【SQLAlchemy】SQLAlchemy修改查詢字段列名

SQLAlchemy問題記錄

company    price    quantity
Microsoft  100      10
Google     99       5
Google     99       20
Google     101      15

 

要實現腳本

select price, sum(quantity) as num from shares where company='Google' group by price;

SQLAlchemy寫法

你實際上需要label()方法。

result = dbsession.query(Shares.price, \
                            func.sum(Shares.quantity).label("Total sold")) \
                            .filter(Shares.company== 'Google') \
                            .group_by(Shares.price).all()