python常用sql语句

 1 #coding=utf-8
 2 import MySQLdb
 3 conn = MySQLdb.Connect(host = ‘127.0.0.1‘,port=3306,user=‘root‘,passwd=‘‘,db=‘test‘,charset=‘utf8‘)
 4 cursor = conn.cursor()
 5 
 6 try:
 7     #插入数据
 8     sql_insert = "insert into orders(order_id,product_id) values (777,777)"
 9     cursor.execute(sql_insert)
10     print cursor.rowcount
11 
12     #修改数据
13     sql_update = "update orders set order_id = 99999 where id=12"
14     cursor.execute(sql_update)
15     print cursor.rowcount
16 
17     #删除数据
18     sql_delete = "delete from orders where id = 3"
19     cursor.execute(sql_delete)
20     print cursor.rowcount
21 
22     #提交
23     conn.commit()
24 except Exception as e:
25     print e
26     conn.rollback()
27     
28 #关闭指针和连接
29 cursor.close()
30 conn.close()