Oracle的四道经典面试题分享

前言

本文整理了4道oracle 经典面试题，与大家分享学习。这也许是你一直期待的文章，下面话不多说了，来一起看看详细的介绍吧

第一题

create table test(
 id number(10) primary key,
 type number(10) ,
 t_id number(10),
 value varchar2(6)
);

insert into test values(100,1,1,'张三');
insert into test values(200,2,1,'男');
insert into test values(300,3,1,'50');

insert into test values(101,1,2,'刘二');
insert into test values(201,2,2,'男');
insert into test values(301,3,2,'30');

insert into test values(102,1,3,'刘三');
insert into test values(202,2,3,'女');
insert into test values(302,3,3,'10');

select * from test;