如果你的实例叫做SQLEXPRESS，那么你需要使用.\SQLEXPRESS或(local)\SQLEXPRESS 或 yourMachineName\SQLEXPRESS 作为您的服务器名称 - 如果您有一个 命名实例，则需要在您的服务器名称.

If your instance is called SQLEXPRESS, then you need to use .\SQLEXPRESS or (local)\SQLEXPRESS or yourMachineName\SQLEXPRESS as your server name - if you have a named instance, you need to specify that name of the instance in your server name.