believe it or not, the questions were not easy. i understand the concepts but when you put "here are two queries, will A execute the same as B, will it be different than B, will A execute while B will have an error, will B execute while A will have an error, or will neither of them execute" it's a bit difficult when you get past the easy shit because I CAN'T PARSE COMPLEX QUERIES IN MY HEAD much less figure out if one will be less than another without actually running it.