Python连接MySQL数据库，并创建数据库、数据表、插入删除查询修改记录等

Python连接MySQL数据库，并创建数据库、数据表、插入删除查询修改记录等
1.下载安装并导入pymysql库
用cmd命令pip3 install pymysql下载安装
之后再导入库

import pymysql

2.连接并创建数据库，数据表

import pymysql

DBHOST = 'localhost'
DBUSER = 'root'
DBPASS = '123456'
DBNAME = 'test'

try:
	db=pymysql.connect(DBHOST,DBUSER,DBPASS,DBNAME)
	print('数据库成功连接！')
	cur=db.cursor()
	cur.execute("DROP TABLE IF EXISTS student")
	sql='CREATE TABLE student(name VARCHAR(20) NOT NULL,Email VARCHAR(20),Age int)'
	cur.execute(sql)
except pymysql.Error as e:
	print('表格创建失败：'+str(e))

3.在表中插入一条数据

import pymysql

DBHOST = 'localhost'
DBUSER = 'root'
DBPASS = '123456'
DBNAME = 'test'

try:
	db=pymysql.connect(DBHOST,DBUSER,DBPASS,DBNAME)
	print('数据库成功连接！')
	cur=db.cursor()
sql='INSERT INTO student(name,Email,Age) VALUE(%s,%s,%s)'
	value=('Qiaoxin','[email protected]',19)
	cur.execute(sql,value)
	db.commit()
	print('数据插入成功！')
except pymysql.Error as e:
	print('数据插入失败：'+str(e))
	db.rollback()
db.close()

3.查询表中数据**

import pymysql

DBHOST = 'localhost'
DBUSER = 'root'
DBPASS = '123456'
DBNAME = 'test'

try:
	db=pymysql.connect(DBHOST,DBUSER,DBPASS,DBNAME)
	print('数据库成功连接！')
	cur=db.cursor()
	sql="SELECT * FROM student"# 此处单双引号均可
	cur.execute(sql)
	results=cur.fetchall() #接收数据
	for row in results:     #循环打印数据
		name=row[0]
		email=row[1]
		age=row[2]
	print('name:%s,Email:%s,Age:%s'%(name,email,age))
except pymysql.Error as e:
	print('数据查询失败：'+str(e))
db.close()