二.数据库游标对象cursor与实例

1.数据库游标对象cursor

2.select实例

代码展示：

 import pymysql
 conn=pymysql.connect(
     host='192.168.199.249',
     port=3306,
     user='root',
     passwd='',
     db='imooc',
     charset='utf8'
 )
 cursor=conn.cursor()

 sql="select * from user"
 cursor.execute(sql)

 rs=cursor.fetchall()
 for row in rs:
     print('userid=%s,username=%s'% row)

 cursor.close()
 conn.close()