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  • MySQL在cmd和python下的常用操作

    环境配置1:安装mysql,环境变量添加mysql的bin目录

    环境配置2:python安装MySQL-Python

      请根据自身操作系统下载安装,否则会报c ++ compile 9.0,import _mysql等错误

      windows10 64位操作系统可到 http://www.lfd.uci.edu/~gohlke/pythonlibs/  下载安装MySQL-Python包,至于whl和tar.gz在windows和Linux下的安装方法可查看我的上一篇文章

    一 、cmd命令下的操作:

      连接mysql:mysql -u root -p

      查看所有数据库:show databases;

      创建test数据库:create database test;

      删除数据库:drop database test;

      使用(切换至)test数据库:use test;

      查看当前数据库下的表:show tables;

      创建UserInfo表:create table UserInfo(id int(5) NOT NULL auto_increment,username varchar(10),password varchar(20) NOT NULL,PRIMARY KEY(id));

      删除表:drop table UserInfo;

      判断数据是否存在:select * from UserInfo where name like 'elijahxb';

      增数据:insert into UserInfo(username,password) value('eljiahxb','123456');

          

      查数据:select * from UserInfo;     select id from UserInfo;     select username from UserInfo;

      改数据:update UserInfo set username = 'Zus' where id=1;    update UserInfo set username='Zus';

      删数据:delete from UserInfo;    delete from UserInfo where id=1;

      断开连接:quit

    二、python下的操作:

      

     1 # -*- coding: utf-8 -*-
     2 #!/usr/bin/env python
     3 
     4 # @Time    : 2017/6/4 18:11
     5 # @Author  : Elijah
     6 # @Site    : 
     7 # @File    : sql_helper.py
     8 # @Software: PyCharm Community Edition
     9 import MySQLdb
    10 
    11 class MySqlHelper(object):
    12     def __init__(self,**args):
    13         self.ip = args.get("IP")
    14         self.user = args.get("User")
    15         self.password = args.get("Password")
    16         self.tablename = args.get("Table")
    17         self.port = 3306
    18         self.conn = self.conn = MySQLdb.Connect(host=self.ip,user=self.user,passwd=self.password,port=self.port,connect_timeout=5,autocommit=True)
    19         self.cursor = self.conn.cursor()
    20 
    21     def Close(self):
    22         self.cursor.close()
    23         self.conn.close()
    24     def execute(self,sqlcmd):
    25         return self.cursor.execute(sqlcmd)
    26     def SetDatabase(self,database):
    27         return self.cursor.execute("use %s;"%database)
    28     def GetDatabasesCount(self):
    29         return self.cursor.execute("show databases;")
    30     def GetTablesCount(self):
    31         return self.cursor.execute("show tables;")
    32     def GetFetchone(self, table = None):
    33         if not table:
    34             table = self.tablename
    35         self.cursor.execute("select * from %s;"%table)
    36         return self.cursor.fetchone()
    37     def GetFetchmany(self,table=None,size=0):
    38         if not table:
    39             table = self.tablename
    40         count = self.cursor.execute("select * from %s;"%table)
    41         return self.cursor.fetchmany(size)
    42     def GetFetchall(self,table=None):
    43         '''
    44         :param table: 列表
    45         :return:
    46         '''
    47         if not table:
    48             table = self.tablename
    49         self.cursor.execute("select * from %s;"%table)
    50         return self.cursor.fetchall()
    51     def SetInsertdata(self,table=None,keyinfo=None,value=None):
    52         """
    53         :param table:
    54         :param keyinfo:可以不传此参数,但此时value每一条数据的字段数必须与数据库中的字段数一致。
    55                         传此参数时,则表示只穿指定字段的字段值。
    56         :param value:类型必须为只有一组信息的元组,或者包含多条信息的元组组成的列表
    57         :return:
    58         """
    59         if not table:
    60             table = self.tablename
    61         slist = []
    62         if type(value)==tuple:
    63             valuelen = value
    64             execmany = False
    65         else:
    66             valuelen = value[0]
    67             execmany = True
    68         for each in range(len(valuelen)):
    69             slist.append("%s")
    70         valuecenter = ",".join(slist)
    71         if not keyinfo:
    72             sqlcmd = "insert into %s values(%s);"%(table,valuecenter)
    73         else:
    74             sqlcmd = "insert into %s%s values(%s);" % (table,keyinfo,valuecenter)
    75         print(sqlcmd)
    76         print(value)
    77         if execmany:
    78             return self.cursor.executemany(sqlcmd,value)
    79         else:
    80             return self.cursor.execute(sqlcmd, value)
    MySqlHelper
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  • 原文地址:https://www.cnblogs.com/elijahxb/p/6943120.html
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