它适用于本地。我将连接字符串更改为azure db并修复了一些引用以实现此目的。
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答案 0 :(得分：1)
尝试关闭连接池，在连接字符串中设置import sqlalchemy as sa
from sqlalchemy.ext.declarative import declarative_base
from decimal import Decimal
engine = sa.create_engine('sqlite:///:memory:')
Base = declarative_base()
session = sa.orm.sessionmaker(bind=engine)()
class OrderItem(Base):
__tablename__ = 'order'
id = sa.Column('id', sa.Integer, primary_key=True)
product_id = sa.Column('product_id', sa.Integer, sa.ForeignKey('product.id'))
user_id = sa.Column('user_id', sa.Integer, sa.ForeignKey('user.id'))
qty = sa.Column('qty', sa.Integer)
class Product(Base):
__tablename__ = 'product'
id = sa.Column('id', sa.Integer, primary_key=True)
price = sa.Column('price', sa.Numeric(14,2))
class User(Base):
__tablename__ = 'user'
id = sa.Column('id', sa.Integer, primary_key=True)
first_name = sa.Column('first_name', sa.Text)
last_name = sa.Column('last_name', sa.Text)
Base.metadata.create_all(engine)
engine.echo = True
session.add(User(id=42, first_name='John', last_name='Cleese'))
session.add(User(id=13, first_name='Sir', last_name='Robin'))
session.add(Product(id=1, price=Decimal('2.10')))
session.add(OrderItem(product_id=1, user_id=42, qty=9))
session.add(OrderItem(product_id=1, user_id=42, qty=2))
session.add(OrderItem(product_id=1, user_id=13, qty=2))
session.add(OrderItem(product_id=1, user_id=13, qty=3))
session.add(OrderItem(product_id=1, user_id=13, qty=20))
session.commit()
query = session.query(
(User.first_name + ' ' + User.last_name).label('seller'),
sa.func.count(OrderItem.id).label('unique_items'),
sa.func.sum(OrderItem.qty).label('items_total'),
sa.func.sum(OrderItem.qty * Product.price).label('order_amount'),
).join(OrderItem).join(Product).group_by(User.id).order_by('items_total',
'order_amount')
print('{0:=^40}\n{1:^40}\n{0:=^40}'.format('=', 'Query'))
results = [row for row in session.execute(query)]
print('{0:=^40}\n{1:^40}\n{0:=^40}'.format('=', 'Results'))
for row in results:
print(dict(row))
。
答案 1 :(得分：0)
如果没有看到您的实际连接字符串，我无法完全确定;但是，从堆栈跟踪错误的外观来看，它表明您的连接字符串正在使用：
providerName="System.Data.EntityClient"
尝试将连接字符串附加到：
providerName="System.Data.SqlClient"