Well, your syntax is *exactly* what I had (with a few cosmetic changes). I've been over the MySQL manual on joins with no luck. I'll read over your resources tonight. Any other ideas would be appreciated. Thanks, V
On Thu, Oct 1, 2009 at 4:49 PM, Gavin Towey <gto...@ffn.com> wrote: > Victor, > > > > Thank you for the information, that was helpful. > > > > At least part of the problem is the variables you are replacing in that > string, which we can’t see. > > > > The statement should be something like: > > > > select * from ben_franklin_planners c join products p on c.Item=p.Item join > categories cat on p.Category=cat.ID > > > > Make your code produce the above, and you should be fine. I suspect you > don’t need LEFT JOIN there, an inner join will suffice. > > > > For more info on joins: > > http://hashmysql.org/index.php?title=Introduction_to_Joins > > For more indepth info: > http://dev.mysql.com/tech-resources/articles/mysql-db-design-ch5.pdf > > http://dev.mysql.com/doc/refman/5.1/en/join.html > > > > Regards, > > Gavin Towey > > > > *From:* Victor Subervi [mailto:victorsube...@gmail.com] > *Sent:* Thursday, October 01, 2009 2:25 PM > *To:* Gavin Towey; mysql@lists.mysql.com > *Subject:* Re: Nested Joins > > > > On Thu, Oct 1, 2009 at 4:03 PM, Gavin Towey <gto...@ffn.com> wrote: > > Joins aren't nested like that, unless you use a subquery. I think you just > need to remove the parens around the second join. > > > I tried that and no go :( > > > For better help: > 1. show the real SQL -- echo the statement. Most people here don't like > looking at app code because your variables could contain anything. > > ProgrammingError: (1064, "You have an error in your SQL syntax; check the > manual that corresponds to your MySQL server version for the right syntax to > use near ') left join categories on products.Category=categories.ID)' at > line 1"), referer: http://13gems.com/global_solutions/spreadsheet_edit.py > > > 2. Give the exact error message > > Isn't that the same thing? > > > 3. If there's no error, explain what you expect and what you're getting > > 4. Include table schema > > DESCRIBE `ben_franklin_planners` > ID int(4) unsigned NULL > Item int(4) unsigned NULL > Discount int(2) unsigned NULL > > DESCRIBE categories > ID int(3) primary key not NULL auto_increment > Category varchar(20) unique NULL > > describe products > ID int(4) primary key not NULL > Category int(3) NULL > Item varchar(20) UNIQUE NULL > Description varchar(255) NULL > UOM varchar(20) NULL > Price float(7,2) NULL > > > > 5. Explain what you're trying to accomplish. > > cursor.execute('select * from %s left join products on > %s.Item=products.Item left join categories on > products.Category=categories.ID;' % (client, client)) > > The "client" in this case is ben_franklin_planners > ben_franklin_planners has an item # that is the same as the item # in > products, where all the information about the products is to be found, > EXCEPT the name of the category. For that, we have to go to the categories > table. > > Hope that makes it clear. > TIA, > V > > > > ------------------------------ > The information contained in this transmission may contain privileged and > confidential information. It is intended only for the use of the person(s) > named above. If you are not the intended recipient, you are hereby notified > that any review, dissemination, distribution or duplication of this > communication is strictly prohibited. If you are not the intended recipient, > please contact the sender by reply email and destroy all copies of the > original message. >
