Python3使用mysql.connector操作mysql数据库

一、下载与安装

下载mysql.connector：到http://dev.mysql.com/downloads/connector/python/下载并安装

二、使用

1、连接数据库

import mysql.connector#引入库
from mysql.connector import errorcode

try:
cnx = mysql.connector.connect(user='scott',password='',
                              host='127.0.0.1',
database='testt')#配置信息
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 exists")
else:
print(err)
else:
cnx.close()

2、select查询

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()

3、insert插入

import mysql.connector

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

tomorrow = datetime.now().date() + timedelta(days=1)

add_employee = ("INSERT INTO employees "
"(first_name, last_name, hire_date, gender, birth_date) "
"VALUES (%s, %s, %s, %s, %s)")
add_salary = ("INSERT INTO salaries "
"(emp_no, salary, from_date, to_date) "
"VALUES (%(emp_no)s, %(salary)s, %(from_date)s, %(to_date)s)")

data_employee = ('Geert', 'Vanderkelen', tomorrow, 'M', date(1977, 6, 14))

# 插入emploee
cursor.execute(add_employee, data_employee)
emp_no = cursor.lastrowid

# 插入salary
data_salary = {
'emp_no': emp_no,
'salary': 50000,
'from_date': tomorrow,
'to_date': date(9999, 1, 1),
}
cursor.execute(add_salary, data_salary)

# 这里一定不要忘，必须commit提交插入
cnx.commit()

cursor.close()
cnx.close()

3、delete删除还有update的方法和insert类似，自己尝试一下就明白了