Python操作mysql数据库实现增删查改功能的方法
2018-01-15 10:34
1126 查看
本文实例讲述了Python操作mysql数据库实现增删查改功能的方法。分享给大家供大家参考,具体如下:
#coding=utf-8 import MySQLdb class Mysql_Oper: def __init__(self,host,user,passwd,db): self.host=host self.user=user self.passwd=passwd self.database=db def db_connecet(self): try: #连接 conn=MySQLdb.connect(host=self.host,user=self.user,passwd=self.passwd,db=self.database,charset="utf8") cursor = conn.cursor() except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def drop_table(self,table): try: #删除表 sql = "drop table if exists" + table cursor.execute(sql) except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def create_table(self,table): try: if table=="dept": #创建 sql = "create table if not exists dept(deptno int primary key, dname varchar(50),loc varchar(50))" cursor.execute(sql) elif table=="emp": sql == "create table if not exists emp(empno INT PRIMARY KEY,ename VARCHAR(50),job VARCHAR(50),mgr INT,hiredate DATE,sal DECIMAL(7,2),COMM DECIMAL(7,2),deptno INT,loc varchar(50),CONSTRAINT fk_emp FOREIGN KEY(mgr) REFERENCES emp(empno))" cursor.execute(sql) elif table=="salgrade": sql = "create table if not exists salgrade(grade INT PRIMARY KEY,losal INT,hisal INT)" cursor.execute(sql) elif table=="stu": #创建 sql = "create table if not exists dept(sid INT PRIMARY KEY,sname VARCHAR(50),age INT,gander VARCHAR(10),province VARCHAR(50),tuition INT)" cursor.execute(sql) else: print u"输入错误的表名,表明为dept、emp、salgrade、stu..." except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def inser_onedata_table(self,table): try: if table=="dept": sql = "insert into dept values(%s,%s,%s)" param = (40, 'cai wu bu', 'wu han') n = cursor.execute(sql,param) print 'insert',n elif table=="emp": sql = "insert into emp values(%s,%s,%s,%s,%s,%s,%s,%s)" param = (1009, 'a niu', 'dong shi zhang', NULL, '2001-11-17', 50000, NULL, 10) n = cursor.execute(sql,param) print 'insert',n elif table=="salgrade": sql = "insert into salgrade values(%s,%s,%s)" param = (1, 7000, 12000) n = cursor.execute(sql,param) print 'insert',n elif table=="stu": sql = "insert into stu values(%s,%s,%s,%s,%s,%s)" param = ('1', '001', '23', 'nan', 'bei jing', '1500') n = cursor.execute(sql,param) print 'insert',n else: print u"输入错误的表名,表明为dept、emp、salgrade、stu..." except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def inser_muldata_table(self,table): try: if table=="dept": sql = "insert into dept values(%s,%s,%s)" param = ((10, 'jiao yan bu', 'bei jing'),(20, 'xue gong bu', 'shang hai'),(30, 'xiao shou bu', 'guang zhou')) n = cursor.executemany(sql,param) print 'insert',n elif table=="emp": sql = "insert into emp values(%s,%s,%s,%s,%s,%s,%s,%s)" param = ((1004, 'liu bei', 'jing li', 1009, '2001-04-02', 29750, NULL, 20), (1006, 'guan yu', 'jing li', 1009, '2001-05-01', 28500, NULL, 30), (1008, 'zhu ge liang', 'fen xi shi', 1004, '2007-04-19', 30000, NULL, 20), (1013, 'pang', 'fen xi shi', 1004, '2001-12-03', 30000, NULL, 20), (1002, 'dai', 'xiao shou yuan', 1006, '2001-02-20', 16000, 3000, 30), (1003, 'tian zheng', 'xiao shou