问题
I'd like to calculate a MAX() value for a column. What's the proper way to do this in sqlalchemy while preserving database independence?
回答1:
You can find aggregate functions in:
from sqlalchemy import func
func.avg(...)
func.sum(...)
func.max(...)
In 0.5 you can use an ORM query like a select:
session.query(func.max(Table.column))
来源：https://stackoverflow.com/questions/2358634/database-independent-max-function-in-sqlalchemy