我正在使用 MySQL C 连接器在 Visual C++ 中编写。
当我 StringCchPrintf 这个查询并执行并获得结果时，就可以了。
SELECT orders.id,
orders.get_date,
orders.work_date,
cars.car_num,
cars.car_mark,
customers.surname,
customers.name,
customers.telephone,
workers.login,
orders.paid,
orders.paid_dead_line
FROM `orders`, `cars`, `customers`, `workers`
WHERE cars.customer_id = customers.id AND
orders.car_id = cars.id AND
orders.customer_id = customers.id AND
orders.worker_id = workers.id AND
DATE(get_date) LIKE DATE('%d-%d-%d')
ORDER BY get_date ASC;
当我 StringCchPrintf 下面的查询 - 程序没有调用免费函数 [1] 并且当我再次按下按钮时，我的应用程序崩溃了。
SELECT orders.id,
orders.get_date,
orders.work_date,
cars.car_num,
cars.car_mark,
customers.surname,
customers.name,
customers.telephone,
workers.login,
orders.paid,
orders.paid_dead_line
FROM `orders`, `cars`, `customers`, `workers`
WHERE orders.paid IN ('0', '2', '3') AND //1 == paid
cars.customer_id = customers.id AND
orders.car_id = cars.id AND
orders.customer_id = customers.id AND
orders.worker_id = workers.id
ORDER BY get_date ASC;
[1] 我把 MessageBox 放在之后while ((row = mysql_fetch_row(result)))并且没有显示消息框，所以没有调用清理函数并且在第二个按钮推送程序崩溃。从数据库中获取数据并显示在单独的 void 函数中。
我的问题：
错误的查询语法会导致程序崩溃？
也许程序在清理之前会退出 void 功能（奇怪）？
问候，大卫