Mercurial > urweb
annotate tests/agg.ur @ 1187:ad9829c3c12c
COUNT(col)
| author | Adam Chlipala <adamc@hcoop.net> |
|---|---|
| date | Tue, 16 Mar 2010 15:54:35 -0400 |
| parents | 7a7efbb3e354 |
| children | 601a77af0477 |
| rev | line source |
|---|---|
| adamc@235 | 1 table t1 : {A : int, B : string, C : float} |
| adamc@1187 | 2 table t2 : {A : float, D : int, E : option string} |
| 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@1187 | 8 val q5 = (SELECT SUM(t1.A) AS X FROM t1 GROUP BY t1.B) |
| adamc@1187 | 9 val q6 = (SELECT COUNT(t2.E) AS N FROM t2 GROUP BY t2.D) |
| adamc@237 | 10 |
| adamc@1187 | 11 fun main () : transaction page = |
| adamc@1187 | 12 xml <- queryX q6 (fn r => <xml>{[r.N]};</xml>); |
| adamc@1187 | 13 return <xml><body>{xml}</body></xml> |