1.常规连接 :pymysql,pandas
import pymysql as mysqlimport pandas as pdcon = mysql.connect(host="数据库地址",port=端口号,user="用户名",passwd="密码",db="数据库名称",charset="utf8mb4")mycursor = con.cursor()print("连接成功")# 查询sql = "select * from 数据库表名 where 字段名=xx and .."result = pd.read_sql(sql,con=con)print(result)#删除sql = "delete from 数据库表名"mycursor.execute(sql)print("删除数据长度:",mycursor.rowcount)
2.导入sqlalchemy
from sqlalchemy import create_enginefrom urllib.parse import quote_plus as urlquotepymysql.install_as_MySQLdb()conn = create_engine('mysql+mysqldb://root:/密码@数据库地址:端口号/数据库名称?charset=utf8')#插入数据data.to_sql(name=数据库表名, con=conn, if_exists='append', index=False) # append增加
2.1 当遇到数据库密码包含“@”字符时(查了很多博客)
userName = "用户名"password ="@123456"dbHost =" 数据库地址"dbPort = 端口号dbName = "数据库名称"DB_ConNECT = f'mysql+pymysql://{userName}:{urlquote(password)}@{dbHost}:{dbPort}/{dbName}?charset=utf8'conn = create_engine(DB_CONNECT,max_overflow=50, # 超过连接池大小外最多创建的连接 pool_size=50, # 连接池大小 pool_timeout=60, # 池中没有线程最多等待的时间,否则报错 pool_recycle=3600, # 多久之后对线程池中的线程进行一次连接的回收(重置) encoding='utf-8', echo=False, pool_pre_ping=True )