In depth study of efcore migrations

1、 Use the migration script , You can perform a higher number migration on the currently connected database , This operation is called “ Move up (Up)”, You can also perform a migration that backs the database back to the old , This operation is called " Downward migration (Down)"

2、 Unless there's a special need , Otherwise, do not delete Migratons The code under the file

3、 Further analysis Migrations Under the code . analysis Up、Down Other methods . see Migration Number

4、 View the dbo._EFMigrationsHistory surface ： Record the migration script that has been applied to the current database , In order

Migrations Other commands
1、Update-Database XXX
Rollback or upgrade the database to XXX The state of , The migration script does not move

2、Remove-migration
Delete the last migration script

3、Script-Migration
Generate migration SQL Code .
With Update-Database Why generate SQL Script
Version can be generated D To version F Of SQL Script ：
Script-Migration D F
Generate version D To the latest version of SQL Script ：Script-Migration D