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Chapter 3 Protecting the Data(2):分配列级权限
SQL Server的权限是有层次的,一个用户有架构级别的权限,就有了架构内部所有对象的权限,除非使用了DENY权限单独移除。但是对象并不是层次中的最低级,可以把权限设置到列级别。但是列级权限会覆盖掉表上被GRANT的权限。...
分类:其他好文   时间:2014-09-26 14:02:39    阅读次数:164
Chapter 16 Auto layout: Programmatic Constraints
Chapter 16 Auto layout: Programmatic Constraints1. The line of code regarding translating constraints has to do with an older system for scaling inter...
分类:其他好文   时间:2014-09-25 19:18:37    阅读次数:332
Chapter 3 Protecting the Data(1):理解权限
关系型数据库管理系统(RDBMS),如SQL Server、Oracle、Mysql等,不仅仅需要负责存取数据,也要负责确保数据的一致性和安全性。类似于其他服务器系统,通过授权给一个用户并维护这个用户的会话来控制数据的访问行为。每当尝试读写数据时,SQL Server都会检查这些权限。...
分类:其他好文   时间:2014-09-25 12:31:28    阅读次数:282
Chapter 15 Introduction to Auto Layout
Chapter 15 Introduction to Auto Layout1. You do not define a view’s alignment rectangle directly. You do not have enough information (screen size!)to ...
分类:其他好文   时间:2014-09-24 21:38:47    阅读次数:180
[Learning You a Haskell for Great Goods!] chapter 01 starting out
Installationunder CentOS/Fedora# yum install ghcVersion[root@bogon1 haskell]# ghc -vGlasgow Haskell Compiler, Version 7.0.4, for Haskell 98, stage 2 b...
分类:其他好文   时间:2014-09-24 02:36:05    阅读次数:208
Chapter 13 UIGestureRecognizer and UIMenuController
Chapter 13 UIGestureRecognizer and UIMenuController1. A UIGestureRecognizer intercepts touches that are on their way to being handled by a view. When ...
分类:其他好文   时间:2014-09-24 00:57:45    阅读次数:311
Chapter 2 User Authentication, Authorization, and Security(11):在已还原的数据库中修正登录映射错误
如果你把非包含数据库从一个服务器移到另外一个服务器,不管是备份还原还是分离附加,都有可能导致SQL用户变成孤立用户,意味着他们没有对应的登录关联。因为登录名和用户之间的映射是基于SID的,即使新服务器上有相同的登录名,但是由于SID不同,也会使得用户无法被识别,从而形成孤立用户。 如果在同一个域中迁移,那么映射问题仅会影响SQL登录,因为域账号(Windows身份验证)的SID在活动目录中是相同的。...
分类:数据库   时间:2014-09-23 15:21:04    阅读次数:201
Chapter 12 Touch Events and UIResponder
Chapter 12 Touch Events and UIResponder1.As a subclass of UIResponder, a UIView can override four methods to handle the distinct touch events: a finge...
分类:其他好文   时间:2014-09-23 01:12:03    阅读次数:344
divide-conquer-combine(4.1 from the introduction to algorithm)
this example is from chapter 4 in 《the introduction to algorithm》the main idea is all showed in the book , i think maybe realizing the algorithm is a ...
分类:其他好文   时间:2014-09-22 22:40:33    阅读次数:173
Chapter 4 Objects and Classes
1. Introduction to Object-Oriented Programming(面向对象编程)2. using Predefined Classes3. Defined Your Own Classes4. Static Fileds and Methods5. Method Para...
分类:其他好文   时间:2014-09-22 15:22:52    阅读次数:230
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