SQL Server Management Studio Plugin for Diagrams

Is there any plugin for SQL Server Management Studio which add more functions and ease of use in 开发者_如何转开发database diagrams.

Sadly, no. The current modelling tool is called "Davinci" and has remain essentially unchanged since it was introduced in SQL 7.0, circa 1997.

I suspect Microsoft is intentionally not releasing better modelling tools, perhaps as an anti-trust settlement or at least good-will. They could easily do a lot of damage to the modeling-tool software market by including a decent one with SQL Server for free. That is just my opinion, however.