python 基础 9.12 索引

#/usr/bin/python

#-*- coding:utf-8 -*-

#@Time   :2017/11/24 4:48

#@Auther :liuzhenchuan

#@File   :索引.py

 

import MySQLdb

 

# 把分数小于5分的成绩都加6分

sql = '''alter table score add index idx_stdid_couid(std, couid)'''

sql1 = '''alter table score add index idx_couid_stdid(couid, std)'''

 

 

def connect_mysql():

    db_config = {

        "host": "192.168.48.131",

        "port": 3306,

        "user": "ling",

        "passwd": "123456",

        "db": "stuteas",

        "charset": "utf8"

    }

    try:

        cnx = MySQLdb.connect(**db_config)

    except Exception as e:

        raise e

    return cnx

 

if __name__ == "__main__":

    cnx = connect_mysql()

    cus = cnx.cursor()

    try:

        cus.execute(sql)

        result1 = cus.fetchall()

        print(result1)

 

        cus.close()

        cnx.commit()

    except Exception as e:

        cnx.rollback()

        raise e

    finally:

        cnx.close()