On Tue, Nov 11, 2008 at 4:31 AM, King Simon-NFHD78
<[EMAIL PROTECTED]> wrote:
> Which is pretty much the query we wanted, apart from the names. I hope
> it works in your original example as well!
This worked great -- and I learned a bunch of useful sql and
sqlalchemy tricks along the way. Many
> -Original Message-
> From: sqlalchemy@googlegroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of John Hunter
> Sent: 11 November 2008 01:54
> To: sqlalchemy@googlegroups.com
> Subject: [sqlalchemy] Re: select where field=max(field)
>
>
> On Mon, Nov 10, 2008
On Mon, Nov 10, 2008 at 11:10 AM, Michael Bayer
<[EMAIL PROTECTED]> wrote:
> you need an extra tuple on the join, query.join((q1, s.s==q1.c.s))
This gets past the syntax error, but does not produce the right
results. I had to take some time off today to work on other problems,
but am now return
On Mon, Nov 10, 2008 at 10:05 AM, King Simon-NFHD78
<[EMAIL PROTECTED]> wrote:
> Actually, the section after that (Using Subqueries) probably does
> something very close to what you want. What's the result of these lines:
>
> q1 = (session.query(Snapshot.strategy, Snapshot.symbol, sum_pnl)
>
On Nov 10, 2008, at 12:08 PM, John Hunter wrote:
>
> On Mon, Nov 10, 2008 at 10:05 AM, King Simon-NFHD78
> <[EMAIL PROTECTED]> wrote:
>
>> Actually, the section after that (Using Subqueries) probably does
>> something very close to what you want. What's the result of these
>> lines:
>>
>> q1 =
> -Original Message-
> From: sqlalchemy@googlegroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of John Hunter
> Sent: 10 November 2008 15:29
> To: sqlalchemy@googlegroups.com
> Subject: [sqlalchemy] Re: select where field=max(field)
>
>
> On Mon, Nov 10,
On Mon, Nov 10, 2008 at 8:53 AM, King Simon-NFHD78
<[EMAIL PROTECTED]> wrote:
> It should be fairly easy to build that query with SA's underlying
> expression language. I'm not certain how to do it through session.query,
> but I'm sure it's possible.
The snippet you posted does do what I want wh
> -Original Message-
> From: sqlalchemy@googlegroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of John Hunter
> Sent: 10 November 2008 14:07
> To: sqlalchemy@googlegroups.com
> Subject: [sqlalchemy] Re: select where field=max(field)
>
>
> On Mon, Nov 10,
On Mon, Nov 10, 2008 at 4:33 AM, King Simon-NFHD78
<[EMAIL PROTECTED]> wrote:
> I'm no SQL expert, so please take this with a pinch of salt, but as far
> as I know, conditions in the 'WHERE' clause of an SQL statement are
> applied BEFORE any grouping, so you can't use grouping functions (such
>
> -Original Message-
> From: sqlalchemy@googlegroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of John Hunter
> Sent: 08 November 2008 05:09
> To: sqlalchemy@googlegroups.com
> Subject: [sqlalchemy] Re: select where field=max(field)
>
[SNIP]
> Here is a quer
On Fri, Nov 7, 2008 at 3:57 PM, Michael Bayer <[EMAIL PROTECTED]> wrote:
>
> Theres a good tutorial on the topic of GROUP BY from a SQL
> perspective, here:
>
> http://weblogs.sqlteam.com/jeffs/jeffs/archive/2007/07/20/60261.aspx
>
> in this case you probably want
> query.filter(Snapshot.totalqty=
If you are okay with only getting one record in the case of ties you can do
session.query(Snapshot).order_by(Snapshot.totalqty.desc()).first()
On Fri, Nov 7, 2008 at 12:22 PM, John Hunter <[EMAIL PROTECTED]> wrote:
>
> I am having trouble writing a sqlalchemy query which selects all rows
> where
Theres a good tutorial on the topic of GROUP BY from a SQL
perspective, here:
http://weblogs.sqlteam.com/jeffs/jeffs/archive/2007/07/20/60261.aspx
in this case you probably want
query.filter(Snapshot.totalqty==func.max(Snapshot.totalqty).select()).
On Nov 7, 2008, at 3:22 PM, John Hunter
13 matches
Mail list logo
