简单BBS数据库的设计

基本信息表

BBSUsers 表
--------------------------------------------------------------------------------------------- 属性名称 类型 长度 备注
UID varchar 16 用户账号------>（主键）
UName varchar 50 用户名
UpassWord varchar 16 账户密码
UEmail varchar 50 邮箱
UBirthday smalldate 生日
USex nvarchar 4 性别------> in（男，女，保密）
UClass int 账户级别 ------>（0级）
UStatement nvarchar 100 个性签名
BBSSession表
--------------------------------------------------------------------------------------------- SID varchar 16 版块ID--> 主键
SName nvarchar 50 版块名称
Smaster varchar 16 用户ID
Sclickcount long 20 点击率 ------>（默认0）
STopiccunt long 20 主题点击率------>（默认0）
SStatement nvarchar 50 版块简介
--------------------------------------------------------------------------------------------- BBStopic表
--------------------------------------------------------------------------------------------- TID varchar 16 主题编号------>主键
TNumber int 自增变量
TSID varchar 16 版块ID
TUID varchar 16 用户ID
TReplycount int 回帖数------>默认0
TEmotion nvarchar 16 心情------>空
TTopic n varchar 50 主题题目
TContent text 帖子内容
TTime datetime 发帖时间 ------>getdate（）
TClickcount long 20 点击率 ------>默认为0
TFlag nvarchar 16 标签
TLastclick datetime 最后浏览时间 ------>getdate（）
--------------------------------------------------------------------------------------------- BBSReplay表
--------------------------------------------------------------------------------------------- RID varchar 16 楼主ID------>
RNumber int 自增变量
RTID varchar 16 帖子ID
RSID varchar 16 版块ID
RUID varchar 16 用户ID
REmotion n varchar 16 心情------>空
RTopic nvarchar 50 帖子主题
RContents text 回复内容
RTime datetime 回复时间------>getdate（）
RClickcount int 回复点击数 ------>默认0
---------------------------------------------------------------------------------------------

Sql 语句

--------------------------创建数据库---------------------------------use master
go
if exists(select * from sysdatabases where name='BBSDB')
Drop database BBSDB
create database BBSDB
on primary
(
name='BBSDB_data',
FileName='E:/SQLData/BBSDB_data.mdf',
Size=5mb,
Maxsize=1GB,
Filegrowth=10%
)
log on
(
name='BBSDB_log',
FileName='E:/SQLData/BBSDB_log.ldf',
Size=5mb,
Maxsize=500mb,
Filegrowth=20%
)
go
--------------------------创建数据BBSUsers表-------------------------/*---------------------------------------------------------------- 属性名称 类型 长度 备注
UID varchar 16 用户账号------>（主键）
UName varchar 50 用户名
UpassWord varchar 16 账户密码
UEmail varchar 50 邮箱
UBirthday smalldate 生日
USex varchar 4 性别------> in（男，女，保密）
UClass int 账户级别 ------>（0级）
UStatement nvarchar 100 个性签名
-----------------------------------------------------------------*/
use BBSDB
if exists(select * from sysobjects where name='BBSUsers')
drop table BBSUsers
create table BBSUsers
(
UID varchar(16) not null,
UName varchar(50) not null,
Upassword varchar(16)not null,
UEmail varchar (50) not null,
UBirthday smalldatetime,
USex varchar (4) not null,
UClass int not null,
UStatement nvarchar
)
go
--------------------------创建数据BBSSession表------------------------/*---------------------------------------------------------------- SID varchar 16 版块ID--> 主键
SName varchar 50 版块名称
Smaster varchar 16 用户ID
Sclickcount long 20 点击率 ------>（默认0）
STopiccunt long 20 主题点击率------>（默认0）
SStatement nvarchar 50 版块简介
----------------------------------------------------------------- */
if exists(select * from sysobjects where name='BBSSession')
drop table BBSSession
create table BBSSession
(
SID varchar(16) not null,
SName varchar(50) not null,
Smaster varchar(16)not null,
Sclickcount int not null,
STopiccunt int not null,
SStatement nvarchar (50) not null
)
go
--------------------------创建数据BBStopic表-----------------------------------
/*---------------------------------------------------------------- TID varchar 16 主题编号------>主键
TNumber int 自增变量
TSID varchar 16 版块ID
TUID varchar 16 用户ID
TReplycount int 回帖数------>默认0
TEmotion nvarchar 16 心情------>空
TTopic nvarchar 50 主题题目
TContent text 帖子内容
TTime datetime 发帖时间 ------>getdate（）
TClickcount int 点击率 ------>默认为0
TFlag varchar 16 标签
TLastclickt datetime 最后浏览时间 ------>getdate（）
-----------------------------------------------------------------*/
if exists(select * from sysobjects where name='BBStopic')
drop table BBStopic
create table BBStopic
(
TID varchar(16) not null,
TNumber int identity(1,1) not null,
TSID varchar(16)not null,
TUID varchar(16) not null,
TReplycount int not null,
TEmotion nvarchar (16) not null,
TTopic nvarchar(50) not null,
TContent text not null,
TTime datetime not null,
TClickcount int not null,
TFlag nvarchar(16)not null,
TLastclickt datetime not null,

