sqlalchemy: get max/min/avg values from a table

Question

I have this query:

mps =   (
            session.query(mps)  .filter_by(idc = int(c.idc))
                                .filter_by(idmp = int(m.idmp))
             


        

Answer 1

The following functions are available with from sqlalchemy import func:

• func.min
• func.max
• func.avg

Documentation is available here.

You can use them i.e. in the query() method.

Example:

session.query(self.stats.c.ID, func.max(self.stats.c.STA_DATE))

(just like you use agragate functions in plain SQL)

Answer 2

Or just use an order_by() and select the first or last element. . .