From: | Richard Broersma Jr <rabroersma(at)yahoo(dot)com> |
---|---|
To: | pgsql-docs(at)postgresql(dot)org |
Subject: | Valued Predicates |
Date: | 2006-11-16 05:55:21 |
Message-ID: | 740909.36746.qm@web31802.mail.mud.yahoo.com |
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Lists: | pgsql-docs |
In my reading of SQL for smarties I've stumbled across syntax that is supported by Postgresql.
However, I can't find mention of it in the Postgresql Docs. Would an appropriate location for
this syntax be the "where condition" of the insert/update/select/delete statements?
i.e.
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is unknown;
a | b
---+---
3 |
(1 row)
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is true;
a | b
---+--------
1 | Albert
2 | Bert
(2 rows)
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is false;
a | b
---+---
(0 rows)
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is not false;
a | b
---+--------
1 | Albert
2 | Bert
3 |
(3 rows)
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is not true;
a | b
---+---
3 |
(1 row)
mydb=# select * from test2 where ( (a,b) >= (1,'A') ) is not true;
a | b
---+---
3 |
(1 row)
Regards,
Richard Broersma Jr.
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