there is no primary key and foreign key in LLAttrData table, only has two indexes:

index                 Columns indexed by                Unique

LLAttrData_DefID      DefID 

                             DefVerN

LLAttrData_ID         AttrID                               yes

                            ID

                            VerNum

Thank you for your replying. I am a newer in SQL Server. Could you please give me more details about it?

Thanks again!

Thank you very much! this is my first time to post a question and English is my second

language, so I can not describe my questions clearly. Sorry about that.

My co-worker...