# -*- encoding: utf-8 -*-
'''
@File    :   mysql_conn.py   
@License :   (C)Copyright 2018-2022

@Modify Time      @Author    @Version    @Desciption
------------      -------    --------    -----------
2023/4/13 13:59   zart20      1.0         None
'''

# pymysql 链接示例

import pymysql


# db = pymysql.connect(host="127.0.0.1", port=3306, user='root', password="123123", charset="utf8")    # 链接数据库管理系统
db = pymysql.connect(host="127.0.0.1", port=3306, user='root', password="123123", charset="utf8", database="student")   # 链接数据库

cursor = db.cursor()        # 实例化游标对象

cursor.execute("show databases;")   # 显示所有数据库
cursor.execute("use student;")      # 选择指定数据库
cursor.execute("show tables;")      # 执行数据库查询

data = cursor.fetchall()    #   取出游标中所有内容
print(data)

cursor.close()

c2 = db.cursor()
# c2.execute("show databases;")
c2.execute("show tables;")
print(c2.fetchall())

# db.close()      # 关闭数据库链接

# c3 = db.cursor()
# c3.execute("show databases;")
# print(c3.fetchall())