以學生的信息進行舉例
sqlite3界面如下
查 select
def select_student():
"""
查詢學員信息的函數
:return: None
"""
# for index, info_list in enumerate(all_stu_list):
# print(index + 1, '.', info_list[0], info_list[1])
conn = sqlite3.connect('student.db')
cursor = conn.cursor()
cursor.execute('select * from stu')
res = cursor.fetchall()
for line in res:
# or f in line:
print(line)
print('\n學員信息查詢完成\n')
cursor.close()
conn.close()
查詢結果
增加信息add
def add_student(sname, sage):
"""
該函數是用於添加學員信息的函數
:return: None
"""
# sname = input('輸入學員姓名:')
# age = int(input('輸入學員年齡:'))
conn = sqlite3.connect('student.db')
cursor = conn.cursor()
cursor.execute("insert into stu(name ,age)"
"values ('%s', '%s')"%(sname, sage))
conn.commit()
# s_list = [s_name, s_age]
# all_stu_list.append(s_list)
print('\n學員信息添加完成\n')
cursor.close()
conn.close()
insert 語句需要注意寫法,我查了30分鐘,唉,使用佔位符
刪除delete
def delete_student():
"""
刪除學員信息函數
:return:
"""
conn = sqlite3.connect('student.db')
cursor = conn.cursor()
print('''
1-根據序號刪除學員信息
2-根據學院名稱刪除學員信息
3-刪除所有學員信息
''')
number = int(input('請選擇操作:'))
while number < 1 or number > 3:
number = input('請重新選擇操作:')
if number == 1:
select_student()
num = int(input('請輸入刪除的學員編號:'))
# all_stu_list.pop(num - 1)
cursor.execute("delete from stu where id = %s" % num)
conn.commit()
print('\n數據刪除成功\n')
elif number == 2:
select_student()
sname = input('請輸入刪除的學員姓名:')
cursor.execute("DELETE FROM stu WHERE name = '%s' " %sname)
conn.commit()
# for index, info_list in enumerate(all_stu_list):
# # 判斷輸入的name的值,在info_list列表中是否存,如果存在,將這個小列表info_list刪除,反之,不刪除。
# if sname in info_list:
#
# conn.commit()
print('\n數據刪除成功\n')
# else:
# # print('沒有這個學員')
# pass
elif number == 3:
cursor.execute('DELETE FROM stu')
conn.commit()
# all_stu_list.clear()
# while len(all_stu_list):
# del all_stu_list[0]
cursor.close()
conn.close()
親測無錯
修改信息:update
def update_student():
"""
修改學員信息的函數
:return:
"""
conn = sqlite3.connect('student.db')
cursor = conn.cursor()
number = int(input('請輸入修改學員的編號:'))
# 在修改學員信息之前,先查詢所有學員信息,方便選擇學員
select_student()
# while number < 1 or number > len(all_stu_list):
# number = int(input('沒有該學員,請重新輸入修改學員的編號:'))
# 根據輸入的編號轉化成索引值,將學員對應的小列表獲取出來
# info_list = all_stu_list[number - 1]
re_name = input('請輸入新的姓名: ')
re_age = input('請輸入新的年齡(%s): ')
re_age = int(re_age)
cursor.execute("update stu set name = '%s', age = '%s' where id = '%s'"
%(re_name, re_age, number))
conn.commit()
# info_list[0] = re_name
# info_list[1] = re_age
print('\n學員信息修改完成\n')
持續更新。。。。。。