基于Sql Server 2008的分布式数据库的实践（四）

数据库设计

1.E-R图

2.数据库创建

Win 7

create database V3

　　

Win 2003

create database V3

　　

3.数据表设计

Win7 创建数据表student_7

create table student_7
(
	sid int not null,
	sex nvarchar(1) not null,
	sname varchar(20) not null,
	school varchar(20) not null,
	scount varchar(20) not null,
	spwd varchar(20) not null,
	constraint pk_student_7
	primary key(sid,sex),
	constraint uq_student_7_scount
	unique(scount), 
	constraint chk_student_7_sex 
	check(sex='1') 
)

Check(sex=1)指明存放sex=1的数据，即女生。

Win2003 创建数据表student_2003

create table student_2003
(
	sid int not null,
	sex nvarchar(1) not null,
	sname varchar(20) not null,
	school varchar(20) not null,
	scount varchar(20) not null,
	spwd varchar(20) not null,
	constraint pk_student_2003
	primary key(sid,sex),
	constraint uq_student_2003_scount
	unique(scount),
 	constraint chk_student_2003_sex
	check(sex='0') 
)

Check(sex=0)指明存放sex=0的数据，即男生。

Win7 创建视图V3_student

create view V3_student 
as 
select * from student_7 
union all 
select * from [192.168.116.130].[V3].[dbo].[student_2003]

Win2003 创建视图V3_student

create view V3_student 
as 
select * from student_2003 
union all 
select * from [192.168.233.1].[V3].[dbo].[student_7]

student水平分片数据表已经建立，现在可以在任何位置，只要访问本地V3_student分布式分区视图，就实现了所有分布式数据库的操作。此时，对数据库的全局操作和局部操作就如同操作本地集中式数据库一样。

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Win7创建数据表teacher

create table teacher
(
	tid int not null,
	tname varchar(20) not null,
tage int not null,
tsex int not null,
	tcount varchar(20) not null,
	tpwd varchar(20) not null,
tsuper int not null,
	primary key(tid),
	unique(tcount)
)

Win2003创建数据表teacher

create table teacher
(
	tid int not null,
nowage int not null,
tel char(20) not null,
address varchar(80) not null,
	primary key(tid)
)

Win7 创建存储过程V3_teacher

create proc V3_teacher
(
@tid int,
@tname varchar(20),
@tage int,
@tsex int,
@tcount varchar(20),
@tpwd varchar(20),
@super int,
@nowage int ,
@tel char(20) ,
@address varchar(80)
) 
as 
set XACT_ABORT on 
BEGIN DISTRIBUTED TRANSACTION 
insert into teacher 
values(@tid,@tname,@tage,@tsex,@tcount,@tpwd,@super); 
insert into [192.168.116.130].[V3].[dbo].[teacher] 
values(@tid,@nowage,@tel,@address); 
COMMIT TRANSACTION

采用存储过程实现垂直分片。此时插入数据之后，将分别插入到不同地址上的SQL Server的teacher的数据表里面。

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Win7创建数据表class

create table class
(
	cid int not null,
	sid int not null,
tid int not null,
cname varchar(20) not null,
	score int not null,
	primary key(cid,sid)
)

本地数据表。

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Win 7:

Win2003:

4.程序代码测试

水平分片测试

垂直分片测试

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