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table t1 : {A : int, B : string, C : float}
table t2 : {A : float, D : int}
val q1 = (SELECT * FROM t1 ORDER BY t1.A, t1.B)
val q2 = (SELECT * FROM t1 GROUP BY t1.A ORDER BY t1.A, t1.B)
val q3 = (SELECT t1.B FROM t1
UNION SELECT t1.B FROM t1
ORDER BY t1.B)
val q4 = (SELECT t1.A, t2.D, t1.A < t2.D AS Lt
FROM t1, t2
ORDER BY Lt)
val q5 = (SELECT t1.A, t1.B, t2.D, t1.A < t2.D AS Lt
FROM t1, t2
ORDER BY t1.A DESC, Lt ASC, t2.D DESC)
datatype list a = Nil | Cons of a * list a
val r1 : transaction (list string) =
query q5
(fn fs acc => return (Cons (fs.T1.B, acc)))
Nil
val r2 : transaction string =
ls <- r1;
return (case ls of
Nil => "Problem"
| Cons (b, _) => b)
val main : unit -> transaction page = fn () =>
s <- r2;
return <html><body>
{cdata s}
</body></html>
|
