MySchool 05 租房网项目

 USE MASTER
 GO
 EXEC XP_CMDSHELL 'MKDIR E:\HOUSE1'
 GO
 SET NOCOUNT ON----不显示影响行数
 IF EXISTS(SELECT * FROM SYS.DATABASES WHERE NAME='HOUSE')
 DROP DATABASE HOUSE
 GO
 ----创建数据库HOUSE
 CREATE DATABASE HOUSE
 ON
 (NAME='HOUSE_DATA',
 FILENAME='E:\HOUSE1\HOUSE_DATA.MDF',
 SIZE=3,FILEGROWTH=1
 )
 LOG ON
 (NAME='HOUSE_LOG',
 FILENAME='E:\HOUSE1\HOUSE_DATA.LDF',
 SIZE=10,FILEGROWTH=10%
 )
 GO
 /*------创建表-----------*/
 --------建表:sys_user(用户信息表)
 USE HOUSE
 GO
 IF EXISTS(SELECT * FROM SYS.OBJECTS WHERE NAME='sys_user')
 DROP TABLE sys_user
 GO
 CREATE TABLE sys_user
 (UID INT IDENTITY (1,1) NOT NULL,---用户编号
 UNAME VARCHAR(20) NOT NULL ,---姓名
 UPASSWORD VARCHAR(20) NOT NULL---密码
 )
 GO
 ------建表sys_user的约束
 ALTER TABLE sys_user
 ADD CONSTRAINT PK_UID PRIMARY KEY (UID),
     CONSTRAINT CK_UPASSWORD CHECK(LEN(UPASSWORD)>6)
 GO
 -----建表hos_district
 IF EXISTS( SELECT * FROM SYS.OBJECTS WHERE NAME='hos_district')
 DROP TABLE hos_district
 GO
 CREATE TABLE hos_district
 (
 DID INT IDENTITY (1,1) PRIMARY KEY NOT NULL ,---区县编号(主键)
 DNAME VARCHAR(20) NOT NULL ----区县名称
 )
 GO
 ----建表hos_street
 IF EXISTS (SELECT * FROM SYS.OBJECTS WHERE NAME='hos_street')
 DROP TABLE hos_street
 GO
 CREATE TABLE hos_street
 (
 SID INT IDENTITY(1,1) PRIMARY KEY  NOT NULL,---街道编号(主键)
 SNAME VARCHAR(100) NOT NULL,---街道名称
 SDID INT FOREIGN KEY (SDID)  REFERENCES hos_district (DID) NOT NULL
 )
 GO
 -----建表hos_type
 IF EXISTS (SELECT * FROM SYS.OBJECTS WHERE NAME='hos_type')
 DROP TABLE hos_type
 GO
 CREATE TABLE hos_type
 (
 HTID INT IDENTITY(1,1) PRIMARY KEY NOT NULL,----房屋类型编号(主键)
 HTNAME VARCHAR(20) NOT NULL ---房屋类型
 )
 GO
 -----建表：hos_house
 IF EXISTS(SELECT * FROM SYS.OBJECTS WHERE NAME='hos_house')
 DROP TABLE hos_house
 GO
 CREATE TABLE hos_house
 (
 HMID INT IDENTITY(1,1) NOT NULL,---(房屋信息编号)
 UID INT NOT NULL,----用户编号
 --DID INT NOT NULL,----区县编号
 SID INT NOT NULL,----街道编号
 HTID INT NOT NULL,---房屋类型编号
 PRICE  DECIMAL(18,2) NOT NULL,--价格
 TOPIC VARCHAR(20) NOT NULL,---标题
 CONTENTS VARCHAR(100) NOT NULL,---描述
 HTIME DATETIME NOT NULL,---发布时间
 COPY VARCHAR(20) ---备注
 )
 GO
 -----添加约束(house)
 ALTER TABLE hos_house
 ADD CONSTRAINT PK_HMID PRIMARY KEY (HMID),
     CONSTRAINT DF_PRICE DEFAULT(0) FOR PRICE,
     CONSTRAINT CK_PRICE CHECK(PRICE>0),
     CONSTRAINT DF_HTIME DEFAULT(GETDATE()) FOR HTIME,
     CONSTRAINT CK_HTIME CHECK(HTIME<=GETDATE()),
     CONSTRAINT FK_UID FOREIGN KEY (UID) REFERENCES sys_user(UID) ,
    -- CONSTRAINT FK_DID FOREIGN KEY (DID) REFERENCES hos_district(DID),
     CONSTRAINT FK_SID FOREIGN KEY (SID) REFERENCES hos_street (SID),
     CONSTRAINT FK_HTID FOREIGN KEY(HTID) REFERENCES hos_type(HTID)
 GO
 --------添加测试数据
 -----sys_user插入数据
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('张三','s217701')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('李四','s217702')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('王鑫','s217703')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('张建','s217704')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('李剑','s217705')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('蒋以然','s217706')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('王晓超','s217707')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('张冬雪','s217708')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('孙鹏','s217709')