yuan', 1006, '2001-02-22', 12500, 5000, 30), (1005, 'xie xun', 'xiao shou yuan', 1006, '2001-09-28', 12500, 14000, 30), (1010, 'wei yi xiao', 'xiao shou yuan', 1006, '2001-09-08', 15000, 0, 30) ) n = cursor.executemany(sql,param) print 'insert',n elif table=="salgrade": sql = "insert into salgrade values(%s,%s,%s)" param = ((2, 12010, 14000),(3, 14010, 20000),(4, 20010, 30000),(5, 30010, 99990)) n = cursor.executemany(sql,param) print 'insert',n elif table=="stu": sql = "insert into stu values(%s,%s,%s,%s,%s,%s)" param = ( ('2', '002', '25', 'nan', 'liao ning', '2500'), ('3', '003', '22', 'nan', 'bei jing', '3500'), ('4', '004', '25', 'nan', 'bei jing', '1500'), ('5', '005', '23', 'nv', 'bei jing', '1000'), ('6', '006', '22', 'nv', 'shan dong', '2500'), ('7', '007', '21', 'nv', 'bei jing', '1600'), ('8', '008', '23', 'nan', 'bei jing', '3500'), ('9', '009', '23', 'nv', 'guang zhou', '2500'), ('10', '010', '18', 'nan', 'shan xi', '3500'), ('11', '011', '23', 'nan', 'hu bei', '4500'), ('12', '011', '24', 'nan', 'bei jing', '1500'), ('13', '011', '24', 'nan', 'liao ning', '2500'), ('14', '011', '22', 'nan', 'bei jing', '3500'), ('15', '011', '25', 'nan', 'bei jing', '1500'), ('16', '011', '23', 'nv', 'bei jing', '1000'), ('17', '011', '22', 'nv', 'shan dong', '2500'), ('18', '011', '21', 'nv', 'bei jing', '1600'), ('19', '011', '23', 'nan', 'bei jing', '3500'), ('20', '011', '23', 'nv', 'guang zhou', '2500'), ('21', '011', '18', 'nan', 'shan xi', '3500'), ('22', '011', '23', 'nan', 'hu bei', '4500'), ('23', '011', '23', 'nan', 'bei jing', '1500'), ('24', '011', '25', 'nan', 'liao ning', '2500'), ('25', '011', '22', 'nan', 'bei jing', '3500'), ('26', '011', '25', 'nan', 'bei jing', '1500'), ('27', '011', '23', 'nv', 'bei jing', '1000'), ('28', '011', '22', 'nv', 'shan dong', '2500'), ('29', '011', '21', 'nv', 'bei jing', '1600'), ('30', '011', '23', 'nan', 'bei jing', '3500'), ('31', '011', '23', 'nv', 'guang zhou', '2500'), ('32', '011', '18', 'nan', 'shan xi', '3500'), ('33', '033', '23', 'nan', 'hu bei', '4500'), ('34', '034', '23', 'nan', 'bei jing', '1500'), ('35', '035', '25', 'nan', 'liao ning', '2500'), ('36', '036', '22', 'nan', 'bei jing', '3500'), ('37', '037', '25', 'nan', 'bei jing', '1500'), ('38', '038', '23', 'nv', 'bei jing', '1000'), ('39', '039', '22', 'nv', 'shan dong', '2500'), ('40', '040', '21', 'nv', 'bei jing', '1600'), ('41', '041', '23', 'nan', 'bei jing', '3500'), ('42', '042', '23', 'nv', 'guang zhou', '2500'), ('43', '043', '18', 'nan', 'shan xi', '3500'), ('44', '044', '23', 'nan', 'hu bei', '4500'), ('45', '045', '23', 'nan', 'bei jing', '1500'), ('46', '046', '25', 'nan', 'liao ning', '2500'), ('47', '047', '22', 'nan', 'bei jing', '3500'), ('48', '048', '25', 'nan', 'bei jing', '1500'), ('49', '049', '23', 'nv', 'bei jing', '1000'), ('50', '050', '22', 'nv', 'shan dong', '2500'), ('51', '051', '21', 'nv', 'bei jing', '1600'), ('52', '052', '23', 'nan', 'bei jing', '3500'), ('53', '053', '23', 'nv', 'guang zhou', '2500'), ('54', '054', '18', 'nan', 'shan