sqlAlchemy的ORM经典教程

资料来源：http://www.jianshu.com/p/8d085e2f2657

等于查询：

query.filter(User.name == 'ed')

不等于查询：

query.filter(User.name != 'ed')

like查询：

query.filter(User.name.like('%ed%'))

in查询：

query.filter(User.name.in_(['ed', 'wendy', 'jack']))

not in 查询

query.filter(~User.name.in_(['ed', 'wendy', 'jack']))

is null查询：

query.filter(User.name == None)

is not null查询

query.filter(User.name != None)

and查询：

from sqlalchemy import and_query.filter(and_(User.name == 'ed', User.fullname == 'Ed Jones'))# or send multiple expressions to .filter()query.filter(User.name == 'ed', User.fullname == 'Ed Jones')

or查询：

from sqlalchemy import or_query.filter(or_(User.name == 'ed', User.name == 'wendy'))

match查询

query.filter(User.name.match('wendy'))

order_by语句：

query = session.query(User).filter(User.name.like('%ed')).order_by(User.id)

count计数

session.query(User).filter(User.name.like('%ed')).count()

分页查询

session.query(Channel).filter(and_(                filter_list            )).order_by(desc(Channel.updateTime)).slice(offset, limit)