急求一条存储过程或sql语句 马上结贴

[bulenghai]

问题是这样：我的新闻页里面要展示五天的新闻，其中每天的展示5条。参数只传今天的时间。请问一条sql语句如何实现？

[beirut012]

Select *
FROM orders A
Where EXISTS
          (Select COUNT(1)
         FROM orders
         Where employeeid = A.employeeid AND orderid > A.orderid
         HAVING COUNT(1) < 5)
ORDER BY EmployeeID

[luoyoumou]

-- 如有表：
news_tb(
nid int,             -- 新闻ID
title varchar(1000), -- 新闻标题
content text,        -- 新闻内容
cdate datetime       -- 创建日期
)

-- 每天的展示5条，这5条有什么取数规则没？

[htl258_Tony]

CREATE PROC p_test 
@dt DATETIME
AS
SELECT * 
FROM tb t
WHERE datecol IN (
	SELECT TOP 5 datecol 
	FROM tb
	WHERE DATEDIFF(dd, datecol, t.datecol) = 0
	)
	AND DATEDIFF(dd, datecol, @dt) BETWEEN 0 AND 4
GO

[hdh9988]

表结构在哪里呀？

[beirut012]

---------------------------------
-- 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)
*/

 

[luoyoumou]

drop table news_tb;

create table news_tb(
nid int,             -- 新闻ID
title varchar(1000), -- 新闻标题
contents text,        -- 新闻内容
cdate datetime       -- 创建日期
)

INSERT INTO news_tb(nid,title,contents,cdate)
SELECT 
1,'你究竟有几个好妹妹','我有几个好妹妹呢？......','2010-05-30' UNION ALL SELECT
2,'富土康的跳楼内幕','众所周知,.....','2010-05-31' UNION ALL SELECT
3,'天上人间到底是在天上还是在人间？','众所周知,.....','2010-05-31' UNION ALL SELECT
4,'论富土康的12跳','众所周知,.....','2010-05-31' UNION ALL SELECT
5,'论富土康的13跳','众所周知,.....','2010-05-31' UNION ALL SELECT
6,'论富土康的14跳','众所周知,.....','2010-05-31' UNION ALL SELECT
7,'论富土康的15跳','众所周知,.....','2010-05-31' UNION ALL SELECT
8,'论富土康的16跳','众所周知,.....','2010-05-31' UNION ALL SELECT
9,'论富土康的17跳','众所周知,.....','2010-05-31' UNION ALL SELECT
10,'论富土康的18跳','众所周知,.....','2010-06-01' UNION ALL SELECT
11,'论富土康的19跳','众所周知,.....','2010-06-01' UNION ALL SELECT
12,'论富土康的20跳','众所周知,.....','2010-06-01' UNION ALL SELECT
13,'论富土康的21跳','众所周知,.....','2010-06-01' UNION ALL SELECT
14,'论富土康的22跳','众所周知,.....','2010-06-02' UNION ALL SELECT
15,'论富土康的23跳','众所周知,.....','2010-06-02' UNION ALL SELECT
16,'论富土康的24跳','众所周知,.....','2010-06-02' UNION ALL SELECT
17,'论富土康的25跳','众所周知,.....','2010-06-03' UNION ALL SELECT
18,'论富土康的26跳','众所周知,.....','2010-06-03' UNION ALL SELECT
19,'论富土康的27跳','众所周知,.....','2010-06-03' UNION ALL SELECT
20,'论富土康的28跳','众所周知,.....','2010-06-03' UNION ALL SELECT
21,'论富土康的29跳','众所周知,.....','2010-06-04' UNION ALL SELECT
22,'论富土康的30跳','众所周知,.....','2010-06-04' UNION ALL SELECT
23,'论富土康的31跳','众所周知,.....','2010-06-05' UNION ALL SELECT
24,'论富土康的32跳','众所周知,.....','2010-06-05' UNION ALL SELECT
25,'论富土康的33跳','众所周知,.....','2010-06-05' UNION ALL SELECT
26,'论富土康的34跳','众所周知,.....','2010-06-05' UNION ALL SELECT
27,'好消息：富土康的员工已全部跳楼身亡!!!','众所周知,.....','2010-06-05';



CREATE PROCEDURE news_first5_pDay
AS
BEGIN
  SELECT rcn, title, contents, cdate
  FROM (SELECT row_number() over(partition by convert(varchar(10),cdate,120) ORDER BY cdate ) rcn,
               title, contents, cdate
		  FROM news_tb
		 WHERE cdate >= convert(varchar(10),(getdate()-5),120) ) t
  WHERE t.rcn<=5;

END;


EXEC news_first5_pDay;