Meaning of Primary Key to Microsoft SQL Server 2008

What meaning does the concept of a primary key have to the database engine of SQL Server? I don\'t mean the clustered/nonclustered index created on the \"ID\" column, i mean the constraint objec开发者

荷叶罗裙一色裁的下一句是什么啊？？

MikeSuen 2022-05-21 01:22 开发者_开发技巧采莲曲[ 唐 ]王昌龄荷叶罗裙一色裁，芙蓉向脸两边开。乱入池中看不见，闻歌始觉有人来。Luckygirl0810

How to rotate UIImageView in 3d circular way?

I m new to core animation i want to rotate an imageview left or right but i want it to be rotated in z axis so it can looks like a circular rotation.Here i开发者_JS百科s an image for more explanation

SQL*Plus : Force it to return an error code

I have a stored procedure that has an OUT parameter, indicating an error code. If the error code is not 0, then I raise an error

Linux idle event In Python

How can I determine idle time in Python on Linux, meaning no keyboard or mouse activity for the past few seconds or minutes?All开发者_运维知识库 present links tell how to do it on windows but not on L

Improving counter with animation AS3

With what I’ve got now, which which is“dynamic text” counting, how can I improve it with animation? I want “scrolling” like and odometer, and also want “ticking” like an LED.

PyObjC + Xcode 3.2 + Non-Apple Python

I want to get started trying to develop a few simple applications with PyObjC. I installed PyObjC and the Xcode templates. I know that PyObjC itself works, since I\'ve run this script successfully. Wh

Does the order of attributes have any guarantees?

If multiple attributes are applied to a member, e.g. [Foo] [Bar] void Baz() { ... } Then are any guarantees made by the CLR/.NET specifications as to what order they will be retrieved in when retri

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Inheriting properties from an abstract class, and sorting a collection on an abstact property

I am creating an invoice management application using Grails, and am experiencing problems with inheritance.