【python基于mysql数据库实现无页面学生信息管理系统】

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前言

本篇文章能让你快速掌握利用python对数据库的增删改查。以及一个简单的案例。本节案例共有两个sql数据表，一个是学生个人信息的存储表，一个是学生成绩的存储表。

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一、分步讲解

0.创建两张数据表

1.大概思路

我们会基于这些功能，一步一步进行功能的实现。

2.首先连接数据库

import pymysql # python对mysql进行操作的库
# 
connection = pymysql.connect(host='127.0.0.1',
							 port=3306, 
							 user='root', # 填写你真实的
							 password='', # 填写你的密码
							 db='students',     # 填写你的
                             charset='utf8')
print("连接成功")

3.查看所有学生成绩信息

import pymysql

connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
c1 = connection.cursor()
count = c1.execute('select id,st_uid,name,chinese,math,english,total from students.student_all where id>=1')
for _ in range(1):
    result = c1.fetchall()
    print(result)   # 元组对象

4.查看所有学生个人信息

import pymysql

connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
c1 = connection.cursor()
count = c1.execute('select id,st_uid,name,sex,birthday,tel,path,remark from students.student_data where id>=1')
print(count)
for _ in range(1):
    result = c1.fetchall()
    print(result)   

5.查看指定学生成绩信息

根据输入的姓名，进行查找

import pymysql


conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',charset='utf8')
print("连接成功。")
name = input("请输入学生姓名:")
cursor = conn.cursor()
sql = cursor.execute(f'select id,st_uid,name,sex,date_format(birthday,"%Y-%m-%d"),tel,path,remark from students.student_data where name like "%'+name+'%";')


print(cursor.fetchone( ))

6.添加学生个人信息

import pymysql


connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
print("连接成功。")
id= int(input("请输入id:"))
st_uid= int(input("请输入uid:"))
name= input("请输入名字:")
sex = input("请输入性别:")
birthday = input("请输入生日:")
tel = input("请输入电话(11位):")
path = input("请输入地址:")
remark = input("请输入简介:")
cursor = connection.cursor()
one_data = f"insert into students.student_data values (%s,%s,%s,%s,%s,%s,%s,%s); "

cursor.execute(one_data,(id,st_uid,name,sex,birthday,tel,path,remark))
connection.commit()
print("写入成功")

7.添加学生成绩信息

import pymysql


connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
print("连接成功。")
id= int(input("请输入id:"))
st_uid= int(input("请输入uid:"))
name= input("请输入名字:")
chinese = int(input("请输入语文成绩"))
math = int(input("请输入数学成绩"))
english = int(input("请输入英语成绩"))
total = chinese + math + english
cursor = connection.cursor()
one_data = f"insert into students.student_all values (%s,%s,%s,%s,%s,%s,%s); "

cursor.execute(one_data,(id,st_uid,name,chinese,math,english,total))
connection.commit()
print("写入成绩成功")

8.修改学生个人信息

import pymysql

connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
print("连接成功。")
cursor = connection.cursor()
st_uid = input("请输入要修改的学号:")
sql0 = cursor.execute(f'select id,st_uid,name,sex,date_format(birthday,"%Y-%m-%d"),tel,path,remark from students.student_data where st_uid like "%'+st_uid+'%";')
print(cursor.fetchone())
name= input("请输入名字:")
sex = input("请输入性别:")
birthday = input("请输入生日:")
tel = input("请输入电话(11位):")
path = input("请输入地址:")
remark = input("请输入简介:")
sql = 'UPDATE students.student_data SET name="%s", sex="%s", birthday="%s" , tel="%s" , path="%s", remark="%s" WHERE st_uid="%s"' % (name,sex,birthday,tel,path,remark,st_uid)
rows = cursor.execute(sql)
connection.commit()
print("修改完成")

