复制代码 代码如下: //创建成绩表 create table result( stu_id varchar2(20) not null, china number(9,2) null, math number(9,2) null, english number(9,2) null ); //插入数据 insert into result values('0001',60,20,80); insert int
复制代码 代码如下://创建成绩表 create table result( stu_id varchar2(20) not null, china number(9,2) null, math number(9,2) null, english number(9,2) null); //插入数据 insert into result values('0001',60,20,80); insert into result values('0002',80,60,80); insert into result values('0003',20,85,80); select *from result; //条件查询 select stu_id,(case when china>80 then '优秀' when china>=60 then '及格' when china<60 then '不及格' end) as 语文 , (case when math>80 then '优秀' when math>=60 then '及格' when math<60 then '不及格' end )as 数学 , (case when english>80 then '优秀' when english>=60 then '及格' when english<60 then '不及格' end) as 英语 from result
