----- Original Message ----- From: "Tobias K. Tobiasen" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, April 04, 2002 6:46 PM Subject: Group by?
> Hello > > I think the gruop by is behaving strange. Could someone please explain > this or maybe point me to a definition of the group by. (Inspired by > http://www.mysql.org/doc/E/x/Examples.html). > > > CREATE TABLE shop ( > article INT(4) UNSIGNED ZEROFILL DEFAULT '0000' NOT NULL, > dealer CHAR(20) DEFAULT '' NOT NULL, > price DOUBLE(16,2) DEFAULT '0.00' NOT NULL, > PRIMARY KEY(article, dealer)); > > INSERT INTO shop VALUES > (1,'A',3.45),(1,'B',3.99),(2,'A',10.99),(3,'B',1.45),(3,'C',1.69), > (3,'D',1.25),(4,'D',19.95); > > mysql> SELECT * FROM shop; > > +---------+--------+-------+ > | article | dealer | price | > +---------+--------+-------+ > | 0001 | A | 3.45 | > | 0001 | B | 3.99 | > | 0002 | A | 10.99 | > | 0003 | B | 1.45 | > | 0003 | C | 1.69 | > | 0003 | D | 1.25 | > | 0004 | D | 19.95 | > +---------+--------+-------+ > 7 rows in set (0.00 sec) > > mysql> select * from shop GROUP BY article; > +---------+--------+-------+ > | article | dealer | price | > +---------+--------+-------+ > | 0001 | A | 3.45 | > | 0002 | A | 10.99 | > | 0003 | B | 1.45 | > | 0004 | D | 19.95 | > +---------+--------+-------+ > 4 rows in set (0.00 sec) > > QUESTION: I had expected 7 rows - where did the rest go? Try SELECT * FROM shop GROUP BY article,dealer; (same thing for the rest of queries) Regards, Jocelyn Fournier Presence-PC --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
