Question

我在MySQL中创建了一个程序。此过程可以像以下一样使用：

IF USERNAME CONTAINS "XXX" THEN REJECT ADD TO THE DATABASE

可以做这样的程序吗？

Answer 1

我更喜欢一种替代方法（因为您不必执行SELECT或设置其他变量，而是使用LOCATE()函数。

IF (LOCATE(@username,'xxx') > 0) THEN
{reject this username as xxx was found}
END IF;

Answer 2

import tkinter as tk
import queue
import threading
import time

def button_pressed():
    threading.Thread(target=do_something_on_a_thread).start()

def do_something_on_a_thread():
    global new_window
    app_queue.put(create_a_new_window)
    time.sleep(1)
    app_queue.put(new_window.destroy)

def create_a_new_window():
    global new_window
    new_window = tk.Toplevel()
    tk.Label(new_window, text='Temporary Window').grid()

#Check queue and run any function that happens to be in the queue
def check_queue():
    while not app_queue.empty():
        queue_item = app_queue.get()
        queue_item()
    app.after(100, check_queue)

#Create tkinter app with queue that is checked regularly
app_queue = queue.Queue()
app = tk.Tk()
tk.Button(app, text='Press Me', command=button_pressed).grid()
create_a_new_window()
new_window.destroy()
app.after(100, check_queue)
tk.mainloop()

MYSQL创建PROCEDURE（如果字符串包含则拒绝添加）

2 个答案: