I am experienced SSIS\T-SQL Developer who is looking for recommendations on reliable resources about SQL Server Internals\ "Under the hood" \ "Engine" stuff, for instance reading and understanding execution plans, date storage etc. Preferred media would be online courses \ series of video lectures, if not available then a book on the topic. I preference "from scratch" type of resource because i am pretty sure i have at the moment allot of misconception knowledge on the topic. Just to be clear my knowledge of T-SQL itself is high, as said above I am lacking knowledge on the internals part.