9.修改学生成绩信息

import pymysql


connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                             charset='utf8')
print("连接成功。")
cursor = connection.cursor()
st_uid = input("请输入要修改的学号:")
sql0 = cursor.execute(f'select * from students.student_all where st_uid like "%'+st_uid+'%";')
print(cursor.fetchone())
name= input("请输入名字:")
chinese = int(input("请输入语文成绩:"))
math = int(input("请输入数学成绩:"))
english = int(input("请输入英语成绩:"))
total = chinese + math + english
print()
sql = 'UPDATE students.student_all SET name="%s",chinese="%s",math="%s",english="%s",total="%s"  WHERE st_uid="%s"' % (name,chinese,math,english,total,st_uid)
rows = cursor.execute(sql)
connection.commit()
print("修改完成")

10.删除学生成绩信息

import pymysql

conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',charset='utf8')
print("连接成功。")
st_uid = int(input("请输入要删除的学号:"))
cursor = conn.cursor()
sql = 'delete from students.student_all where st_uid="%d"'% st_uid
cursor.execute(sql)
conn.commit()
print("删除成功")
cursor.close()
conn.close()

11.删除学生个人信息

import pymysql


conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',charset='utf8')
print("连接成功。")
st_uid = int(input("请输入要删除的学号:"))
cursor = conn.cursor()
sql = 'delete from students.student_data where st_uid="%d"'% st_uid
cursor.execute(sql)
conn.commit()
print("删除成功")
cursor.close()
conn.close()

二.完整系统代码

import time
import pymysql


# 1. 连接数据库
def connect():
    try:
        connection = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='', db='students',
                                     charset='utf8')

        return connection
    except Exception:
        print("连接数据库有问题，请检查配置文件。")

def cursor():
    print("连接成功。")
    c1 = connect( ).cursor( )
    return c1

def m_close():
    cursor().close( )
    connect().close( )
    print("已退出")


# 00_1查看所有学生成绩信息
def view_all():
    c1 = cursor()
    try:
        count = c1.execute('select id,st_uid,name,chinese,math,english,total from students.student_all where id>=1')
        for _ in range(1):
            result = c1.fetchall( )
            print(result)  # 元组对象
    except Exception:
        print("出问题了，请检查")


#01_2查看所有学生个人信息
def data_all():
    c1 = cursor()
    try:
        count = c1.execute('select id,st_uid,name,sex,date_format(birthday,"%Y-%m-%d"),tel,path,remark from students.student_data where id>=1')
        for _ in range(1):
            result = c1.fetchall( )
            print(result)
    except Exception:
        print("出问题了，请检查")
#03_3 查看指定学生成绩信息
def one_achievement():
    name = input("请输入学生姓名:")
    c1 = cursor()
    try:
        sql = c1.execute(
            f'select id,st_uid,name,sex,date_format(birthday,"%Y-%m-%d"),tel,path,remark from students.student_data where name like "%' + name + '%";')
        print(c1.fetchone( ))

    except Exception:
        print("出问题了，请检查")
#04添加学生个人信息
def add_st_data():
    id = int(input("请输入id:"))
    st_uid = int(input("请输入uid:"))
    name = input("请输入名字:")
    sex = input("请输入性别:")
    birthday = input("请输入生日:")
    tel = input("请输入电话(11位):")
    path = input("请输入地址:")
    remark = input("请输入简介:")
    c1 = cursor()
    try:
        one_data = f"insert into students.student_data values (%s,%s,%s,%s,%s,%s,%s,%s); "

        c1.execute(one_data, (id, st_uid, name, sex, birthday, tel, path, remark))
        connect().commit()
        print("写入成功")
    except Exception:
        print("出问题了，请检查")

# 05添加学生成绩信息
def add_achievement():
    id = int(input("请输入id:"))
    st_uid = int(input("请输入uid:"))
    name = input("请输入名字:")
    chinese = int(input("请输入语文成绩"))
    math = int(input("请输入数学成绩"))
    english = int(input("请输入英语成绩"))
    total = chinese + math + english
    c1 = cursor()
    try:
        one_data = f"insert into students.student_all values (%s,%s,%s,%s,%s,%s,%s); "

        c1.execute(one_data, (id, st_uid, name, chinese, math, english, total))
        connect().commit()
        print("写入成绩成功")
    except Exception:
        print("出问题了，请检查")

