query方法返回的是乙個可迭代輸出的物件，可以索引和切片。引數可以為表物件，表的字段物件。
>>> for instance in session.query(user).order_by(user.id):
... print instance.name, instance.fullname
>>> for name, fullname in session.query(user.name, user.fullname):
... print name, fullname
>>> from sqlalchemy.orm import aliased
>>> user_alias = aliased(user, name='user_alias')
sql>>> for row in session.query(user_alias, user_alias.name).all():
... print row.user_alias
方法相當於orderby子句；
query.filter(user.name==『ed』)
query.filter(user.name!=『ed』)
like
query.filter(user.name.like(『%ed%』))
in
query.filter(user.name.in_([『ed』, 『wendy』, 『jack』]))
從句
query.filter(user.name.in_(
session.query(user.name).filter(user.name.like(『%ed%』))
))not in
query.filter(~user.name.in_([『ed』, 『wendy』, 『jack』]))
is null
query.filter(user.name == none)
and
from sqlalchemy import and_
query.filter(and_(user.name == 『ed』, user.fullname == 『ed jones』))
query.filter(user.name == 『ed』, user.fullname == 『ed jones』)
or
query.filter(user.name == 『ed』).filter(user.fullname == 『ed jones』)
from sqlalchemy import or_
query.filter(or_(user.name == 『ed』, user.name == 『wendy』))
match
query.filter(user.name.match(『wendy』))
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