python基于mysql数据库实现无页面学生信息管理系统以及简单操作mysql
- 前言
- 一、分步讲解
- 0.创建两张数据表
- 1.大概思路
- 2.首先连接数据库
- 3.查看所有学生成绩信息
- 4.查看所有学生个人信息
- 5.查看指定学生成绩信息
- 6.添加学生个人信息
- 7.添加学生成绩信息
- 8.修改学生个人信息
- 9.修改学生成绩信息
- 10.删除学生成绩信息
- 11.删除学生个人信息
- 二.完整系统代码
- 总结
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。
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))
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))
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)
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)
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))
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))
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)
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)
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
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