使用SCOPE_IDENTITY()代替@@IDENTITY的原因

Many TSQL books show you how to use @@Identity to get the identity of the most recently added row.  Many articles online, or in magazines show the same.  What you might not know is that it is potentially a source for some very hard to trace bugs in your application.

@@Identity is potentially a very, very bad thing!  In almost every case, you should use scope_identity() instead.

Why?  @@Identity returns the most recently created identity for your current connection.  When you first use it, it might be fine.  Until someone adds a trigger.  If the trigger causes another identity to be created, guess which identity you'll get in your call to @@Identity?  Not nice.

scope_identity() is much nicer.  It gives you what you're expecting.

原文连接

http://weblogs.sqlteam.com/travisl/archive/2003/10/29/405.aspx