关于select语句的SQLAlchemy教程
我正试图从下面的网站上学习sqlalchemy教程关于select语句的SQLAlchemy教程,sqlalchemy,Sqlalchemy,我正试图从下面的网站上学习sqlalchemy教程 http://www.rmunn.com/sqlalchemy-tutorial/tutorial.html 在做select语句时，我真的被卡住了 根据教程，选择如下所示，但我不理解他在users.select中使用users.c.name=='John'的部分。语句中的users.c是什么 users.name就足够了吗 from sqlalchemy import * # Let's re-use the same database
http://www.rmunn.com/sqlalchemy-tutorial/tutorial.html
from sqlalchemy import *
# Let's re-use the same database as before
db = create_engine('sqlite:///tutorial.db')
db.echo = True # We want to see the SQL we're creating
metadata = BoundMetaData(db)
# The users table already exists, so no need to redefine it. Just
# load it from the database using the "autoload" feature.
users = Table('users', metadata, autoload=True)
def run(stmt):
rs = stmt.execute()
for row in rs:
print row
# Most WHERE clauses can be constructed via normal comparisons
s = users.select(users.c.name == 'John')
run(s)
s = users.select(users.c.age < 40)
run(s)