不，你，不需要在所有客户端的计算机上安装MS SQL服务器。您只需要一台安装了MS SQL Server的计算机，并且您需要配置该SQL Server以在LAN中使用它。

请参阅：服务器网络配置 [ ^ ]

No, you, don''t need to install MS SQL server on all client''s computers. You need only one computer on which MS SQL Server is installed and you need to configure that SQL Server to use it in LAN.
Please, see this: Server Network Configuration[^]