Python中pymysql模块通过获取mysql数据库命令行游标执行数据库命令来进行数据库操作
优点：操作数据库语句所见即所得，执行了什么数据库语句都很清楚
缺点：操作繁琐，代码量多
1. pymysql的基本使用
# -*- coding:utf-8 -*- # Author:Wong Du import pymysql # 创建链接，相当于建立一个socket conn = pymysql.Connection(host='10.0.0.100', port=3306, user='root', passwd='123456', db='testdb') # 建立游标，相当于进入 mysql> 命令操作界面 cursor = conn.cursor() # 建表，和mysql命令行操作一样 try: create_table = cursor.execute('''create table student( id int not null primary key auto_increment, name char(32) not null, register_date date not null DEFAULT "2018-05-09" ); ''') except pymysql.err.InternalError as e: # print(type(e)) print(" 33[31;1m%s; Do nothing... 33[0m" %e) # 插入数据 insert = cursor.execute('insert into student (name,register_date) values("junry", "2017-03-14");') insert2 = cursor.execute('insert into student (name,register_date) values("hongfa", "2015-03-14");') insert3 = cursor.execute('insert into student (name,register_date) values("jinglin", "2016-03-14");') # 查看表数据 select = cursor.execute('select * from student;') for line in cursor.fetchall(): print(line) # 修改表数据 update = cursor.execute('update student set name="junwei" where id=1') select2 = cursor.execute('select * from student;') print(cursor.fetchone()) # 删除表数据 delete = cursor.execute('delete from student;') select3 = cursor.execute('select * from student;') if cursor.fetchall(): print(cursor.fetchall()) else: print("This is a empty table...") # 提交 conn.commit() cursor.close() # 关闭游标 conn.close() # 关闭连接 # 等等 等等。。。
循环插入数据
# -*- coding:utf-8 -*- # Author:Wong Du import pymysql # 建立连接 conn = pymysql.Connect(host='10.0.0.100', port=3306, user='root', passwd='123456', db='testdb') # 创建游标 cursor = conn.cursor() # 循环插入列表 many_list = [ ('zhangsan', '2011-11-11'), ('lisi', '2012-11-11'), ('wangwu', '2022-10-09'), ] # 循环插入（插入多条内容） cursor.executemany("insert into student (name, register_date) VALUE(%s, %s);", many_list) # 修改游标位置 cursor.scroll(1, mode='relative') # 相对移动，默认为relative cursor.scroll(1, mode='absolute') # 绝对移动 # fetchone()获取一行数据、fetchmany(num)获取指定行数据、fetchall()获取所有行数据 cursor.execute("select * from student;") for line in cursor.fetchall(): print(line) # 清楚student表的数据 cursor.execute("delete from student;") # 提交 conn.commit() cursor.close() # 关闭游标 conn.close() # 关闭连接