 INSERT INTO sys_user(UNAME,UPASSWORD) VALUES('蒋连昌','s217710')
 GO
 -----表hos_district插入数据
 INSERT INTO hos_district (DNAME) VALUES('海淀区')
 INSERT INTO hos_district (DNAME) VALUES('西城区')
 INSERT INTO hos_district (DNAME) VALUES('东城区')
 INSERT INTO hos_district (DNAME) VALUES('朝阳区')
 INSERT INTO hos_district (DNAME) VALUES('景山区')
 INSERT INTO hos_district (DNAME) VALUES('宣武区')
 INSERT INTO hos_district (DNAME) VALUES('大兴')
 INSERT INTO hos_district (DNAME) VALUES('丰台')
 GO
 ----表hos_street插入数据
 INSERT INTO hos_street (SNAME,SDID) VALUES('中关村',1)
 INSERT INTO hos_street (SNAME,SDID) VALUES('苏州街',1)
 INSERT INTO hos_street (SNAME,SDID) VALUES('万泉庄',1)
 INSERT INTO hos_street (SNAME,SDID) VALUES('东四',3)
 INSERT INTO hos_street (SNAME,SDID) VALUES('东单',3)
 INSERT INTO hos_street (SNAME,SDID) VALUES('西四',2)
 INSERT INTO hos_street (SNAME,SDID) VALUES('西单',2)
 INSERT INTO hos_street (SNAME,SDID) VALUES('东湖',4)
 INSERT INTO hos_street (SNAME,SDID) VALUES('八里庄',4)
 INSERT INTO hos_street (SNAME,SDID) VALUES('双井',5)
 INSERT INTO hos_street (SNAME,SDID) VALUES('陶然亭',5)
 INSERT INTO hos_street (SNAME,SDID) VALUES('南菜园',6)
 INSERT INTO hos_street (SNAME,SDID) VALUES('兴丰街',7)
 INSERT INTO hos_street (SNAME,SDID) VALUES('黄村',7)
 INSERT INTO hos_street (SNAME,SDID) VALUES('南苑街',8)
 INSERT INTO hos_street (SNAME,SDID) VALUES('东铁营',8)
 GO
 -----表hos_type插入数据
 INSERT INTO hos_type (HTNAME) VALUES('一室一卫')
 INSERT INTO hos_type (HTNAME) VALUES('一室一厅')
 INSERT INTO hos_type (HTNAME) VALUES('两室一卫')
 INSERT INTO hos_type (HTNAME) VALUES('两室一厅')
 INSERT INTO hos_type (HTNAME) VALUES('三室一厅')
 INSERT INTO hos_type (HTNAME) VALUES('三室两厅')
 GO
 ----表hos_house插入数据
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(1,1,2,2600,'中关村','中关村一条街','2009-1-2','中关村')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(2,2,3,3600,'苏州街','苏州街一条街','2009-1-3','苏州街')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(3,3,4,4600,'万泉庄','万泉庄一条街','2009-1-4','万泉庄')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(1,3,2,1500,'万泉庄附近','万泉庄附近一条街','2009-7-2','万泉庄附近')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(1,5,2,2700,'东单','东单很多美食','2009-9-2','东单')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(3,1,2,2600,'中关村','中关村电脑城','2009-4-1','中关村')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(4,4,1,2000,'东四','东四一条街','2009-4-2','东四')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(5,6,3,3600,'西四','西四一条街','2009-1-2','西四')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(5,7,2,3600,'西单','西单购物城','2009-4-2','西单')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(6,2,2,2600,'苏州街','苏州街美食','2009-2-2','苏州街')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(7,8,3,2900,'朝阳东湖','朝阳东湖一景','2009-3-2','朝阳')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(8,3,1,700,'万泉庄','万泉庄一条街','2009-5-2','万泉庄')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(3,2,3,4200,'苏州街','苏州街二条街','2009-1-3','苏州街')
 INSERT INTO hos_house(UID,SID,HTID,PRICE,TOPIC,CONTENTS,HTIME,COPY)
 VALUES(4,2,3,4100,'苏州街','苏州街西街','2009-1-3','苏州街')



