2014年12月17日
Primary Key and Unique Key difference in SQL Server
摘要： posted from http://www.sqlservergeeks.com/primary-key-and-unique-key-difference-in-sql-server/Primary and Unique Key both enforce uniqueness of column... 阅读全文
posted @ 2014-12-17 15:17 Hopecho 阅读(302) 评论(0) 推荐(0)