Mercurial > urweb
comparison tests/group_by.lac @ 227:524e10c91478
GROUP BY and HAVING
author | Adam Chlipala <adamc@hcoop.net> |
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date | Thu, 21 Aug 2008 14:09:08 -0400 |
parents | b0041cc7e5f7 |
children | 19e5791923d0 |
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226:b0041cc7e5f7 | 227:524e10c91478 |
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1 table t1 : {A : int, B : string, C : float} | 1 table t1 : {A : int, B : string, C : float} |
2 table t2 : {A : float, D : int} | 2 table t2 : {A : float, D : int} |
3 | 3 |
4 val q1 = (SELECT * FROM t1 GROUP BY t1.B) | 4 val q1 = (SELECT * FROM t1 GROUP BY t1.B) |
5 val q2 = (SELECT * FROM t1, t2 GROUP BY t1.B, t2.D, t1.A) | 5 val q2 = (SELECT * FROM t1, t2 GROUP BY t1.B, t2.D, t1.A) |
6 | |
7 val q3 = (SELECT * FROM t1 WHERE t1.A = 0 GROUP BY t1.B) | |
8 val q4 = (SELECT * FROM t1 WHERE t1.A = 0 GROUP BY t1.C HAVING t1.C < 0.2) | |
9 | |
10 val q5 = (SELECT t1.A, t2.D FROM t1, t2 GROUP BY t2.D, t1.A) | |
11 val q6 = (SELECT t1.A, t2.D FROM t1, t2 WHERE t1.C = 0.0 GROUP BY t2.D, t1.A HAVING t1.A = 0 AND t2.D = 17) |