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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C++内核技术
...持多源码文件编译运行 7次浏览 4eclipse git插件设置代理 6次浏览 5prism 怎么加入行号？ 6次浏览 6【解决】cannot load such f... 5次浏览 7CMake 编译libcurl 5次浏览 ...
MySQL: Order by field size/length
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SELECT * FROM TEST ORDER BY LENGTH(description) DESC;
The LENGTH function gives the length of string in bytes. If you want to count (multi-byte) characters, use the CHAR_LENGTH function instead:
SELECT * FROM TEST ORDER BY...
How to split a comma-separated value to columns
...TRING(@string, @pos, @len)
INSERT INTO @out_put ([value])
SELECT LTRIM(RTRIM(@value)) AS [column]
SET @pos = CHARINDEX(@delimiter, @string, @pos + @len) + 1
END
RETURN
END
share
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Building an MFC project for a non-Unicode character set is deprecated ...
...MBCS) 的 MFC 库 (DLL) 不再包含于 Visual Studio 中，但是可用作插件，您可以在任何装有 Visual Studio Professional、Visual Studio Premium 或 Visual Studio Ultimate 的计算机上下载和安装。（在 Visual Studio 中，必须启用 MFC。）安装需要大约 440 MB 磁...
MySQL - length() vs char_length()
... in two bytes. Or UTF-8, where the number of bytes varies. For example:
select length(_utf8 '€'), char_length(_utf8 '€')
--> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC in UTF-8) even though it's only one character.
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How to use GROUP BY to concatenate strings in SQL Server?
...S (1,'B',8)
INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (2,'C',9)
SELECT
[ID],
STUFF((
SELECT ', ' + [Name] + ':' + CAST([Value] AS VARCHAR(MAX))
FROM #YourTable
WHERE (ID = Results.ID)
FOR XML PATH(''),TYPE).value('(./text())[1]','VARCHAR(MAX)')
,1,2,'') AS NameVa...
Java: notify() vs. notifyAll() all over again
...and the difference between these methods right), only one thread is always selected for further monitor acquisition.
That is not correct. o.notifyAll() wakes all of the threads that are blocked in o.wait() calls. The threads are only allowed to return from o.wait() one-by-one, but they each will...
How do I specify a pointer to an overloaded function?
...putIterator, InputIterator, UnaryFunction );
Template deduction needs to select a type for UnaryFunction at the point of the call. But f doesn't have a specific type - it's an overloaded function, there are many fs each with different types. There is no current way for for_each to aid the template...
MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
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pt-table-checksum校验数据一致性。
从库mysql操作
GRANT SELECT,PROCESS, SUPER, REPLICATION SLAVE ON *.* TO 'checksums'@'192.168.1.100' IDENTIFIED BY 'slavecheck'; flush privileges;
主库mysql操作
GRANT SELECT, PROCESS, SUPER, REPLICATION SLAVE ON *.* TO 'checksums'@'19...
C#: how to get first char of a string?
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Select the oldest tab to see that it as Matthew
– johnc
Oct 7 '10 at 5:10
11
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