Postgres 7.4:
a | b | sum
---+---+-----
1 | 2 | 2
| 2 | 4
1 | | 8
| | 16
DB2 8.2
A B 3
----------- ----------- -----------
1 2 2
- 2 4
1 - 8
- - 16
-Tom
> -----Original Message-----
> From: D. Richard Hipp [mailto:[EMAIL PROTECTED]
> Sent: Thursday, September 01, 2005 2:51 PM
> To: [email protected]
> Subject: [sqlite] Survey: NULLs and GROUP BY
>
> I'm rewriting the aggregate function processing in SQLite
> (so that it runs faster and uses less memory) and I want to
> make sure I get it right. In particular, I want to make
> sure that SQLite handles NULLs in GROUP BY values the same
> as other database engines.
>
> Can I get some volunteers to run the SQL shown below on various
> other SQL database engines and tell me what the output is?
>
> CREATE TABLE t1(a INTEGER, b INTEGER, c INTEGER);
> INSERT INTO t1 VALUES(1,2,1);
> INSERT INTO t1 VALUES(NULL,2,2);
> INSERT INTO t1 VALUES(1,NULL,4);
> INSERT INTO t1 VALUES(NULL,NULL,8);
> INSERT INTO t1 SELECT * FROM t1;
> SELECT a, b, sum(c) FROM t1 GROUP BY a, b ORDER BY 3;
>
> Thanks.
> --
> D. Richard Hipp <[EMAIL PROTECTED]>
>
>
