管理系统（CMS）中，合理的数据库设计对于高效存储和检索数据至关重要，以下将详细介绍一个适用于CMS的sql数据库设计方案，包括数据库结构、表设计以及相关查询示例。
怎么用JSP做个查询SQL数据库
第一步建连接：就是一java连接就行第二步是建立一个类 这类的与数据库字段对象用于java的面向对象import ;//存放数据的javabean,属性和表中的字段是一一对应的public class User { private int userid; private String username; private String password; private Date logintime;public User() { }public void setUserid(int userid) { = userid; }public void setUsername(String username) { = username; }public void setPassword(String password) { = password; }public void setLogintime(Date logintime) { = logintime; }public int getUserid() { return userid; }public String getUsername() { return username; }public String getPassword() { return password; }public Date getLogintime() { return logintime; }}第三步是建立一个SQL访问类：import .*;import .*;public class UserDAO {//按条件查找多条记录 public List findAll(String filter) {Connection conn = ();Listimport==%>然后用来访问SQL访问类调用方法获取数据
如何使用Microsoft SQL Server Management Studio来写SQL？
首先你需要打开它吧？它是SQL的DBMS图形化操作系统。 如果是想用SQL语言来操作的话呢，那就在建立好连接的基础上，然后点击窗体上面的“新建查询”按钮，然后在窗体右边会出现一块编辑区，你在编辑区域里面书写相应的SQL语句就可以。 下面是我写的一个例子，你可以参考下： 现在是建立数据库的SQL语句： use master create, size=5mb,filegrowth=15%, filename=E:\B\ ) log on (,size=1mb,maxsize=6mb,filename=E:\B\stuDB_ ) use stuDB go 下面呢，是在新建好的数据库中新建数据表： create table stuInfo ( stuName varchar(32) not null, stuNo varchar(16) not null primary key , stuSex varchar(8) not null default(男), stuAge int not null, stuSeat int not null identity(1,1), stuAddress ntext default(地址不详) ) 以下是为新建好的数据表添加约束： alter table stuInfo add constraint ck_stuNo check (stuNo like s253xx) alter table stuInfo add constraint ck_stuAge check (stuAge>=15 and stuAge<=50) 下面是给数据表添加数据： insert into stuInfo(stuName,stuNo,stuSex,stuAge,stuAddress) values(张秋丽,s,default,18,北京海淀) insert into stuInfo(stuName,stuNo,stuSex,stuAge,stuAddress) values(李斯文,s,女,22,河南洛阳) insert into stuInfo(stuName,stuNo,stuSex,stuAge,stuAddress) values(李文才,s,default,31,) insert into stuInfo(stuName,stuNo,stuSex,stuAge,stuAddress) values(欧阳骏雄,s,default,28,新疆克拉玛依) 下面是查询表中的所有数据 select *from stuInfo select stuName as 姓名,stuNo as 学号,stuSex as 性别,stuAge as 年龄,stuSeat as 座号,stuAddress as 家庭住址 from stuInfo 同样，也是新建数据表的语句块： create table stuMarks ( examNo varchar(32) not null primary key, stuNo varchar(16) not null, writtenExam int default(0), labExam int default(0) ) 添加约束： alter table stuMarks add constraint ck_examNo check (examNo like Exxxx) alter table stuMarks add constraint fk_stuNo foreign key (stuNo) references stuInfo(stuNo) alter table stuMarks add constraint ck_writtenExam check (writtenExam>0 and writtenExam<=100) alter table stuMarks add constraint ck_labExam check (labExam>0 and labExam<=100) 添加数据到数据表： insert into stuMarks(examNo,stuNo,writtenExam,labExam) values(E, s,80,58) insert into stuMarks(examNo,stuNo,writtenExam,labExam) values(E, s,50,default) insert into stuMarks(examNo,stuNo,writtenExam,labExam) values(E, s,97,82) 下面就是一些简单的查询了： select examNo as 考号,stuNo as 学号,writtenExam as 笔试成绩,labExam as 试验成绩 from stuMarks select stuName as 姓名,stuNo as 学号,stuSex as 性别,stuAge as 年龄,stuSeat as 座号,stuAddress as 家庭住址 from stuInfo select *from stuInfo where stuSex=男 order by stuSeat desc select * from stuMarks where writtenExam>75 and writtenExam<=100 order by stuNo select* from stuMarks where writtenExam <>0 and labExam <>0 select stuName,writtenExam,labExam into lingshi from stuInfo,stuMarks 以下就是SQL的聚合函数部分了： select avg(writtenExam) as 笔试平均成绩 from stuMarks select avg(labExam) as 机试平均成绩 from stuMarks select count(*) as 考试人数 from stuMarks where writtenExam>60 select count(*) as 没有通过考试的人数 from stuMarks where writtenExam<60
sql数据表如何建立
一打开企业管理器直接选中数据库,右键,选中新建表或者二,打开查询分析器,编辑如CREATE TABLE A (AB VARCHAR (20) NOT NULL,AC VARCHAR (64) NOT NULL,AD CHAR (1) NOT NULL);ALTER TABLE A ADDCONSTRAINT PK_A PRIMARY KEY(AB);
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