事实证明，在Linux下是否检查内存分配是否返回一个引用并不重要，因为它实际上会欺骗你，在未来的某个时候实际分配内存，或者如果它没有你需要的内存，就完全终止你的程序。

标识列不能包含重复值: Sql server中的identity列

不熟悉SQL和关系数据库的过程开发人员/程序员不需要任何正式的培训，也不需要了解如何使用SQL，快速阅读SQL For Dummies之类的东西就足以使用像Oracle和SQL Server这样的关系数据库。

在处理存储在关系数据库(如Oracle和SQL Server)中的数据的应用程序中，许多错误往往是由于缺乏对关系数据库语言的理解或如何使用造成的;SQL。

I used to work for a software vendor who had the mentality that all a developer needed was the SQL For Dummies book or something similiar and they would be fully equipped to handle any relational database issue. Now that the clients of this vendor have databases measuring in hundreds of gigabytes this lack of SQL knowledge is coming back around in a negative way. It's not just bad performing lookups and or updates and inserts that are a problem but the actual design of the database itself that is the real obstacle.

如果当时开发主管能够像对待他们构建应用程序所用的语言那样对待SQL和关系数据库，那么所有这些都是可以避免的，而且成本也会低得多。

不要认为SQL不重要，因为它最终会回来困扰你。你可能可以在一段时间内摆脱它，甚至几年，但你最终会达到一个断点，在没有完全重新设计数据库的情况下，你无法继续前进，那是成本最高的时候。

我一直认为，任何为任何语言编写任何代码的人都会使用编辑程序。

I was working with a client of mine who had me on mostly as support and to write some of the more complex things for him. Well one day he messed up a file, big time. He accidentally saved over three hours worth of his own work, and when I asked him why he didn't save more often he replied with, "because I wasn't done". Naturally, this was not an acceptable answer, and I poked and prodded a little further. I eventually came to find out that he he has never used any editing program, EVER! Not even notepad.exe! He had been using an online CPanel editor for files! It didn't even have a 'Find' function. He couldn't ever save until he was done because he was editing the live file on the site!

不用说，我很惊讶，他至今仍在使用CPanel编辑器……

你可以在它的构造函数中memset(this, 0, sizeof(TheObject))一个c++对象而没有负面的结果

理解指针和递归是非常困难的。

VB6中的Integers与。net大小不同。

VB6可以进行位级操作。

专业程序员制作没有bug的软件。