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Oracle入门教程之SCN浅析

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Release： 2016-06-07 17:11:44
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Oracle入门教程之SCN浅析，当一个检查点动作完成以后，Oracle就把系统检查点的SCN存储到控制文件中，当一个检查点动作完成以后，

我们重点讨论几个SCN

控制文件中的SCN

1、系统检查点SCN

当一个检查点动作完成以后，Oracle就把系统检查点的SCN存储到控制文件中

Oracle入门教程之SCN浅析

2、数据文件检查点SCN

当一个检查点动作完成以后，Oracle就把每一个数据文件的SCN单独存放在控制文件中

Oracle入门教程之SCN浅析

1、为了显示，首先看一下DESC，确定每一个列的大小

2、设置linesize，，保证一行中能够容纳所有的列

当然也要考虑实际的大小

同时还可以设置pagesize的大小

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