29.You executed the following command to perform a backup of the USERS tablespace:SQL> ALTER TABLESPACE users BEGIN BACKUP;ALTER TABLESPACE users BEGIN BACKUP*ERROR at line 1:ORA-01123: cannot start online backup; media recovery not enabledWhat could…

131. Which three methods can you use to run an Automatic Database Diagnostic Monitor (ADDM) analysis over a specific time period? (Choosethree.)A. Enterprise Manager GUIB. DBMS_TRACE package APIsC. DBMS_ADVISOR package APIsD. DBMS_MONITOR package API…

1.You observe that a database performance has degraded overa period of time. While investigating the reason, you find the size ofthe database buffer cache is not large enough to cache all the needed datablocks. Which advisory component wold you refer…

601.You need to perform a block media recovery on the tools01.dbf data file in the SALES database byusing Recovery Manager (RMAN).Which two are the prerequisites to perform this operation? (Choose two)A. You must configure block change tracking fileB…

命令简介 WPF 中的命令是通过实现 ICommand 接口创建的.ICommand 公开两个方法(Execute 及 CanExecute)和一个事件(CanExecuteChanged).Execute 执行与命令关联的操作.CanExecute 确定是否可以在当前命令目标上执行命令.如果集中管理命令操作的命令管理器检测到命令源中发生了更改,此更改可能使得已引发但尚未由命令绑定执行的命令无效,则将引发 CanExecuteChanged.ICommand 的 WPF 实现是 RoutedCo…

I passionately enjoy working with commands as they offer more control over a Linux system than GUIs(Graphical User Interfaces) applications, therefore am always on the look out to discover or figure out interesting ways and ideas to make Linux so eas…

Quote from: http://pcsupport.about.com/od/commandlinereference/p/xcopy-command.htm The xcopy command is a Command Prompt command used to copy one or more files and/or folders from one location to another location. The xcopy command is also a DOS comm…

命令简介 WPF 中的命令是通过实现 ICommand 接口创建的.ICommand 公开两个方法(Execute 及 CanExecute)和一个事件(CanExecuteChanged).Execute 执行与命令关联的操作.CanExecute 确定是否可以在当前命令目标上执行命令.如果集中管理命令操作的命令管理器检测到命令源中发生了更改,此更改可能使得已引发但尚未由命令绑定执行的命令无效,则将引发 CanExecuteChanged.ICommand 的 WPF 实现是 RoutedCo…

When you are using Linux command line frequently, using the history effectively can be a major productivity boost. In fact, once you have mastered the 15 examples that I’ve provided here, you’ll find using command line more enjoyable and fun. 1. Disp…

How to remove the return code from the terminal prompt In addition to the PS1 environment variable, the PROMPT_COMMAND environment variable also affects your prompt. From the bash man page: If set, the value is executed as a command prior to issuing…