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No there is No need to "lose" any data when using automatic migrations. You migration config class should state no data loss allowed You will need to build custom scripts/ or tweak the generated scripts when dealing with changes that result in data loss. <pre><code>public override void MigrateDb() { Database.SetInitializer(new MigrateDatabaseToLatestVersion<MYDbContext, MYSECIALMigrationConfiguration>()); // Context = GetDefaultContext(); // check if a new context is really needed here Context.Database.Initialize(true); } public class MYSPECIALMigrationConfiguration : MYBaseMigrationConfiguration<MYDbContext>{ } public abstract class MYBaseMigrationConfiguration<TContext> : DbMigrationsConfiguration<TContext> where TContext : DbContext{ protected MYBaseMigrationConfiguration() { AutomaticMigrationsEnabled = true; // you can still chnage this later if you do so before triggering Update AutomaticMigrationDataLossAllowed = true; // you can still chnage this later if you do so before triggering Update } </code></pre> <blockquote> how to approach migrations. </blockquote> .. Thats actual a big question. <a href="http://msdn.microsoft.com/en-us/data/dn481501" rel="nofollow">EF6 Migrations - new features and options</a> <a href="http://msdn.microsoft.com/en-us/data/dn481501" rel="nofollow">Great info on Migrations when working in teams.</a> This covers many scenarios you may recognise and thus help you understand what approach suits you best.
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A row detail

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