#06修改学生个人信息
def edit_one_grades():
    c1 = cursor()
    st_uid = input("请输入要修改的学号:")
    sql0 = c1.execute(f'select * from students.student_data where st_uid like "%' + st_uid + '%";')
    print(c1.fetchone( ))
    name = input("请输入名字:")
    sex = input("请输入性别:")
    birthday = input("请输入生日:")
    tel = input("请输入电话(11位):")
    path = input("请输入地址:")
    remark = input("请输入简介:")
    try:
        sql = 'UPDATE students.student_data SET name="%s",sex="%s",birthday="%s",tel="%s",path="%s",remark="%s"  WHERE st_uid="%s"' % (
            name, sex, birthday, tel, path, remark, st_uid)
        rows = c1.execute(sql)
        connect().commit()
        print("修改完成")
    except Exception:
        print("出问题了，请检查")

#07.修改学生成绩信息
def edit_data_grades():
    c1 = cursor()
    st_uid = input("请输入要修改的学号:")
    sql0 = c1.execute(f'select * from students.student_all where st_uid like "%' + st_uid + '%";')
    print(c1.fetchone( ))
    name = input("请输入名字:")
    chinese = int(input("请输入语文成绩:"))
    math = int(input("请输入数学成绩:"))
    english = int(input("请输入英语成绩:"))
    total = chinese + math + english
    try:
        sql = 'UPDATE students.student_all SET name="%s",chinese="%s",math="%s",english="%s",total="%s"  WHERE st_uid="%s"' % (
            name, chinese, math, english, total, st_uid)
        rows = c1.execute(sql)
        connect().commit()
        print("修改完成")
    except Exception:
        print("出问题了，请检查")

#08.删除学生成绩信息
def remove_achievement():
    st_uid = int(input("请输入要删除的学号:"))
    c1 = cursor()
    try:
        sql = 'delete from students.student_all where st_uid="%d"' % st_uid
        c1.execute(sql)
        connect().commit( )
        print("删除成功")
    except Exception:
        print("出问题了，请检查")
#09.删除学生个人信息
def remove_one_st():
    st_uid = int(input("请输入要删除的学号:"))
    c1 = cursor()
    try:
        sql = 'delete from students.student_data where st_uid="%d"' % st_uid
        c1.execute(sql)
        connect( ).commit( )
        print("删除成功")
    except Exception:
        print("出问题了，请检查")

if __name__ == '__main__':
    print(f"""
    |---------------------------------------------------------------|
    |                   欢迎来到学生信息管理系统                         |
    |                        现在是北京时间: {time.strftime('%Y-%m-%d %H:%M:%S')}       |
    |      请选择你要操作的命令                                         |
    |      0.退出系统                                                 |
    |      1.查看所有学生成绩信息                                       |
    |      2.查看所有学生个人信息                                       |
    |      3.查看指定学生成绩信息                                       |
    |      4.添加学生个人信息                                          |
    |      5.添加学生成绩信息                                          |
    |      6.修改学生个人信息                                          |
    |      7.修改学生成绩信息                                          |
    |      8.删除学生成绩信息                                          |
    |      9.删除学生个人信息                                          |
    |_______________________________________________________________|
    """)
    while True:
        n = int(input("请输入要操作的命令:"))
        if n == 1:
            view_all()
        elif n == 2:
            data_all()
        elif n == 3:
            one_achievement()
        elif n == 4:
            add_st_data()
        elif n == 5:
            add_achievement()
        elif n == 6:
            edit_one_grades()
        elif n == 7:
            edit_data_grades()
        elif n == 8:
            remove_achievement()
        elif n == 9:
            remove_one_st()
        elif n == 0:
            m_close()
            break

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总结

一切前提条件就是需要有两张sql表，博主不建议一味的复制粘贴，有问题点击这里提问吧