DB Concept needed for record editing and rollback ability

I love the way SO retains the edits to Q/A's and allows us to roll开发者_开发技巧 back if need be.

I'm looking for a DB structure concept on how to implement something similar to this. Can anyone give any insights?

My current solution is to have two tables like so...

Table1  
ID   |   Date   |   UserID

.

Table2
ID   |   Table1ID   |   UserID   |   Title   |   Details

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There are multiple ways to implement this. You can start by looking at the MediaWiki schema. See in particular the Revision, Page, and Pagecontent tables.

I believe StackOverflow's design is similar. However, according to this blog post, the StackOverflow devs ran into scalability issues with part of the design.