这是一个游戏玩家表,contry表示玩家国家代号,money表示玩家剩余金钱
现在要使用一条sql语句查询每个国家中金钱最多的3个用户(每组3个玩家)
select * from player order by contry, money desc
-- 查询每个国家中金钱最多的3个用户信息
9 个解决方案
#1
select * from (
select *,rank()over(partition by contry order by money desc) as rk from player order by contry, money desc
) tp where rk<=3
order by contry,money desc
#2
select * from player t
where (select count(1) from player where contry=t.contry and [money]>=t.[money])<=3
#3
select * from player t
where (select count(*) from player where t.contry=contry and t.money<money )<=3
#4
--2005 later
Create table #
(
contry varchar(10)
,[money] int
)
Insert # Select 'usa',10000
union Select 'usa',100001
union Select 'usa',1000011
union Select 'usa',10000111
union Select 'usa',100001111
union Select 'CN',100001
union Select 'CN',10000111
union Select 'CN',100001111
union Select 'CN',1000011111
union Select 'UK',100001
union Select 'UK',1000011
union Select 'UK',100001111
union Select 'UK',10000111
Select * From #
Select Top 9 Contry,money From
(Select Row_Number() Over(partition by contry order by money) ID,* From # )t
Order by Id,[Money]
#5
谢了。不过
“rank()over(partition by contry order by money desc)”这句恕我才疏学浅,没有见过
#6
谢了,十分强悍
#7
谢了,十分强悍
#8
---------------------------------
-- Author: liangCK 小梁
-- Title : 查每个分组前N条记录
-- Date : 2008-11-13 17:19:23
---------------------------------
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (ID VARCHAR(3),GID INT,Author VARCHAR(29),Title VARCHAR(39),Date DATETIME)
INSERT INTO #T
SELECT '001',1,'邹建','深入浅出SQLServer2005开发管理与应用实例','2008-05-10' UNION ALL
SELECT '002',1,'胡百敬','SQLServer2005性能调校','2008-03-22' UNION ALL
SELECT '003',1,'格罗夫Groff.J.R.','SQL完全手册','2009-07-01' UNION ALL
SELECT '004',1,'KalenDelaney','SQLServer2005技术内幕存储引擎','2008-08-01' UNION ALL
SELECT '005',2,'Alex.Kriegel.Boris.M.Trukhnov','SQL宝典','2007-10-05' UNION ALL
SELECT '006',2,'飞思科技产品研发中心','SQLServer2000高级管理与开发','2007-09-10' UNION ALL
SELECT '007',2,'胡百敬','SQLServer2005数据库开发详解','2008-06-15' UNION ALL
SELECT '008',3,'陈浩奎','SQLServer2000存储过程与XML编程','2005-09-01' UNION ALL
SELECT '009',3,'赵松涛','SQLServer2005系统管理实录','2008-10-01' UNION ALL
SELECT '010',3,'黄占涛','SQL技术手册','2006-01-01'
--SQL查询如下:
--按GID分组,查每个分组中Date最新的前2条记录
--1.字段ID唯一时:
SELECT * FROM #T AS T WHERE ID IN(SELECT TOP 2 ID FROM #T WHERE GID=T.GID ORDER BY Date DESC)
--2.如果ID不唯一时:
SELECT * FROM #T AS T WHERE 2>(SELECT COUNT(*) FROM #T WHERE GID=T.GID AND Date>T.Date)
--SQL Server 2005 使用新方法
--3.使用ROW_NUMBER()进行排位分组
SELECT ID,GID,Author,Title,Date
FROM
(
SELECT rid=ROW_NUMBER() OVER(PARTITION BY GID ORDER BY Date DESC),*
FROM #T
) AS T
WHERE rid<=2
--4.使用APPLY
SELECT DISTINCT b.*
FROM #T AS a
CROSS APPLY
(
SELECT TOP(2) * FROM #T WHERE a.GID=GID ORDER BY Date DESC
) AS b
--结果
/*
ID GID Author Title Date
---- ----------- ----------------------------- --------------------------------------- -----------------------
003 1 格罗夫Groff.J.R. SQL完全手册 2009-07-01 00:00:00.000
004 1 KalenDelaney SQLServer2005技术内幕存储引擎 2008-08-01 00:00:00.000
005 2 Alex.Kriegel.Boris.M.Trukhnov SQL宝典 2007-10-05 00:00:00.000
007 2 胡百敬 SQLServer2005数据库开发详解 2008-06-15 00:00:00.000
009 3 赵松涛 SQLServer2005系统管理实录 2008-10-01 00:00:00.000
010 3 黄占涛 SQL技术手册 2006-01-01 00:00:00.000
(6 行受影响)
*/
#9
select
distinct b.*
from
