无法在python中获取SQLite数据库

Question

1）我是python新手，正在使用SQLITE数据库。设置连接时，我无法获取数据库（我已经在SQLite和表中创建过数据库）

2）在执行插入查询时，出现以下错误：“ sqlite3.OperationalError：没有这样的表：MemberDetails”

这里是代码：

import sqlite3
my_cursor = ""
conn = ""


# setting the connection with database
# def con_database_connection():
# try:
globals()
conn = sqlite3.connect('CareForNation.db')
# new_con = sqlite3.connect('CareForNation.db')
print("connection established successfully")
my_cursor = conn.cursor()
# except sqlite3 as error
# print("Connection failed")


# Login Admin Control
user_name = input("Enter user name")
user_password = input("Enter Password")
if user_name == "123" and user_password == "123":
    print("Login successful")
else:
    print("Invalid user name or password")


# Inserting member information
# con_database_connection()
mid = input("Enter Member ID")
member_name = input("Enter member name")
member_phone_number = input("enter phone number")
member_address = input("Enter address")

insert_data = my_cursor.execute("insert into MemberDetails(Member_ID, Member_Name, Phone_Number, address) "
                                "values('mid', 'member_name', 'member_phone_number', member_address)")

# abc = conn.executescript("select * from MemberDetails")

print("New data entered to Member details module")
conn.close()

Answer 1

[[更新]

我已经对您的代码进行了一些更改，现在可以正常使用！

import sqlite3
my_cursor = ""
conn = ""


# setting the connection with database
# def con_database_connection():
# try:
globals()
conn = sqlite3.connect('CareForNation.db')
# new_con = sqlite3.connect('CareForNation.db')
print("connection established successfully")
my_cursor = conn.cursor()
# except sqlite3 as error
# print("Connection failed")


# Login Admin Control
user_name = input("Enter user name")
user_password = input("Enter Password")
if user_name == "123" and user_password == "123":
    print("Login successful")
else:
    print("Invalid user name or password")


# Inserting member information
# con_database_connection()
mid = input("Enter Member ID")
member_name = input("Enter member name")
member_phone_number = input("enter phone number")
member_address = input("Enter address")

my_cursor.execute("create table if not exists MemberDetails(Member_ID, Member_Name, Phone_Number, address)")
insert_data = my_cursor.execute("insert into MemberDetails (Member_ID, Member_Name, Phone_Number, address) values (?, ?, ?, ?)", (mid, member_name, member_phone_number, member_address))
# abc = conn.executescript("select * from MemberDetails")

print("New data entered to Member details module")
conn.close()
~             

Answer 2

首先创建表：

my_cursor.execute("""CREATE TABLE MemberDetails(
            mid text,
            member_name text,
            member_phone_number text,
            member_address text
            )""")

然后，替换

insert_data = my_cursor.execute("insert into MemberDetails(Member_ID, Member_Name, Phone_Number, address)"
                                "values('mid', 'member_name', 'member_phone_number', member_address)"
                                )

使用：

with conn:
    my_cursor.execute("INSERT INTO MemberDetails VALUES (:mid, :member_name, :member_phone_number, :member_address)",
                      {'mid': mid, 'member_name': member_name, 'member_phone_number': member_phone_number, 'member_address': member_address})