Is TimeStamp column unique?

Question

Is TimeStamp unique in all rows?

Does it have a unique index on it?

Answer 1

The docs says

unique binary numbers within a database

But in practice you can run into situations where this statement is not true. Since the value is generated from a database global counter you might run into problems when restoring databases and or using timestamp in tables in tempdb.

You can see the next value:

Select @@DBTS

Until SQL Server 2000 there was an undocumented command to change the value

DBCC CHECKDBTS (dbId, newTimestamp)

To change the timestamp in non ancient verswions of SQL server see this answer:

https://dba.stackexchange.com/a/11088/149485