tb a
cross apply
(select top 3 * from tb where contry=a.contry order by money)b
#1
select * from (
select *,rank()over(partition by contry order by money desc) as rk from player order by contry, money desc
) tp where rk<=3
order by contry,money desc
#2
select * from player t
where (select count(1) from player where contry=t.contry and [money]>=t.[money])<=3
#3
select * from player t
where (select count(*) from player where t.contry=contry and t.money<money )<=3
#4
--2005 later
Create table #
(
contry varchar(10)
,[money] int
)
Insert # Select 'usa',10000
union Select 'usa',100001
union Select 'usa',1000011
union Select 'usa',10000111
union Select 'usa',100001111
union Select 'CN',100001
union Select 'CN',10000111
union Select 'CN',100001111
union Select 'CN',1000011111
union Select 'UK',100001
union Select 'UK',1000011
union Select 'UK',100001111
union Select 'UK',10000111
Select * From #
Select Top 9 Contry,money From
(Select Row_Number() Over(partition by contry order by money) ID,* From # )t
Order by Id,[Money]
#5
谢了。不过
“rank()over(partition by contry order by money desc)”这句恕我才疏学浅,没有见过
#6
谢了,十分强悍
#7
谢了,十分强悍
#8
---------------------------------
-- Author: liangCK 小梁
-- Title : 查每个分组前N条记录
-- Date : 2008-11-13 17:19:23
---------------------------------
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (ID VARCHAR(3),GID INT,Author VARCHAR(29),Title VARCHAR(39),Date DATETIME)
INSERT INTO #T
SELECT '001',1,'邹建','深入浅出SQLServer2005开发管理与应用实例','2008-05-10' UNION ALL
SELECT '002',1,'胡百敬','SQLServer2005性能调校','2008-03-22' UNION ALL
SELECT '003',1,'格罗夫Groff.J.R.','SQL完全手册','2009-07-01' UNION ALL
SELECT '004',1,'KalenDelaney','SQLServer2005技术内幕存储引擎','2008-08-01' UNION ALL
SELECT '005',2,'Alex.Kriegel.Boris.M.Trukhnov','SQL宝典','2007-10-05' UNION ALL
SELECT '006',2,'飞思科技产品研发中心','SQLServer2000高级管理与开发','2007-09-10' UNION ALL
SELECT '007',2,'胡百敬','SQLServer2005数据库开发详解','2008-06-15' UNION ALL
SELECT '008',3,'陈浩奎','SQLServer2000存储过程与XML编程','2005-09-01' UNION ALL
SELECT '009',3,'赵松涛','SQLServer2005系统管理实录','2008-10-01' UNION ALL
SELECT '010',3,'黄占涛','SQL技术手册','2006-01-01'
--SQL查询如下:
--按GID分组,查每个分组中Date最新的前2条记录
--1.字段ID唯一时:
SELECT * FROM #T AS T WHERE ID IN(SELECT TOP 2 ID FROM #T WHERE GID=T.GID ORDER BY Date DESC)
--2.如果ID不唯一时:
SELECT * FROM #T AS T WHERE 2>(SELECT COUNT(*) FROM #T WHERE GID=T.GID AND Date>T.Date)
--SQL Server 2005 使用新方法
--3.使用ROW_NUMBER()进行排位分组
SELECT ID,GID,Author,Title,Date
FROM
(
SELECT rid=ROW_NUMBER() OVER(PARTITION BY GID ORDER BY Date DESC),*
FROM #T
) AS T
WHERE rid<=2
--4.使用APPLY
SELECT DISTINCT b.*
FROM #T AS a
CROSS APPLY
(
SELECT TOP(2) * FROM #T WHERE a.GID=GID ORDER BY Date DESC
) AS b
--结果
/*
ID GID Author Title Date
---- ----------- ----------------------------- --------------------------------------- -----------------------
003 1 格罗夫Groff.J.R. SQL完全手册 2009-07-01 00:00:00.000
004 1 KalenDelaney SQLServer2005技术内幕存储引擎 2008-08-01 00:00:00.000
005 2 Alex.Kriegel.Boris.M.Trukhnov SQL宝典 2007-10-05 00:00:00.000
007 2 胡百敬 SQLServer2005数据库开发详解 2008-06-15 00:00:00.000
009 3 赵松涛 SQLServer2005系统管理实录 2008-10-01 00:00:00.000
010 3 黄占涛 SQL技术手册 2006-01-01 00:00:00.000
(6 行受影响)
*/
#9
select
distinct b.*
from
tb a
cross apply
(select top 3 * from tb where contry=a.contry order by money)b