Mercurial > urweb
annotate 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 |
| rev | line source |
|---|---|
| adamc@235 | 1 table t1 : {A : int, B : string, C : float} |
| adamc@235 | 2 table t2 : {A : float, D : int} |
| adamc@235 | 3 |
| adamc@236 | 4 val q1 = (SELECT COUNT( * ) AS X FROM t1) |
| adamc@236 | 5 val q2 = (SELECT AVG(t1.A) AS X FROM t1) |
| adamc@236 | 6 val q3 = (SELECT SUM(t1.C) AS X FROM t1) |
| adamc@236 | 7 val q4 = (SELECT MIN(t1.B) AS X, MAX(t1.A) AS Y FROM t1) |
| adamc@237 | 8 |
| adamc@237 | 9 (*val q5 = (SELECT t1.A FROM t1 GROUP BY t1.B)*) |
| adamc@237 | 10 val q5 = (SELECT SUM(t1.A) AS X FROM t1 GROUP BY t1.B) |