)
go
--------------------------创建数据BBSReplay表------------------------/*----------------------------------------------------------------- RID varchar 16 楼主ID
RNumber int 自增变量
RTID varchar 16 帖子ID
RSID varchar 16 版块ID
RUID varchar 16 用户ID
REmotion nvarchar 16 心情------>空
RTopic nvarchar 50 帖子主题
RContents text 回复内容
RTime datetime 回复时间------>getdate（）
RClickcount int 回复点击数 ------>默认0
-----------------------------------------------------------------*/
if exists(select * from sysobjects where name='BBSReplay')
drop table BBSReplay
create table BBSReplay
(
RID varchar(16) not null,
RNumber int identity(1,1) not null,
RTID varchar(16)not null,
RSID varchar(16) not null,
RUID varchar(16) not null,
TEmotion nvarchar (16),
RTopic nvarchar(50) not null,
RContents text not null,
RTime datetime not null,
RClickcount int not null,
)
go
--------------------------为BBSUsers表创建约束-----------------------/*----------------------------------------------------------------- 属性名称 类型 长度 备注
UID varchar 16 用户账号------>（主键）
UName varchar 50 用户名
UpassWord varchar 16 账户密码
UEmail varchar 50 邮箱
UBirthday smalldate 生日
USex varchar 4 性别------> in（男，女，保密）
UClass int 账户级别 ------>（0级）
UStatement nvarchar 100 个性签名
-----------------------------------------------------------------*/
------------------创建主键约束-------->PK_BBSUSERS_UID
if exists(select * from sysobjects where name='PK_BBSUSERS_UID')
alter table BBSUsers drop constraint PK_BBSUSERS_UID
alter table BBSUsers add constraint PK_BBSUSERS_UID
primary key(UID)
go
------------------创建检查约束-------->CK_BBSUSERS_USEX
if exists(select * from sysobjects where name='CK_BBSUSERS_USEX')
alter table BBSUsers drop constraint CK_BBSUSERS_USEX
alter table BBSUsers add constraint CK_BBSUSERS_USEX
check(USex in('男','女','保密'))
go
------------------创建默认约束-------->DF_BBSUSERS_USEX
if exists(select * from sysobjects where name='DF_BBSUSERS_USEX')
alter table BBSUsers drop constraint DF_BBSUSERS_USEX
alter table BBSUsers add constraint DF_BBSUSERS_USEX
default('保密') for USex
go
------------------创建默认约束-------->DF_BBSUSERS_UCLASS
if exists(select * from sysobjects where name='DF_BBSUSERS_UCLASS')
alter table BBSUsers drop constraint DF_BBSUSERS_UCLASS
alter table BBSUsers add constraint DF_BBSUSERS_UCLASS
default('0级') for UClass
go

