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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...
...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.object_name from v$locked_object l,dba_objects o where l.object_id=o.object_id
结果：
session_id owner object_name
158 SA TEST_1
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对比想要创建的索引，定位哪些会话需要...
How can I disable editing cells in a WPF Datagrid?
...into edit mode. I want to prevent that. Instead I want users to be able to select the full row - not edit values in it.
4 ...
How can I change Eclipse theme?
... item under
Window -> Preferences -> Appearance
Where you can select from a large range of editor themes. My preferred one to use with PyDev is Wombat. For Java Solarized Dark
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What Product Flavor does Android Studio build by default in build.gradle?
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Currently there appears to be no way to select default flavor. There is a feature request in Android Issue Tracker for it:
https://code.google.com/p/android/issues/detail?id=64917
You can star/vote the request, so it gets higher priority on Android development to...
Undoing a commit in TortoiseSVN
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Go to Show Log Screen, select the revision that you want to undo, right click it and select Revert changes from this revision, this will do a reverse-merge.
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Can I change the color of auto detected links on UITextView?
...e UITextView. It affects the link color as well as the cursor line and the selected text color.
iOS 7 also added a new property to UITextView called linkTextAttributes which would appear to let you fully control the link style.
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How to use z-index in svg elements?
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d3.selection.prototype.moveToFront = function() { return this.each(function() { this.parentNode.appendChild(this); }); }; And then you can say selection.moveToFront() via stackoverflow.com/questions/14167863/…
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How to combine class and ID in CSS selector?
...is is super old and people keep finding it: don't use the tagNames in your selectors. #content.myClass is faster than div#content.myClass because the tagName adds a filtering step that you don't need. Use tagNames in selectors only where you must!
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What is DOCTYPE?
...de), depending on the exact spelling of the DOCTYPE. You want to use it to select a browser mode that best suits your page.
Formally, in SGML and XML, a DOCTYPE declaration is a reference to a Document Type Definition (DTD), which specifies the formal syntax rules of the markup language. No browser...
What can you use Python generator functions for?
...uld like to update Alexa rank for each domain.
First thing you need is to select your domain names from the database.
Let's say your table name is domains and column name is domain.
If you use SELECT domain FROM domains it's going to return 100 million rows which is going to consume lot of memory...