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oracle表空间表分区详解(转) 此文从以下几个方面来整理关于分区表的概念及操作: 1.表空间及分区表的概念 2.表分区的具体作用 3.表分区的优缺点 4.表分区的几种类型及操作方法 5.对表分区的维护性操作. 表空间及分区表的概念 表空间：是一个或多个数据文件的集合，所有的数据对象都存放在指定的表空间中，但主要存放的是表， 所以称作表空间。 分区表：当表中的数据量不断增大，查询数据的速度就会变慢，应用程序的性能就会下降，这时就应该考虑对表进行分区。表进行分区后，逻辑上表仍然是一张完整的表，只是将表中的数据在物理上存放到多个表空间(物理文件上)，这样查询数据时，不至于每次都扫描整张表。 表分区的具体作用 Oracle的表分区功能通过改善可管理性、性能和可用性，从而为各式应用程序带来了极大的好处。通常，分区可以使某些查询以及维护操作的性能大大提高。此外,分区还可以极大简化常见的管理任务，分区是构建千兆字节数据系统或超高可用性系统的关键工具。 分区功能能够将表、索引或索引组织表进一步细分为段，这些数据库对象的段叫做分区。每个分区有自己的名称，还可以选择自己的存储特性。从数据库管理员的角度来看，一个分区后的对象具有多个段，这些段既可进行集体管理，也可单独管理，这就使数据库管理员在管理分区后的对象时有相当大的灵活性。但是，从应用程序的角度来看，分区后的表与非分区表完全相同，使用 SQL

How do you guys do maintenance on CSS built with Less/Sass? One of the things I like about Dev Tools/Firebug is the ability to see the line number of a css styling. Is there a good way to do this with CSS preprocessors other than having to manually search through the .less/.scss file to find the code I want to modify? Chrome Developer Tools now supports Sass debugging out-of-the-box. Updated to include source maps: Previous versions used inline comment in your css to provide a refernce to the source code (see below how-to). recent versions of sass (3.3+) and chrome (31+) use source maps for

I've run into some difficulty trying to play a CSS3 keyframe animation and have the relevant element stick at the last frame after the animation has completed. To my understanding, the property that I have to set for this to work should be animation-fill-mode, which should have the value of forwards; this doesn't do anything. .animatedSprite { .animation-name: sprite; .animation-duration: .5s; .animation-iteration-count: 1; .animation-direction: normal; .animation-timing-function: steps(3); .animation-fill-mode: forwards; //Vendor prefixes... } This will just play the animation once and then

I have the following code: @color : #d14836; .stripes span { -webkit-background-size: 30px 30px; -moz-background-size: 30px 30px; background-size: 30px 30px; background-image: -webkit-gradient(linear, left top, right bottom, color-stop(.25, rgba(209, 72, 54, 1)), color-stop(.25, transparent), color-stop(.5, transparent), color-stop(.5, rgba(209, 72, 54, 1)), color-stop(.75, rgba(209, 72, 54, 1)), color-stop(.75, transparent), to(transparent)); I need to convert @color to rgba(209, 72, 54, 1) . So I need to replace rgba(209, 72, 54, 1) in my code with a Less function that generates an rgba()

It would be nice to wrap css-styles for different resolutions within some css-classes using less. I'd like to do something like: footer { width: 100%; } .tablet { footer { width: 768px; } } .desktop { footer { width: 940px; } } At the end something like this should be the result: footer { width: 100%; } @media screen and (min-width: 768px) { footer { width: 768px; } } @media screen and (min-width: 992px) { footer { width: 940px; } } .tablet could look somehow like this: @media screen and (min-width: 768px) { .tablet { } } Hope somebody has a nice idea! Here is what I've done in my projects: