标签：name ref block mic char default eof 实现 desc
1、准备
1 create table newtable 2 ( 3 name VARCHAR(100), 4 yuwen INT(10), 5 shuxue INT(10) 6 ) ENGINE=InnoDB DEFAULT CHARSET=utf8; 7 8 9 INSERT INTO newtable (name, yuwen, shuxue) VALUES (‘张三‘, 80, 67); 10 INSERT INTO newtable (name, yuwen, shuxue) VALUES (‘李四‘, 98, 65); 11 INSERT INTO newtable (name, yuwen, shuxue) VALUES (‘王五‘, 59, 98); 12 INSERT INTO newtable (name, yuwen, shuxue) VALUES (‘赵六‘, 76, 87); 13 INSERT INTO newtable (name, yuwen, shuxue) VALUES (‘田七‘, 69, 85);
2、实现
1 select yuwentable.name studentname,yuwentable.yuwen yuwenscore ,cast(yuwentable.rank as SIGNED) yuwenrank,shuxuetable.shuxue shuxuescore,cast(shuxuetable.rank as SIGNED) shuxuescore 2 from 3 ( 4 select (@yuwenrank:=@yuwenrank+1) as rank,name,yuwen 5 from newtable a,(select (@yuwenrank:=0)) b order by a.yuwen desc 6 ) yuwentable , 7 ( 8 select (@shuxuerank:=@shuxuerank+1) as rank,name,shuxue 9 from newtable a,(select (@shuxuerank:=0)) b order by a.shuxue desc 10 ) shuxuetable 11 where yuwentable.name = shuxuetable.name order by yuwentable.name
说明：在DbVisualizer中,代码执行后，RANK这列含有小数点，所以这里通过case函数将其转换整数
3、结果
studentname yuwenscore yuwenrank shuxuescore shuxuescore ----------- ---------- --------- ----------- ----------- 张三 80 2 67 4 李四 98 1 65 5 王五 59 5 98 1 田七 69 4 85 3 赵六 76 3 87 2
如果，您认为阅读这篇博客让您有些收获，不妨点击一下右下角的【推荐】。
如果，您希望更容易地发现我的新博客，不妨点击一下左下角的【关注我】。
如果，您对我的博客所讲述的内容有兴趣，请继续关注我的后续博客，我是【刘超★ljc】。
本文版权归作者，禁止转载，否则保留追究法律责任的权利。
标签：name ref block mic char default eof 实现 desc
原文地址：http://www.cnblogs.com/codeOfLife/p/7403765.html
