Commented Unassigned: Data - Date Modified Database Field [133]

I am trying to work on gathering metrics out of the software. I am unable to find the date modified field in the database. It displays on the screen under the history tab. I am only seeing last updated field and i want to be able to see the whole chain of events on the item. Can someone please point in the right direction to get to the date modified field please?

Overall I am trying to identify how many days the item was in one phase or status before begin moved or updated to the next.

Thanks a bunch!
Brittany
Comments: You can find all the history of an issue in the BugNet_IssueHistory table https://bugnet.codeplex.com/SourceControl/latest#src/BugNET.Database/Tables/BugNet_IssueHistory.sql