区间查询与等效minus查询

--表结构
create table hy_emp(
    id number(4,0) primary key,
    name nvarchar2(20) not null,
    edate date)
 
--充值
insert into hy_emp
select rownum,dbms_random.string('*',dbms_random.value(1,20)),sysdate
from dual
connect by level<101
order by dbms_random.random
 
--查所有数据
select * from hy_emp order by id
 
--排序后加上伪列
select rownum as rn,a.* from (select * from hy_emp order by id) a 
 
--区间查询
select b.* from (select rownum as rn,a.* from (select * from hy_emp order by id) a ) b where b.rn>=10 and b.rn<=15
 
--与区间查询等效的minus查询
select b.* from (select rownum as rn,a.* from (select * from hy_emp order by id) a ) b where b.rn<=15
minus
select b.* from (select rownum as rn,a.* from (select * from hy_emp order by id) a ) b where b.rn<10

--2020-04-02--