Question

SQL查询语句怎样限定返回结果集的行数

Answer 1

1、创建测试表，create table test_rows(id number, value varchar(200));

2、插入测试数据，

insert into test_rows

select level, 'val_'||level from dual 

connect by level<1000;

commit;

3、查询表中记录数，总共有999条，

4、编写sql，返回最小的10条记录，

select * from (select t.*, row_number() over(order by id) rn from test_rows t ) where rn=10;