oracle 查询分页sql语句

//oracle 查询分页 sql语句1： select * from (select A.*, rownum rn from (select * from student) A) where rn between1 and 2; sql语句2（据说这种方法查询效率高，未验证）： select * from (select A.*,rownum rn from (select * from student where s

//oracle 查询分页
sql语句1：

select * from (select A.*, rownum rn from (select * from student) A) where rn

between 1 and 2;

sql语句2（据说这种方法查询效率高，未验证）：

select * from (select A.*,rownum rn from (select * from student where s_id between 5 and 9) A

where rownum=1

SQL> select * from student;

S_ID S_NAME S_AGE
-------------------------------------------------------------------------------- -------------------------------------------------- -----
1 potter 26
2 add 21
3 had 12
4 renee 15
5 reday 18
6 alisa 19
7 胡总 23
8 阿里山 29
9 扎西 20
10 香格里拉 24
11 琪琪格 28
12 暗夜精灵 19

12 rows selected

SQL> select * from (select A.*, rownum rn from (select * from student) A) where rn between 2 and 4;

S_ID S_NAME S_AGE RN
-------------------------------------------------------------------------------- -------------------------------------------------- ----- ----------
2 add 21 2
3 had 12 3
4 renee 15 4

SQL> select * from (select A.*, rownum rn from (select * from student) A) where rn between 1 and 5;

S_ID S_NAME S_AGE RN
-------------------------------------------------------------------------------- -------------------------------------------------- ----- ----------
1 potter 26 1
2 add 21 2
3 had 12 3
4 renee 15 4
5 reday 18 5

SQL> select * from (select A.*, rownum rn from (select * from student) A) where rn between 1 and 10;

S_ID S_NAME S_AGE RN
-------------------------------------------------------------------------------- -------------------------------------------------- ----- ----------
1 potter 26 1
2 add 21 2
3 had 12 3
4 renee 15 4
5 reday 18 5
6 alisa 19 6
7 胡总 23 7
8 阿里山 29 8
9 扎西 20 9
10 香格里拉 24 10

10 rows selected

SQL> select * from (select A.*, rownum rn from (select * from student) A) where rn between 8 and 10;

S_ID S_NAME S_AGE RN
-------------------------------------------------------------------------------- -------------------------------------------------- ----- ----------
8 阿里山 29 8
9 扎西 20 9
10 香格里拉