SQL Sourcesafe Equivalent?

Recently, my company's deveolpment machine crashed. We had to format the harddrive which meant we lost some of our databases.

We managed to restore the databases, but we do not know in what state, i.e. which stored procedures were written between the restore point and the point the machine crashed.

Tow questions related to this:

1. I was wondering if there is any product that is similar to soursesafe but appied to databases, so that this problem will not happen again. Does Enterprise manager do something like this?

2. I was also wondering if there was anyway to undo an sql command. e.g. my colleague recently ran a command to update a database, but forgot to write the where clause!! That data was recovered aswell, but it would be nice to have some sort of undo button.

Thanks in advance.

Jagdip