EF6 Code First Mode Update database schema

Defining entity classes and Context classes

Enter the following command in the package Manager Console

1, Enable-migrations

Enables the data migration feature, which typically generates a migrations folder under the project root directory, which typically has two files in the folder

201408020650593_initialcreate.cs-the data structure before migration, the first half is timestamp

Configuration.cs--related configuration, whether automatic migration is required, etc., default to False

2, Add-migration

Increase the migration point, you will be asked to enter the migration point name after entering this command, which generates the following files in the Migrations folder

201408020650593_[name].cs--[name] is the name of the migration point you entered

3, Update-database-targetmigration: "201408041342375_003"

Upgrade/rollback to Migration point "201408041342375_003"

4, Update-database

Databases are upgraded to the latest schema based on entity and context definitions

5, Update-database-script

Show updated SQL statement definitions, show only, do not perform updates