Pinal’s focus on and dedication to his work comes through in his content. Although his specialty is SQLServer and I am a born and bred Oracle specialist, I often find Pinal has general concepts that benefit anyone who is working with SQL based databases.
Right now Pinal is writing posts on Data Warehousing Interview Questions. The scope and brevity of his definitions are perfect for anyone wanting to condense their thinking about the broad range of data warehousing terminology.
Visit and subscribe to SQL Authority. It will be worth your while.