本地搭建的mysql的新建的表的数据如下：

 在pycham中连接mysql 执行sql  ，举例编写如下：

import pymysql

if __name__ == ‘__main__‘:
    connect = pymysql.connect(host=‘localhost‘,
                              port=3307,
                              user=‘root‘,
                              password=‘111111‘,
                              database=‘autotest‘,
                              charset=‘utf8‘)
    # 创建游标对象
    cur = connect.cursor()
    # 执行sql命令,注意防止sql注入
    cur.execute(‘insert into autotest.stu_infos (stu_id,stu_name,stu_age,stu_grade) values ("NO_0005","小宁",29,89.88)‘)    #执行insert语句
    cur.execute("update %s set stu_name=‘%s‘ where stu_name=‘%s‘;" % ("autotest.stu_infos", "黄征", "小远"))    #执行更新语句
    cur.execute("DELETE FROM %s  where stu_name=‘%s‘;" % ("autotest.stu_infos", "小杨"))    #执行删除语句 
    cur.execute("select * from %s ;" % "autotest.stu_infos")    #执行查询语句
    value = cur.fetchall()   #获取所有行
    print(value)
    connect.commit()  # 提交数据修改
    connect.close()  # 关闭数据库链接

python_pycham，连接数据库，执行sql