Ars Technica

SQL: aggregate results for first/last attempts

SQL is, sadly, kicking my ass today. quiz: id descr ===== 1 FooQuiz question: id quizid descr response ===== 1 1 Foo [A,B] 2 1 Foo [A,B] quiz_attempt: id quizid userid ===== 1 1 1 2 1 2 ...
Ars Technica

SQL, Aggregate Functions, and Group By

Hi!<BR><BR>I often run queries on my company’s Data Warehouse, which runs DB2. Due to the nature of my permissions, I cannot create Views or new Tables – thus, everything generally has to be done in a ...