Hi Dennis,
You're right. Putting """ allows indentation. Great!
About putting the name of the table: x.travelerID, etc.. I think it keep the
query more documented, specially when you are dealing with 5 tables in a
same query, like this query.
Cheers.. Threader.
---------- Forwarded message ----------
From: Dennis Lee Bieber <wlfr...@ix.netcom.com>
To: python-list@python.org
Date: Tue, 22 Sep 2009 10:43:52 -0700
Subject: Re: Solved - Python: automate input to MySQL query
On Tue, 22 Sep 2009 15:58:18 +1000, Threader Slash
<threadersl...@gmail.com> declaimed the following in
gmane.comp.python.general:
>
> self.db = MySQLdb.connect(hostname,username,passwd,dbname)
> self.cursor=self.db.cursor();
>
> name="John"
> runQuery="SELECT traveler.travelerFirstName,vaccine.vaccineName from
> traveler INNER JOIN takenvaccine ON traveler.travelerID =
> takenvaccine.travelerID INNER JOIN vaccine ON
> takenvaccine.vaccineID=vaccine.vaccineID INNER JOIN requiredvaccine ON
> vaccine.vaccineID=requiredvaccine.requiredvaccineID INNER JOIN site ON
> requiredvaccine.siteID = site.siteID WHERE traveler.travelerFirstName
> = %s"
>
<snip>
>
> Note: you need to declare the whole query in the same line to it take
effect
> in the variable "runQuery".
No, you don't... IF you wrap it in triple-quotes...
runQuery="""select t.travelerFirstName, v.vaccineName
from traveler as t
inner join takenvaccine as tv
on t.travelerID = tv.travelerID
inner join vaccine as v
on tv.vaccineID = v.vaccineID
inner join requiredvaccine as rv
on v.vaccineID = rv.requiredvaccineID
inner join site as s
on rv.siteID = s.siteID
where t.travelerFirstName = %s"""
Should be perfectly acceptable to Python and the database query
processor.
I'm not too impressed with the database naming scheme -- if the
TABLE is named "x", why prefix all the fields in the table with the same
"x"
requiredvaccine.requiredvaccineID
is rather redundant -- same with all the others. The only place where it
might be justified is when it is a foreign key linkage.
vaccine.ID ID of the vaccine record
requiredvaccine.ID ID of the rv record itself, not of
the
vaccine
requiredvaccine.vaccineID foreign key, ID /in/ vaccine
that
this record refers to.
--
http://mail.python.org/mailman/listinfo/python-list
