print(session.query(User).filter(and_(User.name.like("user%"), User.fullname.like("first%"))).all()) print(session.query(User).filter(or_(User.name.like("user%"), User.password != None)).all()) #sql过滤 print(session.query(User).filter("id>:id").params(id=1).all()) #关...
910ret_1=session.query(System_user.username).filter(System_user.nid.in_(list_user)).all()11print(ret_1) 112(1
sqlacodegen sqlite:///testdb.db --outfile=models.py -- tables users, addresses 1. 2. 为准备后面单表的 CRUD 操作,我用 sqlacodegen 命令创建 employees 表的 model 映射代码: sqlacodegen sqlite:///testdb.db --outfile=employee_model.py --tables employees 1. 生成的代码文件 employee_model.py...
get_tables_for_bind(bind=None) Returns a list of all tables relevant for a bind. init_app(app) This callback can be used to initialize an application for the use with this database setup. Never use a database in the context of an application not initialized that way or connections will...
from sqlalchemy import MetaData metadata_obj = MetaData() # engine level: # create tables metadata_obj.create_all(engine) # reflect all tables metadata_obj.reflect(engine) # reflect individual table t = Table("t", metadata_obj, autoload_with=engine) # connection level: with engine.connect(...
fromsqlalchemyimportor_ query.filter(or_(User.name =='ed', User.name =='wendy'))# matchquery.filter(User.name.match('wendy')) 返回list或者scalar all() 列表first() scalarone()one_or_none()scalar() 参考 sqlalchemy官网
(返回一个字典,键为表名,值为字段信息)tables=Base.metadata.tables# 获取所有表格,字典为键为表名,值为字段属性组成的tables=list(tables.keys())data=pd.read_sql(sql,engine)sql=f"""select setval('{table}_id_seq', (select max(id) from{table}));"""dayAQData_o3=[gridHourAQDataGroupById['...
tables['stock_basics'] result2 = list(engine.execute(table.select(table.c.pe < 2))) # pe为stock_basics的一个列名 #%% ORM 方法 表中要有主键 engine.echo = True # We want to see the SQL we're creating metadata = MetaData(engine) # The stock_basics table already exists, so no ...
修复了一个 bug,即从 over()子句中收集的“from”子句将是一个 itertools.chain()而不是一个列表,导致与其他子句组合时出现“can only concatenate list” TypeError。 [SQL]修复了在 over()子句中不正确使用“,”被放置在“partition”和“order by”子句之间的问题。参考:#2134 [SQL]在PrimaryKeyConstraint ...
SQLAlchemy Python库的不官方的教程说明书