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SQL中使用update inner join和delete inner join；Oracle delete join替代...
...here and table1.khid=table2.khid and FWDWID=8);
Oracle的delete与join如何使用
delete from A where sid in
(select a.sid from A a inner join B b on a.num2 = b.num1
where b.num2 not between '10'and '10000') 这段sql如何优化，不使用in？
1. 用exists 来替代 in
delete fr...
What is HTML5 ARIA?
...
ARIA stands for Accessible Rich Internet Applications.
WAI-ARIA is an incredibly powerful technology that allows developers to easily describe the purpose, state and other functionality of visually rich user interfaces - in a way that can be understood ...
Programmatically find the number of cores on a machine
...dent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)?
19 Answers
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Why do Chrome and IE put “Mozilla 5.0” in the User-Agent they send to the server? [duplicate]
...ked from getting content they can support. From the above article:
And Internet Explorer supported frames, and yet was not Mozilla, and so was not given frames. And Microsoft grew impatient, and did not wish to wait for webmasters to learn of IE and begin to send it frames, and so Internet Explo...
Quick and easy file dialog in Python?
... only the dialog without any other GUI elements, you have to hide the root window using the withdraw method:
import tkinter as tk
from tkinter import filedialog
root = tk.Tk()
root.withdraw()
file_path = filedialog.askopenfilename()
Python 2 variant:
import Tkinter, tkFileDialog
root = Tkinte...
Modifying the “Path to executable” of a windows service
...onfig SUCCESS
SERVICE_NAME: ServiceName
TYPE : 10 WIN32_OWN_PROCESS
START_TYPE : 2 AUTO_START
ERROR_CONTROL : 1 NORMAL
BINARY_PATH_NAME : C:\Services\ServiceName
LOAD_ORDER_GROUP :
TAG : 0
DISPLAY_NAME : <D...
Worst security hole you've seen? [closed]
...url%3A%2520+inurl%3Afrom+inurl%3Awhere
It's amazing how many pages on the Internet, government sites in particular, pass an SQL query through the query string. It's the worst form of SQL injection, and it takes no effort at all to find vulnerable sites.
With minor tweaks, I've been able to find un...
那些年 和360分道扬镳的小伙伴们 - 资讯 - 清泛网 - 专注C/C++及内核技术
...此之前，备受争议的360还曾和哪些企业合作过，结果又是如何的呢？360和酷派分手看来已经不可避免。在此之前，备受争议的360还曾和哪些企业合作过，结果又是如何的呢？
91无线
在百度以18.5亿美元投资91之前，360曾和91结成...
PHP 错误记录和聚合的平台Sentry实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...和聚合的平台Sentry实战不管你用什么编程语言，都会面临如何处理错误日志的问题。很多程序员对错误日志放任自流，直到出现故障了才追悔莫及，如果问我怎么办，我会...不管你用什么编程语言，都会面临如何处理错误日志的...
优惠券批量生成及导入的思路 - 闲聊区 - 清泛IT论坛，有思想、有深度
...个事实。假设我们可以随机生成不重复的整数，那么又该如何转换成上述”字母+数字”的混合字符串形势呢？答案是：36进制。36进制数的表达区间是0-9，A-Z(a-z)，恰好满足要求。因此，我的方法是用随机函数生成长整形并转换...