每日构建例程中的数据库重建级别

I am in the process of designing a daily build routine for my project. We are using Flex 3 and SQL Server 2005. I am unsure to what degree I should be rebuilding the database on a daily build. Should I be dropping all tables and stored procedures and adding them back in? Then I would have to have a script that put all the default data back into the tables.I am in the process of designing a daily build