# 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...
1fromsqlalchemyimportcreate_engine2engine = create_engine('mysql+pymysql://root:x@127.0.0.1/test',3echo=True,#设置为True,则输出sql语句4pool_size=5,#数据库连接池初始化的容量5max_overflow=10,#连接池最大溢出容量,该容量+初始容量=最大容量。超出会堵塞等待,等待时间为timeout参数值默认3067pool_re...
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, ...
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 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 -> Sqlite(Xerial...
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...
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...
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 from sqlalchemy.orm import declarative_base from sqlalchemy import Column,Integer,String,DateTime from sqlalchemy.orm import sessionmaker from sqlalchemy.dialects.mysql import LONGTEXT Base = declarative_base() db_url = "mysql+pymysql://root:123456@192.168.200.19...
importenum fromdatetimeimportdatetime fromdecimalimportDecimal importsqlalchemy fromsqlalchemyimportcreate_engine,DateTime,func,String fromsqlalchemy.ormimportMapped,DeclarativeBase,mapped_column engine=create_engine('mysql+pymysql://root:zhangdapeng520@127.0.0.1:3306/fastzdp_sqlalchemy?charset=utf8') class...
>>> 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...