---------------------------------------------------------------------------------------------为BBSSession表创建约束----------------------/*----------------------------------------------------------------- SID varchar 16 版块ID--> 主键
SName varchar 50 版块名称
Smaster varchar 16 用户ID
Sclickcount long 20 点击率 ------>（默认0）
STopiccunt long 20 主题点击率------>（默认0）
SStatement nvarchar 50 版块简介
----------------------------------------------------------------------------- */
------------------创建主键约束-------->PK_BBSSESSION_SID
if exists(select * from sysobjects where name='PK_BBSSESSION_SID')
alter table BBSSession drop constraint PK_BBSSESSION_SID
alter table BBSSession add constraint PK_BBSSESSION_SID
primary key(SID)
go
------------------创建默认约束-------->DF_BBSSESSION_SCLICKCONUT
if exists(select * from sysobjects where name='DF_BBSSESSION_SCLICKCONUT')
alter table BBSSession drop constraint DF_BBSSESSION_SCLICKCONUT
alter table BBSSession add constraint DF_BBSSESSION_SCLICKCONUT
default(0) for Sclickcount
go
------------------创建默认约束-------->DF_BBSSESSION_STOPICCONUT
if exists(select * from sysobjects where name='DF_BBSSESSION_STOPICCONUT')
alter table BBSSession drop constraint DF_BBSSESSION_STOPICCONUT
alter table BBSSession add constraint DF_BBSSESSION_STOPICCONUT
default(0) for STopiccunt
go
------------------创建外键约束-------->FK_BBSSESSION_SMASTER
if exists(select * from sysobjects where name='FK_BBSSESSION_SMASTER')
alter table BBSSession drop constraint FK_BBSSESSION_SMASTER
alter table BBSSession add constraint FK_BBSSESSION_SMASTER
foreign key(Smaster) references BBSUsers (UID)
go

--------------------------为BBStopic表创建约束------------------------/*----------------------------------------------------------------- TID varchar 16 主题编号------>主键
TNumber int 自增变量
TSID varchar 16 版块ID
TUID varchar 16 用户ID
TReplycount int 回帖数------>默认0
TEmotion nvarchar 16 心情------>空
TTopic nvarchar 50 主题题目
TContent text 帖子内容
TTime datetime 发帖时间 ------>getdate（）
TClickcount int 点击率 ------>默认为0
TFlag varchar 16 标签
TLastclickt datetime 最后浏览时间 ------>getdate（）
-----------------------------------------------------------------*/
------------------创建主键约束-------->PK_BBSTOPIC_TID
if exists(select * from sysobjects where name='PK_BBSTOPIC_TID')
alter table BBStopic drop constraint PK_BBSTOPIC_TID
alter table BBStopic add constraint PK_BBSTOPIC_TID
primary key(TID)
go
------------------创建默认约束-------->PK_BBSTOPIC_TREPLYCOUNT
if exists(select * from sysobjects where name='PK_BBSTOPIC_TREPLYCOUNT')
alter table BBStopic drop constraint PK_BBSTOPIC_TREPLYCOUNT
alter table BBStopic add constraint PK_BBSTOPIC_TREPLYCOUNT
default(0) for TReplycount
go
------------------创建默认约束-------->PK_BBSTOPIC_TCLICKCOUNT
if exists(select * from sysobjects where name='PK_BBSTOPIC_TCLICKCOUNT')
alter table BBStopic drop constraint PK_BBSTOPIC_TCLICKCOUNT
alter table BBStopic add constraint PK_BBSTOPIC_TCLICKCOUNT
default(0) for TClickcount
go
------------------创建默认约束-------->DF_BBSTOPIC_TTIME
if exists(select * from sysobjects where name='DF_BBSTOPIC_TTIME')
alter table BBStopic drop constraint DF_BBSTOPIC_TTIME
alter table BBStopic add constraint DF_BBSTOPIC_TTIME
default(getdate()) for TTime
go
------------------创建默认约束-------->DF_BBSTOPIC_TLASTCLICKT
if exists(select * from sysobjects where name='DF_BBSTOPIC_TLASTCLICKT')
alter table BBStopic drop constraint DF_BBSTOPIC_TLASTCLICKT
alter table BBStopic add constraint DF_BBSTOPIC_TLASTCLICKT
default(getdate()) for TLastclickt
go
------------------创建外键约束-------->FK_BBSTOPIC_TUID
if exists(select * from sysobjects where name='FK_BBSTOPIC_TUID')
alter table BBStopic drop constraint FK_BBSTOPIC_TUID
alter table BBStopic add constraint FK_BBSTOPIC_TUID
foreign key(TUID) references BBSUsers (UID)
go
------------------创建外键约束-------->FK_BBSTOPIC_TSID
if exists(select * from sysobjects where name='FK_BBSTOPIC_TSID')
alter table BBStopic drop constraint FK_BBSTOPIC_TSID
alter table BBStopic add constraint FK_BBSTOPIC_TSID
foreign key(TSID) references BBSSession (SID)
go
--------------------------为BBSReplay表创建约束

