Description: The following into the subject, first of all, I personally contacted by the procedural to the database designers to look at the foundation: 1, there is no systematic study of programmers over the data structure. Such works often programmers just improvise their toys, they are often used to design only a limited number of tables, the realization of all the data in certain types of features in a side table, the table is almost no connection between. A lot of free online management software is such a thing, when the program features a limited, small amount of data when the program up and running without any problems, but if its management is more important to use the data, very large risks.
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Dbm
...\Database
...\........\bin
...\........\...\Debug
...\........\...\.....\Database.dll
...\........\...\.....\Database.pdb
...\........\Database.csproj
...\........\obj
...\........\...\Database.csproj.FileList.txt
...\........\...\Debug
...\........\...\.....\Database.dll
...\........\...\.....\Database.pdb
...\........\...\.....\TempPE
...\........\Properties
...\........\..........\AssemblyInfo.cs
...\........\QueryDatabase.cs
...\Dbm
...\...\bin
...\...\...\Debug
...\...\...\.....\Dbm.exe
...\...\...\.....\Dbm.pdb
...\...\...\.....\Dbm.vshost.exe
...\...\Dbm.csproj
...\...\DeleteDatabase.cs
...\...\Form1.cs
...\...\Form1.Designer.cs
...\...\Form1.resx
...\...\InsertDatabase.cs
...\...\Modify.cs
...\...\ModifyFrom.cs
...\...\ModifyFrom.Designer.cs
...\...\ModifyFrom.resx
...\...\obj
...\...\...\Dbm.csproj.FileList.txt
...\...\...\Debug
...\...\...\.....\Dbm.csproj.GenerateResource.Cache
...\...\...\.....\Dbm.exe
...\...\...\.....\Dbm.Form1.resources
...\...\...\.....\Dbm.pdb
...\...\...\.....\Dbm.Properties.Resources.resources
...\...\...\.....\modify.ModifyFrom.resources
...\...\...\.....\Refactor
...\...\...\.....\TempPE
...\...\...\.....\......\Properties.Resources.Designer.cs.dll
...\...\Program.cs
...\...\Properties
...\...\..........\AssemblyInfo.cs
...\...\..........\Resources.Designer.cs
...\...\..........\Resources.resx
...\...\..........\Settings.Designer.cs
...\...\..........\Settings.settings
...\...\QueryDatabase.cs
...\Dbm.sln
...\Modify
...\......\bin
...\......\...\Debug
...\......\Class1.cs
...\......\Modify.csproj
...\......\obj
...\......\...\Debug
...\......\...\.....\TempPE
...\......\Properties
...\......\..........\AssemblyInfo.cs