客户端 - 服务器数据库应用程序：如何通知客户端数据已更改？
是否可能知道数据库中某些表的内容何时以及是否已更改？
我的SQL Server如何通知客户端应用程序数据被另一个用户更改了？如何使用dbGo实现查询通知？
Is it possible to know when and if the contents of certain tables in a database has changed? How can my SQL Server notify the client applications that the data was changed by another user? How to implement query notifications with dbGo ?
我的客户端需要轮询数据库，还是有一个回调机制？
Do my clients need to poll the database, or is there a callback mechanism for this?
我的客户端是一个带有 TADODataSet 的Delphi应用程序，我的服务器是SQL Server 2005/2008，为多个客户端提供服务。
My client is a Delphi application with TADODataSet, and my server is SQL Server 2005/2008, serving multiple clients.
Delphi dbGo 控制项不支持 查询通知 ，因此要么轮询数据库，要么尝试检查eg以下某些：
The Delphi dbGo controls does not support Query Notifications, so either poll the database or try to check e.g. some of the following:
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服务器事件的WMI提供程序 - MSSQL服务代理 -
DA-SOFT AnyDAC TADEventAlerter组件 - 查询通知机制 -
Devart SDAC TMSChangeNotification组件 - 查询通知机制
WMI Provider for Server Events - MSSQL Service BrokerDA-SOFT AnyDAC TADEventAlerter component - Query Notifications mechanismDevart SDAC TMSChangeNotification component - Query Notifications mechanism