sql 建表以及查询---复杂查询之成绩排名

废话不说，直接建表

1.表Player

 USE T4st -- 设置当前数据库为T4st,以便访问sysobjects
 IF EXISTS(SELECT * FROM sysobjects WHERE name='Player')
 DROP TABLE Player
 CREATE TABLE Player
 (
   Code VARCHAR(4) PRIMARY KEY NOT NULL,
   Name VARCHAR(50),
 )
 INSERT INTO Player VALUES('','赵甲');
 INSERT INTO Player VALUES('','钱乙');
 INSERT INTO Player VALUES('','孙丙');
 INSERT INTO Player VALUES('','李丁');
 INSERT INTO Player VALUES('','周戊');
 INSERT INTO Player VALUES('','吴已');
 INSERT INTO Player VALUES('','郑庚');
 INSERT INTO Player VALUES('','王辛');
 INSERT INTO Player VALUES('','冯壬');
 INSERT INTO Player VALUES('','陈葵');

 SELECT * FROM Player
 GO

2.表Record

 USE T4st -- 设置当前数据库为T4st,以便访问sysobjects
 IF EXISTS(SELECT * FROM sysobjects WHERE name='Record')
 DROP TABLE Record
 CREATE TABLE Record
 (
   Time DATETIME PRIMARY KEY NOT NULL,
   Code VARCHAR(4),
   Height VARCHAR(5),
   Sucess VARCHAR(5)
 )
 INSERT INTO Record VALUES('2017-02-22 08:01:11','','1.80','False');
 INSERT INTO Record VALUES('2017-02-22 08:02:32','','1.71','True');
 INSERT INTO Record VALUES('2017-02-22 08:03:25','','1.81','True');
 INSERT INTO Record VALUES('2017-02-22 08:04:22','','1.90','False');
 INSERT INTO Record VALUES('2017-02-22 08:05:15','','1.90','True');
 INSERT INTO Record VALUES('2017-02-22 08:07:06','','1.90','False');
 INSERT INTO Record VALUES('2017-02-22 08:08:19','','1.91','True');
 INSERT INTO Record VALUES('2017-02-22 08:09:18','','1.92','True');
 INSERT INTO Record VALUES('2017-02-22 08:10:48','','1.81','True');
 INSERT INTO Record VALUES('2017-02-22 08:12:36','','1.79','False');

 SELECT * FROM Record
 GO

3.判定特定时间段的成绩无效

 USE T4st
 DECLARE @time1 DATETIME,@time2 DATETIME
 SET @time1 ='2017-02-22 08:03:00'
 SET @time2 ='2017-02-22 08:09:00'
 BEGIN
    SELECT * FROM Record WHERE Time > @time1 AND Time < @time2
    --判定特定时间段的成绩无效
    UPDATE Record SET Sucess='False' WHERE Time > @time1 AND Time < @time2
    SELECT * FROM Record WHERE Time > @time1 AND Time < @time2
 END
 GO

4.两表联合查询输出到一起（成绩有效者的时间，姓名，高度）

 USE T4st
 SELECT b.TIME,a.NAME,b.Height FROM Player a , Record b WHERE a.Code = b.Code AND b.Sucess='True' ORDER BY b.TIME ASC
 GO

5.两表联合查询输出到一起（主要排名冠亚季军）

 USE T4st
 SELECT c.NAME,c.SCORD,'冠军' AS DeJiang FROM (
 SELECT a.NAME,MAX(b.Height) AS SCORD,
    ROW_NUMBER() over(order by a.NAME) as ROWS
   FROM Player a , Record b WHERE a.Code = b.Code AND b.Sucess='True' GROUP BY a.NAME) c WHERE c.ROWS = ''
 UNION
 SELECT c.NAME,c.SCORD,'亚军' AS DeJiang FROM (
 SELECT a.NAME,MAX(b.Height) AS SCORD,
    ROW_NUMBER() over(order by a.NAME) as ROWS
   FROM Player a , Record b WHERE a.Code = b.Code AND b.Sucess='True' GROUP BY a.NAME) c WHERE c.ROWS = ''
 UNION
 SELECT c.NAME,c.SCORD,'季军' AS DeJiang FROM (
 SELECT a.NAME,MAX(b.Height) AS SCORD,
    ROW_NUMBER() over(order by a.NAME) as ROWS
   FROM Player a , Record b WHERE a.Code = b.Code AND b.Sucess='True' GROUP BY a.NAME) c WHERE c.ROWS = ''
 GO

运行结果如下：