

US_ID                                     NOT NULL NUMBER(20)

TL_ID                                              NUMBER(20)

UT_ID                                              NUMBER(20)

ACCESSIP                                           VARCHAR2(20)

EVENT                                     NOT NULL NUMBER(3)

EVENT_TIME1                               NOT NULL DATE

EVENT_TIME2                               NOT NULL DATE

SQL> create table logbookpt

partition by range (EVENT_TIME1)

(

partition lb0 values less than (TO_DATE('2005-01-01','yyyy-mm-dd'))

tablespace users,

partition lb1 values less than (TO_DATE('2005-02-01','yyyy-mm-dd'))

tablespace users,

partition lb2 values less than (TO_DATE('2005-03-01','yyyy-mm-dd'))

tablespace users,

partition lb3 values less than (TO_DATE('2005-04-01','yyyy-mm-dd'))

tablespace users,

partition lb4 values less than (TO_DATE('2005-05-01','yyyy-mm-dd'))

tablespace users,

partition lb5 values less than (TO_DATE('2005-06-01','yyyy-mm-dd'))

tablespace users,

partition lb6 values less than (TO_DATE('2005-07-01','yyyy-mm-dd'))

tablespace users,

partition lb7 values less than (TO_DATE('2005-08-01','yyyy-mm-dd'))

tablespace users,

partition lb8 values less than (TO_DATE('2005-09-01','yyyy-mm-dd'))

tablespace users,

partition lb9 values less than (to_date('2006-01-01','yyyy-mm-dd'))

tablespace users

)

as

select * from logbook;

SQL> create  index logbookpt_event1_idx on logbookpt(event_time1) local

tablespace indx;

SQL> create index logpt_usid_idx on logbookpt(us_id)

tablespace indx;

SQL> create index logpt_event_idx on logbookpt(event)

tablespace indx;

SQL> select  count(*) sum1, count(distinct tg.user_id) sum2, sum(lb.event_time2-

lb.event_time1)*24 sum3, tg.group_id

2              from logbookpt  partition(lb8)  lb, tuser tu ,tuser_group tg

3               where lb.event = 3 and lb.us_id = tu.id and tu.id = tg.user_id

4                   and  tu.groupids like ',,9001,,9002,,19350,,19625,,%'

5                   and event_time1 >= (to_date('2005-08-01','YYYY-MM-DD'))

6                   and event_time1 <= (to_date('2005-08-02','YYYY-MM-DD')+1)

7              group by tg.group_id;

已选择6行。

已用时间:  00: 00: 02.03

Execution Plan

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

0      SELECT STATEMENT Optimizer=CHOOSE (Cost=190 Card=35 Bytes=33

95)

1    0   SORT (GROUP BY) (Cost=190 Card=35 Bytes=3395)

2    1     TABLE ACCESS (BY INDEX ROWID) OF 'TUSER_GROUP' (Cost=2 C

ard=280689 Bytes=2245512)

3    2       NESTED LOOPS (Cost=184 Card=35 Bytes=3395)

4    3         NESTED LOOPS (Cost=114 Card=35 Bytes=3115)

5    4           TABLE ACCESS (BY LOCAL INDEX ROWID) OF 'LOGBOOKPT'

(Cost=79 Card=35 Bytes=1540)

6    5             INDEX (RANGE SCAN) OF 'LOGBOOKPT_EVENT1_IDX' (NO

N-UNIQUE) (Cost=2 Card=6260)

7    4           TABLE ACCESS (BY INDEX ROWID) OF 'TUSER' (Cost=1 C

ard=1 Bytes=45)

8    7             INDEX (UNIQUE SCAN) OF 'PK_TUSER' (UNIQUE)

9    3         INDEX (RANGE SCAN) OF 'TUSER_GROUP_USER_ID_IDX' (NON

-UNIQUE) (Cost=1 Card=1)

Statistics

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

56  recursive calls

0  db block gets

262475  consistent gets

0  physical reads

0  redo size

770  bytes sent via SQL*Net to client

503  bytes received via SQL*Net from client

2  SQL*Net roundtrips to/from client

5  sorts (memory)

0  sorts (disk)

6  rows processed

SQL> select   count(*) sum1, count(distinct tg.user_id) sum2, sum(lb.event_time2

-lb.event_time1)*24 sum3, tg.group_id

2              from logbook lb, tuser tu ,tuser_group tg

3              where lb.event = 3 and lb.us_id = tu.id and tu.id = tg.user_id

4                   and  tu.groupids like ',,9001,,9002,,19350,,19625,,%'

5                   and event_time1 >= (to_date('2005-08-01','YYYY-MM-DD'))

6                   and event_time1 <= (to_date('2005-08-02','YYYY-MM-DD')+1)

7              group by tg.group_id;

已选择6行。

已用时间:  00: 00: 02.07

Execution Plan

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

0      SELECT STATEMENT Optimizer=CHOOSE (Cost=14 Card=1 Bytes=74)

1    0   SORT (GROUP BY) (Cost=14 Card=1 Bytes=74)

2    1     TABLE ACCESS (BY INDEX ROWID) OF 'TUSER_GROUP' (Cost=2 C

ard=280689 Bytes=2245512)

3    2       NESTED LOOPS (Cost=8 Card=1 Bytes=74)

4    3         NESTED LOOPS (Cost=6 Card=1 Bytes=66)

5    4           TABLE ACCESS (BY INDEX ROWID) OF 'LOGBOOK' (Cost=5

Card=1 Bytes=21)

6    5             INDEX (RANGE SCAN) OF 'LOGBOOK_EVENT_TIME1_2_IDX

' (NON-UNIQUE) (Cost=3 Card=2)

7    4           TABLE ACCESS (BY INDEX ROWID) OF 'TUSER' (Cost=1 C

ard=1 Bytes=45)

8    7             INDEX (UNIQUE SCAN) OF 'PK_TUSER' (UNIQUE)

9    3         INDEX (RANGE SCAN) OF 'TUSER_GROUP_USER_ID_IDX' (NON

-UNIQUE) (Cost=1 Card=1)

Statistics

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

0  recursive calls

0  db block gets

265100  consistent gets

0  physical reads

0  redo size

770  bytes sent via SQL*Net to client

503  bytes received via SQL*Net from client

2  SQL*Net roundtrips to/from client

1  sorts (memory)

0  sorts (disk)

6  rows processed

大家可以看到性能上基本上没有什么差别？？？

请各位指点迷津，多谢！