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解决:ORA-00054:资源正忙,要求指定NOWAIT - 数据库(内核) - 清泛网 - 专注...

...数据库 原理分析: 1:创建索引时会产生的锁 2:dml 语句会产生的锁 3:索引创建时加上关键字 online时产生的锁 找出占用资源的会话,并删除 1:找出所有被锁的对象,定位出哪个回话占用 select l.session_id,o.owner,o...
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CentOS系统下如何挂载第2块磁盘 - 更多技术 - 清泛网 - 专注C/C++及内核技术

CentOS系统下如何挂载第2块磁盘1、查看新硬盘 # fdisk -l新添加的硬盘的编号为 dev sdb 2、硬盘分区 1)进入fdisk模式 # fdisk dev sdb2)输入n进行分区...1、查看新硬盘 # fdisk -l 新添加的硬盘的编号为/dev/sdb 2、硬盘分区 ...
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Simplest way to detect a mobile device in PHP

... answered Jan 30 '17 at 20:05 user3126867user3126867 42044 silver badges66 bronze badges ...
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Where do I find the line number in the Xcode editor?

In Xcode 3, the line number of the current cursor location was displayed. I don't see this in Xcode 4. Is there a setting that will turn it on? Or a keypress that will give it to me? ...
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Removing first x characters from string?

How might one remove the first x characters from a string? For example, if one had a string lipsum , how would they remove the first 3 characters and get a result of sum ? ...
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Has anyone ever got a remote JMX JConsole to work?

It seems that I've never got this to work in the past. Currently, I KNOW it doesn't work. 20 Answers ...
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input() error - NameError: name '…' is not defined

I am getting an error when I try to run this simple script: 14 Answers 14 ...
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Are there any reasons to use private properties in C#?

... answered Jul 22 '10 at 15:05 Shaun BoweShaun Bowe 8,7221111 gold badges4545 silver badges6969 bronze badges ...
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How to stop a PowerShell script on the first error?

... $ErrorActionPreference = "Stop" will get you part of the way there (i.e. this works great for cmdlets). However for EXEs you're going to need to check $LastExitCode yourself after every exe invocation and determine whether th...
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MySQL Workbench: How to keep the connection alive

Error Code: 2013. Lost connection to MySQL server during query 9 Answers 9 ...