anything that looks like WORDS(<expr>, <expr>, <expr>, ...) that goes where SQL expressions go you can do with func. just use func.DISTINCT(col1, col2).
On Fri, Dec 14, 2018 at 10:47 PM Pavel Pristupa <[email protected]> wrote: > > I wonder if there's a way to build up the following SQL query for PostgreSQL > in SQLAlchemy using Session.query(): > > SELECT group_id, COUNT(DISTINCT(column1, column2)) FROM entities GROUP BY > group_id; > > I tried this one: > > Session.query(Entity.group_id, sa.func.count(sa.distinct(Entity.column1, > Entity.column2))).group_by(Entity.group_id) > > But sa.distinct doesn't support multiple columns. The Query's method > .distinct() supports multiple columns, but I have no idea how to use it for > this particular case. > > -- > 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. > --- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. -- 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. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