/*----------------------------------------------------------------- RID varchar 16 楼主ID
RNumber int 自增变量
RTID varchar 16 帖子ID
RSID varchar 16 版块ID
RUID varchar 16 用户ID
REmotion nvarchar 16 心情------>空
RTopic nvarchar 50 帖子主题
RContents text 回复内容
RTime datetime 回复时间------>getdate()
RClickcount int 回复点击数 ------>默认0
-----------------------------------------------------------------*/
------------------创建主键约束-------->PK_BBSREPLAY_RID
if exists(select * from sysobjects where name='PK_BBSREPLAY_RID')
alter table BBSReplay drop constraint PK_BBSREPLAY_RID
alter table BBSReplay add constraint PK_BBSREPLAY_RID
primary key(RID)
go
------------------创建默认约束-------->DF_BBSREPLAY_RTIME
if exists(select * from sysobjects where name='DF_BBSREPLAY_RTIME')
alter table BBSReplay drop constraint DF_BBSREPLAY_RTIME
alter table BBSReplay add constraint DF_BBSREPLAY_RTIME
default(getdate()) for RTime
go
------------------创建默认约束-------->PK_BBSREPLAY_RCLICKCOUNT
if exists(select * from sysobjects where name='PK_BBSREPLAY_RCLICKCOUNT')
alter table BBSReplay drop constraint PK_BBSREPLAY_RCLICKCOUNT
alter table BBSReplay add constraint PK_BBSREPLAY_RCLICKCOUNT
default(0) for RClickcount
go
------------------创建外键约束-------->FK_BBSREPLAY_RTID
if exists(select * from sysobjects where name='FK_BBSREPLAY_RTID')
alter table BBSReplay drop constraint FK_BBSREPLAY_RTID
alter table BBSReplay add constraint FK_BBSREPLAY_RTID
foreign key(RTID) references BBSTopic (TID)
go
------------------创建外键约束-------->FK_BBSREPLAY_RSID
if exists(select * from sysobjects where name='FK_BBSREPLAY_RSID')
alter table BBSReplay drop constraint FK_BBSREPLAY_RSID
alter table BBSReplay add constraint FK_BBSREPLAY_RSID
foreign key(RSID) references BBSSession (SID)
go
------------------创建外键约束-------->FK_BBSREPLAY_RUID
if exists(select * from sysobjects where name='FK_BBSREPLAY_RUID')
alter table BBSReplay drop constraint FK_BBSREPLAY_RUID
alter table BBSReplay add constraint FK_BBSREPLAY_RUID
foreign key(RUID) references BBSUsers(UID)
go