Mercurial > urweb

table t1 : {A : int, B : string, C : float}
table t2 : {A : float, D : int}

val q1 = (SELECT COUNT( * ) AS X FROM t1)
val q2 = (SELECT AVG(t1.A) AS X FROM t1)
val q3 = (SELECT SUM(t1.C) AS X FROM t1)
val q4 = (SELECT MIN(t1.B) AS X, MAX(t1.A) AS Y FROM t1)

(*val q5 = (SELECT t1.A FROM t1 GROUP BY t1.B)*)
val q5 = (SELECT SUM(t1.A) AS X FROM t1 GROUP BY t1.B)


datatype list a = Nil | Cons of a * list a

val r1 : transaction (list string) =
        query q4
        (fn fs acc => return (Cons (fs.X, acc)))
        Nil

val main : unit -> transaction page = fn () =>
        n <- r1;
        return <html><body>Nothing to see here!</body></html>
author	Adam Chlipala <adamc@hcoop.net>
date	Fri, 17 Jul 2009 17:03:37 -0400
parents	7a7efbb3e354
children	ad9829c3c12c