Migrations let you change the database schema step by step to match your entity model, without dropping the database and losing its data. Each migration is a C# class whose Up method applies a change and whose Down method reverts it.
They matter for four reasons.
The schema history lives in source control next to the code.
Teammates share schema changes by pulling and applying each other's migrations.
The same migrations bring development, test and production databases to the same version.
You can roll back by updating to an earlier migration.
# Add migration
dotnet ef migrations add InitialCreate
# Update database
dotnet ef database update
# Remove last migration
dotnet ef migrations remove
Rewriting in plainer words…
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