Description: C# query data column calculation function, in fact, usually encountered many similar features, but we do not know what function test before additional database, unattached running EXE will be prompted to database error, and see the effect, such as the screenshot shows.
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File list (Check if you may need any files):
JoinAccount\DataBase\db_10_Data.MDF
...........\........\db_10_Log.LDF
...........\JoinAccount\bin\Debug\JoinAccount.exe
...........\...........\...\.....\JoinAccount.pdb
...........\...........\...\.....\JoinAccount.vshost.exe
...........\...........\Form1.cs
...........\...........\Form1.Designer.cs
...........\...........\Form1.resx
...........\...........\JoinAccount.csproj
...........\...........\obj\Debug\JoinAccount.csproj.FileListAbsolute.txt
...........\...........\...\.....\JoinAccount.csproj.GenerateResource.Cache
...........\...........\...\.....\JoinAccount.exe
...........\...........\...\.....\JoinAccount.Form1.resources
...........\...........\...\.....\JoinAccount.pdb
...........\...........\...\.....\JoinAccount.Properties.Resources.resources
...........\...........\Program.cs
...........\...........\...perties\AssemblyInfo.cs
...........\...........\..........\Resources.Designer.cs
...........\...........\..........\Resources.resx
...........\...........\..........\Settings.Designer.cs
...........\...........\..........\Settings.settings
...........\JoinAccount.sln
...........\JoinAccount.suo
...........\...........\obj\Debug\TempPE
...........\...........\bin\Debug
...........\...........\obj\Debug
...........\...........\bin
...........\...........\obj
...........\...........\Properties
...........\DataBase
...........\JoinAccount
JoinAccount
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