What does database Setinitializer do?
What is the Need of Database Initializer? The job of database initializer is to create the database and the specified tables. When a DbContext type is used to access database for the first time, then the database initializer is called.
What is database initialization?
Database initialization is an important part of application deployment. Typically a DBA applies a set of SQL scripts to initialize a database or perform an upgrade. Applications with automated installation procedure. The database can be initialized during a setup process or on application startup.
What is a DbContext class?
A DbContext instance represents a combination of the Unit Of Work and Repository patterns such that it can be used to query from a database and group together changes that will then be written back to the store as a unit. DbContext is conceptually similar to ObjectContext.
What is the use of database initializer in code first model?
This is the default initializer class used by the Code-First approach, When the application starts, this initializer checks for the required model database. If it is not found it will create the database. Suppose we have created a new project and added a model with different property.
How do you create a database migration?
2 Answers
- Delete your database from within SQL Server Object Explorer.
- In Package-Management-Console type “Add-Migration InitialCreate” [optional, depending on your database initializer]
- In Package-Management-Console type “update-database”
What is DDL in SQL?
In the context of SQL, data definition or data description language (DDL) is a syntax for creating and modifying database objects such as tables, indices, and users. DDL statements are similar to a computer programming language for defining data structures, especially database schemas.
What is DbSet and DbContext?
A DbContext corresponds to your database (or a collection of tables and views in your database) whereas a DbSet corresponds to a table or view in your database. So it makes perfect sense that you will get a combination of both!
What is the use of DbContext?
The DbContext class is an integral part of Entity Framework. An instance of DbContext represents a session with the database which can be used to query and save instances of your entities to a database. DbContext is a combination of the Unit Of Work and Repository patterns.
What is the purpose of DropCreateDatabaseAlways database initializer in Entity Framework?
DropCreateDatabaseAlways: As the name suggests, this initializer drops an existing database every time you run the application, irrespective of whether your model classes have changed or not.
What is IEntityTypeConfiguration?
IEntityTypeConfiguration Interface Allows configuration for an entity type to be factored into a separate class, rather than in-line in OnModelCreating(ModelBuilder).
