音乐库需求分析报告
1.系统背景 ............................................................................................................................................2
2.系统功能 ............................................................................................................................................2
3.用户类和特征...................................................................................................................................3
4.用户业务流程图 ..............................................................................................................................4
1.普通用户: ...............................................................................................................................4
2.VIP 用户 .....................................................................................................................................4
3.系统管理员 ...............................................................................................................................5
4.用户视图....................................................................................................................................5
1.普通用户............................................................................................................................5
2.VIP 用户 .............................................................................................................................6
3.系统管理员.......................................................................................................................6
5.实体分析 ER 图 ................................................................................................................................7
6.数据流程图........................................................................................................................................8
7.数据库的创建...................................................................................................................................8
8.表的创建 ............................................................................................................................................9
1.歌曲信息:music information....................................................................................9
2.歌曲类型:music type..................................................................................................9
3.意见和建议:opinions ...............................................................................................10
4.用户资料:user information ....................................................................................10
5.登录信息:enter information ..................................................................................11
6.歌曲下载方式:download ways .............................................................................11
9.表格代码..........................................................................................................................................12
10.表约束的创建 ..............................................................................................................................13
11.索引创建 .......................................................................................................................................14
12.数据插入脚本 ..............................................................................................................................15
1.歌曲信息 .................................................................................................................................15
2.歌曲类型 .................................................................................................................................15
3.意见...........................................................................................................................................16
4.用户信息 .................................................................................................................................16
5.登录信息 .................................................................................................................................17
6.下载方式 .................................................................................................................................18
13.多条件查询...................................................................................................................................18
1.多重条件: ................................................................................................................................18
2.限定数据范围: .......................................................................................................................19
3.用 in 关键字限定范围: ........................................................................................................19
4.IS NULL 和 IS NOT NULL 关键字:..................................................................................20
5.模糊查询: ................................................................................................................................20
14.分组统计的使用..........................................................................................................................20
1.集合函数: ................................................................................................................................20
2.分组汇总: ................................................................................................................................20
11. 排序 ..............................................................................................................................................21
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