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()

【SQLAlchemy】SQLAlchemy修改查詢字段列名