20200204python连接数据库

1、安装python驱动

  pip3 install pymysql

2、数据库操作命令

https://www.cnblogs.com/UncleYong/p/7753188.html

创建数据库设置字符集create database qzcsbj CHARACTER SET utf8;

打开创建的数据库：use qzcsbj;

创建表：create table tablename (id int(5),name varchar(255),sex int(5),ega in(5));

查询表结构：desc tablename;

插入数据：insert users(id,name,sex,ega) values(1,'qzcsbj1',0,20),(2,'qzcsbj2',1,25),(3,'qzcsbj3',0,22),(4,'qzcsbj4',0,21);

3、连接测试

查询 端口mysql>show global variables like 'port';

import pymysql
from pymysql.cursors import DictCursor
coon = pymysql.connect(host='192.168.72.128',port=3306,user='root',passwd='123456',db='mysql',charset='utf8')  # 创建数据库连接
cur = coon.cursor(DictCursor)  # 建立游标,指定游标类型，返回字典
sql='select * from user limit 2;'  # 操作语句，只查询前两行
cur.execute(sql)  # 执行sql语句
res = cur.fetchall()  # 获取查询的所有结果
print(res)  # 打印结果
cur.close()  # 关闭游标
coon.close()   # 关闭连接