python常用sql语句

 #coding=utf-8
 import MySQLdb
 conn = MySQLdb.Connect(host = '127.0.0.1',port=3306,user='root',passwd='',db='test',charset='utf8')
 cursor = conn.cursor()

 try:
     #插入数据
     sql_insert = "insert into orders(order_id,product_id) values (777,777)"
     cursor.execute(sql_insert)
     print cursor.rowcount

     #修改数据
     sql_update = "update orders set order_id = 99999 where id=12"
     cursor.execute(sql_update)
     print cursor.rowcount

     #删除数据
     sql_delete = "delete from orders where id = 3"
     cursor.execute(sql_delete)
     print cursor.rowcount

     #提交
     conn.commit()
 except Exception as e:
     print e
     conn.rollback()

 #关闭指针和连接
 cursor.close()
 conn.close()