表结构
A月份 B姓名 C工资
200801 张三 1000.00
200801 李四 1500.00
200801 王五 1300.00
200802 张三 1050.00
200802 李四 1600.00
200802 王五 1380.00
200802 赵六 1300.00
200803.....
200804.....现要统计每个月工资排列前N位的记录,希望一条语句搞定,谢谢!!
A月份 B姓名 C工资
200801 张三 1000.00
200801 李四 1500.00
200801 王五 1300.00
200802 张三 1050.00
200802 李四 1600.00
200802 王五 1380.00
200802 赵六 1300.00
200803.....
200804.....现要统计每个月工资排列前N位的记录,希望一条语句搞定,谢谢!!
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (A月份 INT,B姓名 VARCHAR(4),C工资 NUMERIC(6,2))
INSERT INTO #T
SELECT 200801,'张三',1000.00 UNION ALL
SELECT 200801,'李四',1500.00 UNION ALL
SELECT 200801,'王五',1300.00 UNION ALL
SELECT 200802,'张三',1050.00 UNION ALL
SELECT 200802,'李四',1600.00 UNION ALL
SELECT 200802,'王五',1380.00 UNION ALL
SELECT 200802,'赵六',1300.00--SQL查询如下:SELECT DISTINCT b.*
FROM #T AS a
CROSS APPLY
(
SELECT TOP(2) *
FROM #T
WHERE A月份=a.A月份
ORDER BY C工资 DESC
) AS b/*
A月份 B姓名 C工资
----------- ---- ---------------------------------------
200801 李四 1500.00
200801 王五 1300.00
200802 李四 1600.00
200802 王五 1380.00(4 行受影响)
*/
--> 生成测试数据: #T
IF OBJECT_ID('tempdb.dbo.#T') IS NOT NULL DROP TABLE #T
CREATE TABLE #T (A月份 INT,B姓名 VARCHAR(4),C工资 NUMERIC(6,2))
INSERT INTO #T
SELECT 200801,'张三',1000.00 UNION ALL
SELECT 200801,'李四',1500.00 UNION ALL
SELECT 200801,'王五',1300.00 UNION ALL
SELECT 200802,'张三',1050.00 UNION ALL
SELECT 200802,'李四',1600.00 UNION ALL
SELECT 200802,'王五',1380.00 UNION ALL
SELECT 200802,'赵六',1300.00--SQL查询如下:SELECT *
FROM #T AS t
WHERE 2>(SELECT COUNT(*)
FROM #T
WHERE A月份=t.A月份
AND C工资>t.C工资)/*
A月份 B姓名 C工资
----------- ---- ---------------------------------------
200801 李四 1500.00
200801 王五 1300.00
200802 李四 1600.00
200802 王五 1380.00(4 行受影响)
*/
DECLARE @T TABLE(a VARCHAR(10),B NVARCHAR(10), C MONEY)
insert @t select '200801',N'张三',1000.00
INSERT @T SELECT '200801',N'李四',1500.00
INSERT @T SELECT '200801',N'王五',1300.00
INSERT @T SELECT '200802',N'张三',1050.00
INSERT @T SELECT '200802',N'李四',1600.00
INSERT @T SELECT '200802',N'王五',1380.00
INSERT @T SELECT '200802',N'赵六',1300.00
SELECT * FROM @T T WHERE CHECKSUM(*) IN (SELECT TOP 2 CHECKSUM(*) FROM @T WHERE A=T.A ORDER BY C DESC )
/*a B C
---------- ---------- ---------------------
200801 李四 1500.0000
200801 王五 1300.0000
200802 李四 1600.0000
200802 王五 1380.0000(影響 4 個資料列)*/
/**前两位
CREATE TABLE #A (S_MONTH VARCHAR(10),NAME VARCHAR(10) ,NUM INT)
INSERT #A SELECT '200801','333',1000
INSERT #A SELECT '200801','444',1500
INSERT #A SELECT '200801','555',1300
INSERT #A SELECT '200802','333',1050
INSERT #A SELECT '200802','444',1600
INSERT #A SELECT '200802','555',1380
INSERT #A SELECT '200803','333',1300
SELECT * FROM #A A
WHERE (SELECT COUNT(*) FROM #A WHERE S_MONTH=A.S_MONTH AND NUM>A.NUM)<2
DROP TABLE #A
--用rank/dense_rank
if not object_id('Tempdb..#T') is null
drop table #T
Go
Create table #T([A月份] nvarchar(6),[B姓名] nvarchar(2),[C工资] decimal(18,2))
Insert #T
select '200801',N'张三',1000.00 union all
select '200801',N'李四',1500.00 union all
select '200801',N'王五',1300.00 union all
select '200802',N'张三',1050.00 union all
select '200802',N'李四',1600.00 union all
select '200802',N'王五',1380.00 union all
select '200802',N'赵六',1300.00
Go
select
[A月份],[B姓名],[C工资]
from
(Select *,row=dense_rank()over(partition by [A月份] order by [C工资] desc) from #T a)t
where
row<=2
(7 個資料列受到影響)
A月份 B姓名 C工资
------ ---- ---------------------------------------
200801 李四 1500.00
200801 王五 1300.00
200802 李四 1600.00
200802 王五 1380.00(4 個資料列受到影響)
(
areaid int,
score int
)
insert into test select 0,10
union all select 0,20
union all select 0,30
union all select 0,40
union all select 0,50
union all select 1,10
union all select 1,20
union all select 1,30
union all select 1,40
union all select 1,50
union all select 2,10
union all select 2,20
union all select 2,30
union all select 2,40
union all select 2,50
go第一种方法适用于sql2000和2005,其代码如下:select * from test a
where checksum(*) in (select top 3 checksum(*) from test b where a.areaid=b.areaid order by score desc)第二种方法是利用sql2005的函数ROW_NUMBER,其代码如下:WITH test1 AS
(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY areaid ORDER BY score desc) AS 'RowNumber'
FROM test
)
SELECT *
FROM test1
WHERE RowNumber BETWEEN 1 AND 3;第三种方法是利用sql2005的cross apply来实现,其代码如下:select distinct t.* from test a
cross apply
(select top 3 areaid,score from test
where a.areaid=areaid order by score desc) as T