![]() ![]() SET = INSERT INTO Actors (Name, Age, Gender) VALUES ( ' Leonardo DiCaprio', 48, 0) SET = INSERT INTO ActorsMovies (ActorId, MovieId) VALUES ( INTO Movies (Title, Rating) VALUES ( ' Inceptiopn', 1) SET = INSERT INTO ActorsMovies (ActorId, MovieId) VALUES ( INTO Actors (Name, Age, Gender) VALUES ( ' Mike Myers', 59, 0) SET = INSERT INTO Actors (Name, Age, Gender) VALUES ( ' Cameron Diaz', 50, 1) If you want to tag along in this article, here is the SQL you can execute to create the above database:ĪDD CONSTRAINT FK_ActorId_Actors_Id FOREIGN KEY (ActorId)ĪDD CONSTRAINT FK_MovieId_Movies_Id FOREIGN KEY (MovieId)ĭECLARE int DECLARE int INSERT INTO Movies (Title, Rating) VALUES ( ' Shrek', 5) In this case, I don’t have a console application, but I have a database. In most articles, I have a simple console application with some code to start from. If that is done correctly, you can continue adding and changing the entities in C# and use migrations to update the database. ![]() This way, you create the C# classes that represent the entities. In that case, you want Entity Framework to read the existing database and generate the entities. Migrating the data can be a hustle and you can run into errors because there might be a configuration you didn’t see, like an index or a trigger. The reason is simple: Deleting a database will also delete the data. It is not a good idea to delete the database and build it back up with the code-first approach. In some cases, you don’t have the luxury of code first and you are stuck with an existing database. Most of the settings, like fields of a table, can be set through code and you can keep it simple. The advantage of code first is that you can control the whole flow and design of the database with C#. ![]() Entity Framework will create the database, if it doesn’t exist yet, and updates the database with changes in the entities. You can create new entities and ‘push’ them to the database. If you use the code-first approach, you don’t have a database and you create one with migrations. ![]()
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