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dotnet tool install --global dotnet-ef
dotnet tool update --global dotnet-ef
dotnet new web -f netcoreapp3.1
dotnet add package Microsoft.EntityFrameworkCore --version 3.1.8
dotnet add package Microsoft.EntityFrameworkCore.Tools --version 3.1.8
dotnet add package Oracle.EntityFrameworkCore --version 3.19.80
dotnet ef DbContext scaffold "Data Source=myserver:1521/mydatabase; User ID=me;Password=mypassword;" Oracle.EntityFrameworkCore -t ATABLE