EF code first 更新数据库时，已更新完成，但是数据库没有更新

[爱学习的火龙果]

PM> Enable-Migrations -Force -ContextTypeName "DataBaseContext" -ProjectName "DataBase" -StartUpProjectName "WDFramework" -ConnectionStringName "WDFramework" -Verbose
Using StartUp project 'WDFramework'.
Checking if the context targets an existing database...
Code First Migrations enabled for project DataBase.
PM> add-migration 988 -ProjectName "DataBase" -StartUpProjectName "WDFramework" -ConnectionStringName "WDFramework" -Verbose
Using StartUp project 'WDFramework'.
Scaffolding migration '988'.
The Designer Code for this migration file includes a snapshot of your current Code First model. This snapshot is used to calculate the changes to your model when you scaffold the next migration. If you make additional changes to your model that you want to include in this migration, then you can re-scaffold it by running 'Add-Migration 988' again.
Target database is: 'KYGLDB1' (DataSource: 192.168.99.148, Provider: System.Data.SqlClient, Origin: Explicit).
PM> Update-Database -Script -ProjectName "DataBase" -StartUpProjectName "WDFramework" -ConnectionStringName "WDFramework" -Verbose
Using StartUp project 'WDFramework'.
Target database is: 'KYGLDB1' (DataSource: 192.168.99.148, Provider: System.Data.SqlClient, Origin: Explicit).
Applying explicit migrations: [201407220753266_988].
Applying explicit migration: 201407220753266_988.
PM>