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PHP编译安装时常见错误解决办法，php编译常见错误 - 更多技术 - 清泛网 - ...
...lude/curl/
代码如下:
yum -y install libcurl-devel
LAOGAO added 20140907：
configure: error: mcrypt.h not found. Please reinstall libmcrypt.
代码如下:
wget ftp://mcrypt.hellug.gr/pub/crypto/mcrypt/libmcrypt/libmcrypt-2.5.7.tar.gz
tar zxf libmcrypt-2.5.7.tar.gz
cd libmcrypt-2.5.7
....
How do I check OS with a preprocessor directive?
... with links to where they're found:
Windows
_WIN32 Both 32 bit and 64 bit
_WIN64 64 bit only
Unix (Linux, *BSD, Mac OS X)
See this related question on some of the pitfalls of using this check.
unix
__unix
__unix__
Mac OS X
__APPLE__
__MACH__
Both are defined; checking for either sh...
How do I get epoch time in C#? [duplicate]
...itrov
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How to convert integer to string in C? [duplicate]
...its for int. When using numbers with greater bitsize, e.g. long with most 64-bit compilers, you need to increase the array size—at least 21 characters for 64-bit types.
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Why am I getting “undefined reference to sqrt” error even though I include math.h header? [duplicate
...
AbhijitAbhijit
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add a c...
nvarchar和varchar相互转换、联合查询 - ORACLE - 清泛IT论坛，有思想、有深度
本帖最后由 zqp2013 于 2015-2-27 16:42 编辑
场景：联合查询（union all）Oracle两张表，同一组字段的数据类型不一致，分别是nvarchar和varchar。
这时联合查询报错如下：ora12704：字符集不匹配。
解决方法：需要对数据类型进行转换...
What is better, adjacency lists or adjacency matrices for graph problems in C++?
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rrlamichhane
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answered Feb 7 '10 at 21:03
Mark ByersMark Byers
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ORA-00979 not a group by expression
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You must put all columns of the SELECT in the GROUP BY or use functions on them which compress t...
Difference between VARCHAR and TEXT in MySQL [duplicate]
...EXT, but be careful: MEDIUMTEXT stores strings up to 16 MB, LONGTEXT up to 4 GB. If you use LONGTEXT and get the data via PHP (at least if you use mysqli without store_result), you maybe get a memory allocation error, because PHP tries to allocate 4 GB of memory to be sure the whole string can be bu...
Functions that return a function
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answered Oct 2 '11 at 23:44
kzhkzh
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