view tests/agg.ur @ 258:40c33706d887

Avoid unnecessary WHERE clause
author Adam Chlipala <adamc@hcoop.net>
date Sun, 31 Aug 2008 15:32:31 -0400
parents 71bafe66dbe1
children b66e692422a4
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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)