 GO

 [sql] view plain copy 在CODE上查看代码片派生到我的代码片
 use HOUSE
 select * from hos_house  --房间信息表
 select * from hos_district  --区县表
 select * from hos_street    --街道表
 select * from hos_type    --房间类型表

 --1.内容扩充：临时表
 --如果表名前面有#，那么创建的表是临时表，位于tempdb数据库下
 --的临时表文件夹下。
 create table #mytemp2222
 (
   id int identity(1,1) primary key not null,
   name nvarchar(20)
 )
   --使用临时表的好处：临时表中的数据当我们断开连接后自动释放，这样
   --可以节省数据库服务器的空间

 --任务一：分页显示查询出租房信息

 --经典分页思路(一、双top，双order by 二、Row_number()函数  三、临时表方式(和Row_Number()原理一致))
 --将出租房屋记录批量插入临时表

 --*******************方式一：双top，双order by分页************************
 --查询输出第6条~第10条房屋出租信息

 --did:区县编号(hos_district)

 select top 5 *,hos_district.did
 from hos_house,hos_street,hos_district
 where  hmid
 not in(select top 5 hmid from hos_house)
 and hos_house.sid=hos_street.sid
 and hos_street.sdid=hos_district.did

 --*******************方式二：Row_Number() over(order by id)***************
 select * from
 (select *,row_number() over(order by hmid) as myid
 from hos_house) as temp
 where myid between 6 and 10
 --*******************方式三：临时表分页***********************************
 --查询输出第6条~第10条房屋出租信息
 use house
 select identity(int,1,1) as myid, UID, SID, HTID, PRICE, TOPIC, CONTENTS, HTIME, COPY
 into #housetemp
 from hos_house
 --通过临时表我们发现，其实实现分页只有两中思路，一种是通过双top，双order by方式，
 --另外一种方式就是用一定的手段(可以使系统提供Row_NUmber()函数，也
 --可以通过identity(int,1,1)来产生)，在现有表上加上一个自动增长列。
 select * from #housetemp
 where myid between 6 and 10
 --如何将临时表释放
 drop table #housetemp
 --练习2——查询指定客户发布的出租房屋信息
 --需求说明::
 --查询“张三”发布的所有出租房屋信息，并显示房屋分布的街道、区县

 select DNAME as 区县,SNAME as 街道,HTNAME as 户型,price as 价格,topic as 标题,contents as 描述,htime as 时间,copy as 备注
 from hos_district,
 hos_street,
 hos_type,
 hos_house
 where hos_house.sid=hos_street.sid
 and hos_house.htid=hos_type.htid
 and hos_street.sdid=hos_district.did
 and uid=
 (
   select uid from sys_user
   where uname='张三'
 )
 --阶段3：练习——按区县制作房屋出租清单
 --根据户型和房屋所在区县和街道,为至少有2个街道有房屋出租的区县制作出租房屋清单
 --方式一(推荐)：
 select HTNAME as 户型,UNAME as 姓名,DNAME as 区县, SNAME as 街道
 from hos_type,sys_user,hos_district,hos_street,hos_house
 where hos_house.sid=hos_street.sid
 and hos_type.htid=hos_house.htid
 and sys_user.uid=hos_house.uid
 and hos_district.did=hos_street.sdid
 and hos_street.sdid in
 (
   select  hos_street.sdid
   from  hos_street,hos_district,
   (select distinct sid from hos_house) as temp
   where hos_street.sid=temp.sid
   and hos_street.sdid=hos_district.did
   group by hos_street.sdid
   having count(hos_street.sid)>=2
 )

 --方式二：
 select HTNAME as 户型,UNAME as 姓名,DNAME as 区县, SNAME as 街道
 from hos_type,sys_user,hos_district,hos_street,hos_house
 where hos_house.sid=hos_street.sid
 and hos_type.htid=hos_house.htid
 and sys_user.uid=hos_house.uid
 and hos_district.did=hos_street.sdid
 and hos_house.SID in
 (
   select hos_street.SID
   from hos_street
   where sdid in
   (
     select sdid
     from hos_street,(select distinct(SID) from hos_house) as temp
    where hos_street.sid=temp.sid
    group by sdid
   having count(hos_street.SID)>=2
   )
 )


 --阶段4：按季度统计本年发布的房屋出租数量
 --要求输出本年1月1日至今的全部出租房屋数量，各区县
 --出租房屋数量以及各街道、户型出租房屋数量。
 use house
 DECLARE @year int
 --SET @year = DATEPART(yy,GETDATE())
 set @year=2009

 SELECT tmp.quarter AS '季度',hos_district.DNAME AS '区县',hos_street.SNAME AS '街道',
 hos_type.HTNAME AS '户型',tmp.cnt AS '房屋数量'
 FROM (
   SELECT SID,HTID,COUNT(*) cnt,DATEPART(qq,HTIME) quarter
   FROM hos_house
   WHERE DATEPART(yy,HTIME)=@year
   GROUP BY DATEPART(qq,HTIME),SID,HTID
 ) tmp
 --INNER JOIN sys_user ON (tmp.UID=sys_user.UID)
 INNER JOIN hos_street ON(tmp.SID=hos_street.SID)
 INNER JOIN hos_district ON(hos_street.SDID=hos_district.DID)
 INNER JOIN hos_type ON(tmp.HTID=hos_type.HTID)


 UNION

 SELECT DATEPART(qq,HTIME),hos_district.DNAME,' 小计 ','  ',COUNT(*) AS '房屋数量'
 FROM hos_house
 INNER JOIN hos_street ON(hos_house.SID=hos_street.SID)
 INNER JOIN hos_district ON(hos_street.SDID=hos_district.DID)
 WHERE DATEPART(yy,HTIME)=@year
 GROUP BY DATEPART(qq,HTIME),hos_district.DNAME

 union

 SELECT DATEPART(qq,HTIME),' 合计 ','  ','  ',COUNT(*) AS '房屋数量'
 FROM hos_house
 WHERE DATEPART(yy,HTIME)=@year
 GROUP BY DATEPART(qq,HTIME)