table t1 : {A : int, B : string, C : float} table t2 : {A : float, D : int} val q1 = (SELECT * FROM t1 UNION SELECT * FROM t1) val q2 = (SELECT t1.A, t1.B FROM t1 WHERE t1.A = 0 INTERSECT SELECT t1.B, t1.A FROM t1 WHERE t1.B = t1.B) val q3 = (SELECT t1.A, t1.B, t1.C FROM t1 WHERE t1.A = 0 INTERSECT SELECT * FROM t1 WHERE t1.B = 'Hello world!' EXCEPT SELECT * FROM t1 WHERE t1.A < t1.A UNION SELECT * FROM t1 WHERE t1.A > t1.A) datatype list a = Nil | Cons of a * list a val r1 : transaction (list {A : int, B : string, C : float}) = query q3 (fn fs acc => return (Cons (fs.T1, acc))) Nil val r2 : transaction string = ls <- r1; return (case ls of Nil => "Problem" | Cons ({B = b, ...}, _) => b) val main : unit -> transaction page = fn () => s <- r2; return {cdata s}