本文例項講述了MySQL橫縱表相互轉化操作實現方法。分享給大家供大家參考，具體如下：

先建立一個成績表（縱表）

create table user_score
(
  name varchar(20),subjects varchar(20),score int
);
insert into user_score(name,subjects,score) values('張三','語文',60);
insert into user_score(name,'數學',70);
insert into user_score(name,'英語',80);
insert into user_score(name,score) values('李四',90);
insert into user_score(name,100);

再建立一個成績表（橫表）

create table user_score2
(
  name varchar(20),yuwen int,shuxue int,yingyu int
);
insert into user_score2(name,yuwen,shuxue,yingyu) values('張三',60,70,80);
insert into user_score2(name,yingyu) values('李四',90,100,0);

縱錶轉橫表

select name,sum(case subjects when '語文' then score else 0 end) 
as '語文',sum(case subjects when '數學' then score else 0 end) 
as '數學',sum(case subjects when '英語' then score else 0 end) 
as '英語'from user_score group by name;

縱錶轉橫表

SELECT  name,'yuwen'  AS   subjects,yuwen  AS  score  FROM  user_score2  UNION  ALL  
SELECT  name,'shuxue'  AS   subjects,shuxue  AS  score  FROM  user_score2 UNION  ALL  
SELECT  name,'yingyu'  AS   subjects,yingyu  AS  score  FROM  user_score2 
ORDER BY name,subjects DESC; 

更多關於MySQL相關內容感興趣的讀者可檢視本站專題：《MySQL查詢技巧大全》、《MySQL事務操作技巧彙總》、《MySQL儲存過程技巧大全》、《MySQL資料庫鎖相關技巧彙總》及《MySQL常用函式大彙總》

希望本文所述對大家MySQL資料庫計有所幫助。