pycharm连接mysql

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#python #pycharm #mysql

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本文详细介绍如何使用 Python 的 pymysql 库进行 MySQL 数据库的基本操作，包括创建表、插入数据、删除数据、更新数据以及查询数据。通过具体代码示例，读者可以学习到连接数据库、执行 SQL 语句、处理查询结果等实用技能。

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1，获取连接

self.con=pymysql.connect('localhost','root','123456','test',charset='utf8')

2，获取游标

cursor=self.con.cursor()

3.1，增删改

cursor.execute('insert into student values (1,"诸葛",18,"男")')
cursor.execute('delete from student where id=3')
cursor.execute('update student set sex="女" where id=2')
self.con.commit()

3.2，查询

cursor.execute('select * from student')
resultset =cursor.fetchall()
for item in resultset:
    print(item)

4.关闭连接

self.con.close()

连接实例

import pymysql


class mysqlconnect():
    def __init__(self):
        self.con=pymysql.connect('localhost','root','123456','test',charset='utf8')
        print(self.con)
    def creattable(self):
        try:
            cursor=self.con.cursor()
            cursor.execute('drop table if exists student')
            cursor.execute('create table student (id int (4),name char(10),age int(4),sex char(2))')
            self.con.commit()
        except:
            raise
        finally:
            self.con.close()
    def insertdata(self):
        try:
            cursor=self.con.cursor()
            cursor.execute('insert into student values (1,"诸葛",18,"男")')
            cursor.execute('insert into student values (2,"赵云",20,"男")')
            cursor.execute('insert into student values (3,"貂蝉",22,"女")')
            self.con.commit()
        except:
            raise
        finally:
            self.con.close()
    def deldata(self):
        try:
            cursor=self.con.cursor()
            cursor.execute('delete from student where id=3')
            self.con.commit()
        except:
            raise
        finally:
            self.con.close()
    def upddata(self):
        try:
           cursor= self.con.cursor()
           cursor.execute('update student set sex="女" where id=2')
           self.con.commit()

        except:
            raise
        finally:
            self.con.close()
    def selectdata(self):
        try:
           cursor= self.con.cursor()
           cursor.execute('select * from student')
           resultset =cursor.fetchall()
           for item in resultset:
               print(item)
        except:
            raise
        finally:
            self.con.close()


if __name__=='__main__':
    mysqlcon=mysqlconnect()
    # mysqlcon.creattable()
    #mysqlcon.insertdata()
    # mysqlcon.deldata()
    # mysqlcon.upddata()
    mysqlcon.selectdata()