# 需要事先创建好数据库:create database db1 charset utf8; #2 创建引擎 egine=create_engine('mysql+pymysql://root@127.0.0.1/db1?charset=utf8') #3 执行sql # egine.execute('create table if not EXISTS t1(id int PRIMARY KEY auto_increment,name char(32));') # cur=egine.execute('inse...
二、进入venv 三、切换到项目Sample\文件夹,进入manager.py 的shell python manager.py shell 四、创建data.sqlite数据库 AI检测代码解析 from app import db from app import models db.create_all() 1. 2. 3. Sample\app下就会生成一个data.sqlite文件 五、在Pycharm中导入数据库,方便可视化 Data Source -...
import pandas as pd from sqlalchemy import create_engine import pymysql # 导入必要三模块 # 查询语句,选出customer2018表中的所有数据 sql = 'select * from customer2018;' df = pd.read_sql_query(sql, engine) # read_sql_query的两个参数: sql语句, 数据库连接 df = pd.read_sql_query(sql, ...
engine = create_engine("mysql+pymysql://root:123123@192.168.1.152:3306/LCJ", max_overflow=5) #生成sqlORM基类 Base = declarative_base() # 单表 class Lcj(Base): #继承基类中所有子类方法 __tablename__ = 'xiaoluo' #创建表名:test #设置nid为主键ID,并且设置id为自增就加,Column:表示列 nid...
engine = create_engine('postgresql+psycopg2://scott:tiger@localhost/mydatabase') pg8000 代码语言:javascript 代码运行次数:0 运行 AI代码解释 engine = create_engine('postgresql+pg8000://scott:tiger@localhost/mydatabase') More notes on connecting to PostgreSQL at PostgreSQL. MySQL 代码语言:javascript...
ext.declarative import declarative_base from sqlalchemy import Column, Integer, String, DateTime, Boolean engine = create_engine('mysql+pymysql://username:passwd@localhost:port/db?charset=utf8', max_overflow=5) # max_overflow 最多多几个连接 Base = declarative_base() Session = sessionmaker(bind...
importpymysql conn=pymysql.connect(host="localhost",port=3306,user="root",password="123456",db="it",charset="utf8") cursor=conn.cursor() sql=""" create table user( id int PRIMARY KEY auto_increment, username VARCHAR(20), password VARCHAR(20), ...
>>> from sqlalchemy import create_engine Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib64/python2.7/site-packages/sqlalchemy/__init__.py", line 9, in <module> from .engine import create_engine File "/usr/lib64/python2.7/site-packages/sql...
sessionmaker def delete_data(): # 初始化数据库连接 engine = create_engine("mysql+pymysql://root:@localhost:3306/orm_test", encoding="utf-8") # 创建DBSession类型 DBSession = sessionmaker(bind=engine) # 创建session对象 session = DBSession() # 数据更新,将Jack的记录删除 update_obj = ...
from sqlalchemy import create_engine dbHost = 'mysql+pymysql://root:root@127.0.0.1:3306/test' engine = create_engine( dbHost, echo=True, # 是否打印SQL pool_size=10, # 连接池的大小,指定同时在连接池中保持的数据库连接数,默认:5 max_overflow=20, # 超出连接池大小的连接数,超过这个数量的连接...