python3.6使用mysql

pymysql.cursors # 连接数据库 connect = pymysql.Connect( host=‘localhost‘, port=3310, user=‘root‘, passwd=‘root‘, db=‘python‘, charset=‘utf8‘ ) # 获取游标 cursor = connect.cursor() # 插入数据 sql = "INSERT INTO trade (name, account, saving) VALUES ( ‘%s‘, ‘%s‘, %.2f )" data = (‘雷军‘, ‘13512345678‘, 10000) cursor.execute(sql % data) connect.commit() print(‘成功插入‘, cursor.rowcount, ‘条数据‘) # 修改数据 sql = "UPDATE trade SET saving = %.2f WHERE account = ‘%s‘ " data = (8888, ‘13512345678‘) cursor.execute(sql % data) connect.commit() print(‘成功修改‘, cursor.rowcount, ‘条数据‘) # 查询数据 sql = "SELECT name,saving FROM trade WHERE account = ‘%s‘ " data = (‘13512345678‘,) cursor.execute(sql % data) for row in cursor.fetchall(): print("Name:%s\tSaving:%.2f" % row) print(‘共查找出‘, cursor.rowcount, ‘条数据‘) # 删除数据 sql = "DELETE FROM trade WHERE account = ‘%s‘ LIMIT %d" data = (‘13512345678‘, 1) cursor.execute(sql % data) connect.commit() print(‘成功删除‘, cursor.rowcount, ‘条数据‘) # 事务处理 sql_1 = "UPDATE trade SET saving = saving + 1000 WHERE account = ‘18012345678‘ " sql_2 = "UPDATE trade SET expend = expend + 1000 WHERE account = ‘18012345678‘ " sql_3 = "UPDATE trade SET income = income + 2000 WHERE account = ‘18012345678‘ " try: cursor.execute(sql_1) # 储蓄增加1000 cursor.execute(sql_2) # 支出增加1000 cursor.execute(sql_3) # 收入增加2000 except Exception as e: connect.rollback() # 事务回滚 print(‘事务处理失败‘, e) else: connect.commit() # 事务提交 print(‘事务处理成功‘, cursor.rowcount) # 关闭连接 cursor.close() connect.close()

 

python3.6使用mysql

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