xi', '3500'), ('55', '055', '23', 'nan', 'hu bei', '4500') ) n = cursor.executemany(sql,param) print 'insert',n else: print u"输入错误的表名,表明为dept、emp、salgrade、stu..." except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def update_table(self,table,no,upno): try: if table=="dept": #创建 sql = "update dept set deptno=%s where deptno=" +no param = (upno) n = cursor.execute(sql,param) print 'update',n elif table=="emp": sql = "update emp set empno=%s where empno=" +no param = (upno) n = cursor.execute(sql,param) print 'update',n elif table=="salgrade": sql = "update salgrade set grade=%s where grade=" +no param = (upno) n = cursor.execute(sql,param) print 'update',n elif table=="stu": sql = "update stu set sname=%s where sname=" +no param = (upno) n = cursor.execute(sql,param) print 'update',n else: print u"输入错误的表名,表明为dept、emp、salgrade、stu..." except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def query_data(self,table): try: #查询 sql="select * from "+table n = cursor.execute(sql) print cursor.fetchall() for row in cursor.fetchall(): print row for r in row: print r except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) def delete_data(self,table,no) try: if table=="dept": sql = "delete from dept where deptno=%s" param = (upno) n = cursor.execute(sql,param) print 'delete',n elif table=="emp": sql = "delete from emp where empno=%s" param = (upno) n = cursor.execute(sql,param) print 'delete',n elif table=="salgrade": sql = "delete from salgrade where grade=%s" param = (upno) n = cursor.execute(sql,param) print 'delete',n elif table=="stu": sql = "delete from stu where sname=%s " param = (upno) n = cursor.execute(sql,param) print 'delete',n else: print u"输入错误的表名,表明为dept、emp、salgrade、stu..." except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) del down_db(self): try: cursor.close() #提交 conn.commit() #关闭 conn.close() except MySQLdb.Error,e: print "Mysql Error %d: %s" % (e.args[0], e.args[1]) mysqlDB=Mysql_Oper("127.0.0.1","root","root","exam") mysqlDB.db_connecet() mysqlDB.drop_table("dept") for table in ["dept","emp","salgrade","stu"] mysqlDB.create_table(table) mysqlDB.inser_onedata_table(table) mysqlDB.inser_muldata_table(table) mysqlDB.query_data(table) mysqlDB.down_db()
后期我会把数据整合到CSV文件中,操作CSV文件对数据进行操作
更多关于Python相关内容感兴趣的读者可查看本站专题:《Python+MySQL数据库程序设计入门教程》、《Python常见数据库操作技巧汇总》、《Python数学运算技巧总结》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》
希望本文所述对大家Python程序设计有所帮助。
您可能感兴趣的文章:
相关文章推荐
- python操作mysql数据库实现增删改查
- PHP操作MongoDB实现增删改查功能【附php7操作MongoDB方法】
- Python访问MySQL数据库并实现其增删改查功能
- Java操作redis实现增删查改功能的方法示例
- Python访问MySQL数据库并实现其增删改查功能
- python操作mysql数据库实现增删改查
- Python访问MySQL数据库并实现其增删改查功能
- 用python操作mysql数据库(之通过类实现,方便添加功能)
- Python访问MySQL数据库并实现其增删改查功能
- Python实现MySQL操作的方法小结【安装,连接,增删改查等】
- python安装mysql数据库和实现增删查改操作
- python操作mysql数据库实现增删改查
- python实现带错误处理功能的远程文件读取方法
- Java操作MySQL数据库实现增删查改操作
- selenium+python关于操作日历控件实现向日历文本框传递值的方法
- python实现带错误处理功能的远程文件读取方法
- Python 操作LDAP实现用户统一认证密码修改功能
- Python操作Sqlite正确实现方法解析
- python操作MySQL数据库具体方法
- 使用三层架构实现简单的MVC登陆操作!并实现基本的增删改查功能!!