Re: [sqlalchemy] Creating a dynamic/new column using Text selects?
On Thursday, March 22, 2018 at 4:27:18 PM UTC-4, Mike Bayer wrote:
>
>
> probably just make a fake column:column('counted') see what that
> does
>
>
Bingo. Thanks!
counted_column = sqlalchemy.Column('counted')
stmt = sqlalchemy.text('''SELECT...''')
stmt = stmt.columns(Foo.id, Foo.name, counted_column)
results = session.query(Foo, counted_column).from_statement(stmt).all()
--
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The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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Re: [sqlalchemy] Creating a dynamic/new column using Text selects?
On Thu, Mar 22, 2018 at 4:16 PM, Jonathan Vanasco wrote:
> I have a large and complex analytics query that I'd like to keep in raw SQL.
> It generally looks like this:
>
> SELECT foo.id,
>foo.name,
>tally.counted
> FROM(...
> ...) tally
> JOIN foo ON tally.foo_id = foo.id
> WHERE tally.counted > 1
> ORDER BY tally.counted DESC
>
> Is it possible to use the `columns` approach from the textual sql docs to
> pull in the `counted` value ? Something like this:
>
> stmt = sqlalchemy.text('''SELECT...''')
> stmt = stmt.columns(Foo.id, Foo.name, ???)
> results = session.query(Foo, ???).from_statement(stmt).all()
>
probably just make a fake column:column('counted') see what that does
>
>
>
> --
> SQLAlchemy -
> The Python SQL Toolkit and Object Relational Mapper
>
> http://www.sqlalchemy.org/
>
> To post example code, please provide an MCVE: Minimal, Complete, and
> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
> description.
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--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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[sqlalchemy] Creating a dynamic/new column using Text selects?
I have a large and complex analytics query that I'd like to keep in raw
SQL. It generally looks like this:
SELECT foo.id,
foo.name,
tally.counted
FROM(...
...) tally
JOIN foo ON tally.foo_id = foo.id
WHERE tally.counted > 1
ORDER BY tally.counted DESC
Is it possible to use the `columns` approach from the textual sql docs to
pull in the `counted` value ? Something like this:
stmt = sqlalchemy.text('''SELECT...''')
stmt = stmt.columns(Foo.id, Foo.name, ???)
results = session.query(Foo, ???).from_statement(stmt).all()
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
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