例子1

create table testScore    
(       
   tname varchar(30) null,    
   ttype varchar(10) null,    
   tscor int null   
);    

insert into testScore values ('張三','語文',80);   
insert into testScore values ('張三','數學',98);    
insert into testScore values ('張三','英語',65);    
insert into testScore values
 
 ('李四','語文',70);    
insert into testScore values ('李四','數學',80);    
insert into testScore values ('李四','英語',90);    


select
    tname as '姓名' ,     
    max(case ttype when '語文' then tscor else 0 end) '語文',     
    max(case ttype when '數學' then tscor else 0 end) '數學',     
    max(case ttype when '英語'
 
 then tscor else 0 end) '英語'     
from testScore     
group by tname

結果為：

例子2

select 
      tname as '姓名',
      case
          when ttype='數學' then '理科'
          else '文科'
      end as '科別',
      sum(tscor) as '總分'
from testscore
group
 
 by 
      tname,
      case
          when ttype='數學' then '理科'
          else '文科'
      end

結果為：