使用Connector / Python连接MySQL

connect()构造函数创建到MySQL服务器的连接并返回一个 MySQLConnection对象

在python中有以下几种方法可以连接到MySQL数据库：

1.使用connect()构造函数

import mysql.connector

cnx = mysql.connector.connect(user='scott', password='password',

host='127.0.0.1',

database='employees')

cnx.close()

使用connection.MySQLConnection() 类创建连接对象

from mysql.connector import (connection)

cnx = connection.MySQLConnection(user='scott', password='password',

host='127.0.0.1',

database='employees')

cnx.close()

在字典中定义连接参数并使用 **运算符

import mysql.connector

config = {

'user': 'scott',

'password': 'password',

'host': '127.0.0.1',

'database': 'employees',

'raise_on_warnings': True

}

cnx = mysql.connector.connect(**config)

cnx.close()

处理链接错误使用try语句并使用error.Error异常捕获所有错误

import mysql.connector

from mysql.connector import errorcode

try:

cnx = mysql.connector.connect(user='scott',

database='employ')

except mysql.connector.Error as err:

if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:

print("Something is wrong with your user name or password")

elif err.errno == errorcode.ER_BAD_DB_ERROR:

print("Database does not exist")

else:

print(err)

else:

cnx.close()

2.使用Connector / Python查询数据

import datetime

import mysql.connector

cnx = mysql.connector.connect(user='scott', database='employees')

cursor = cnx.cursor()

query = ("SELECT first_name, last_name, hire_date FROM employees "

"WHERE hire_date BETWEEN %s AND %s")

hire_start = datetime.date(1999, 1, 1)

hire_end = datetime.date(1999, 12, 31)

cursor.execute(query, (hire_start, hire_end))

for (first_name, last_name, hire_date) in cursor:

print("{}, {} was hired on {:%d %b %Y}".format(

last_name, first_name, hire_date))

cursor.close()

cnx.close()

参考链接：