engine = create_engine("mysql+mysqldb://root:123456@127.0.0.1/todo?charset=utf8") Base = declarative_base() classHuman(Base): __tablename__ ="human" id= Column("id", Integer, autoincrement=True, primary_key=True) name = Column("name", String(20), nullable=False, unique=True) age ...
create table department ( department_id integer not null auto_increment, name varchar(20), duty varchar(20), primary key (department_id) ); /*===*/ /* Table: tb_activity */ /*===*/ create table tb_activity ( activity_id integer not null auto_increment, cate_id integer, name varch...
class Server2Group(Base): __tablename__ = 'server2group' id = Column(Integer, primary_key=True, autoincrement=True) server_id = Column(Integer, ForeignKey('server.id')) group_id = Column(Integer, ForeignKey('group.id')) (3)利用Base的create_all创建表 Base.metadata.create_all(engine) ...
1、添加一列:alter table t1 add column c2 int; (column关键字可以省略) 2、修改某列:alter table t1 modify c2 smallint; 3、删除一列:alter table t1 drop column c2;(column关键字可以省略) 4、alter table t1 change 旧列名 新列名 数据类型;(提示:数据类型可改可不改) 1. 2. 3. 4. DROP TA...
class DeviceLogin(Base): __tablename__ = 'devicelogin' id = Column(Integer, primary_key=True, autoincrement=True) devicename = Column(String(50), comment="设备名称") host = Column(String(50), comment="设备登录IP") port = Column(Integer, default=22, comment="登录端口号") username =...
autoincrement: (False)是否是主键 default: (None)默认值 index: (None)索引 nullable: (True)是否可以为空(NULL) primary_key: (False)是否是主键 server_default: (None)服务端(数据库中的函数)默认值 unique: (False)是否唯一 comment: (None)列注释 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点...
//Login to MySQLmysql-u root-p//Create database named example_dbCREATEDATABASEexample_db; 1. 2. 3. 4. 5. 创建数据库表 :users 复制 CREATETABLE`users`(`id`intunsignedNOTNULLAUTO_INCREMENT,`name`varchar(255)DEFAULTNULL,`created_at`timestampNOTNULLDEFAULTCURRENT_TIMESTAMP,PRIMARYKEY(`id`))...
# coding: utf-8fromsqlalchemyimportColumn, Integer, String,Date,Numeric,Textfromsqlalchemy.ext.declarativeimportdeclarative_base# 创建对象的基类:Base = declarative_base()classProduct(Base):# 表的名字:__tablename__ ='product'# 表的结构:PRODUCTID = Column(Integer,autoincrement=True, primary_key=...
create table humans( id INT AUTO_INCREMENT PRIMARY KEY, name varchar(64), age int, gender varchar(8), job varchar(64) ); insert into humans(name, age, gender, job) values ('tom', 25, 'male', 'teacher'), ('jerry', 35, 'male', 'astronaut'), ...
问SQLAlchemy:如何向现有表添加列？EN当在MySQL数据库中，自增ID是一种常见的主键类型，它为表中的每...