Question

使用 sqlite3 从表中取回数据并根据条件返回#results的函数仅返回零。通过Visual Studio运行#function会带来预期的结果，但是＃当我尝试从终端运行它时，它将表解释为空列表。

import sqlite3

con = sqlite3.connect('test2.db')
cur = con.cursor()

小表来说明问题。表格输出为[('Jane', 300.0), ('Joe', 100.0), ('Joe', 50.0)]

total_bal = """SELECT name, amount FROM customers2"""

user_name = input("What is your name? ")

def account_balance(name):
    cur.execute(total_bal)
    table = cur.execute(total_bal)
    total = 0
    name = user_name
    for t in table:

        if t[0] == name:
            total += t[1]            
    return total
print(account_balance(user_name))

期望返回150 if user_name input = 'Joe' or 300 if 'Jane'

Answer 1

实际上，您可以对查询执行此操作，并且完全避免使用帐户余额功能。

statement = "SELECT name, account FROM customers2 WHERE name = ?;"
name = input("Enter your name: ")
cur.execute(statement, (str(name),))
results = cur.fetchone()
if results:
   print(f"Name: {results[0]}\nAccount Balance: {results[1]}"
else:
   print("Your name is not in the database")

sqlite3查询未在函数中返回结果

1 个答案: