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创建增量同步Oracle物化视图问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...如果将此表的主键增加字段并ENABLE后操作，又说：“ORA-23412: 主表的主键列已更改”。
但有一个奇怪的现象：在数据库B上我们也建立过物化视图，它却在此表的主键disable之后，还是正常运行。
我们介绍一下在数据库B上的创...
Character reading from file in Python
...e next closest ASCII equivalent (Ref https://web.archive.org/web/20090228203858/http://techxplorer.com/2006/07/18/converting-unicode-to-ascii-using-python):
>>> teststr
u'I don\xe2\x80\x98t like this'
>>> unicodedata.normalize('NFKD', teststr).encode('ascii', 'ignore')
'I donat l...
Convert Linq Query Result to Dictionary
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community wiki
3 revs, 3 users 72%tvanfosson
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Equivalent of Math.Min & Math.Max for Dates?
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answered Dec 31 '09 at 13:27
GuffaGuffa
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What does a type followed by _t (underscore-t) represent?
...extra types, such as uintptr_t, intmax_t, int8_t, uint_least16_t, uint_fast32_t, and so on. These new types are formally defined in <stdint.h> but most often you will use <inttypes.h> which (unusually for standard C headers) includes <stdint.h>. It (<inttypes.h>) also defin...
What exactly is an “open generic type” in .NET? [duplicate]
... this snippet, it'll print out
System.Collections.Generic.List`1[System.Int32]
which is the CLR name for List<int>. It's clear at runtime that the type argument is System.Int32. This makes List<T> a bound open type.
At runtime, you can use reflection to bind type arguments to unspecifie...
How to remove a single, specific object from a ConcurrentBag?
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Mark ByersMark Byers
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What's the difference between IEquatable and just overriding Object.Equals()?
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openshac
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answered Apr 29 '10 at 5:20
JoshJosh
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Using LIMIT within GROUP BY to get N results per group?
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How to check if IEnumerable is null or empty?
... Marc Gravell♦Marc Gravell
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