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How to remove not null constraint in sql server using query
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Reference: https://www.tutorialspoint.com/How-can-we-remove-NOT-NULL-constraint-from-a-column-of-an-existing-MySQL-table
ALTER TABLE tableName MODIFY columnName columnType NULL;
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how to change color of textview hyperlink?
...find it documented anywhere, it isn't on the Google Color Palatte anyway:
https://www.google.com/design/spec/style/color.html#color-color-palette
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GUI Tool for PostgreSQL [closed]
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There is a comprehensive list of tools on the PostgreSQL Wiki:
https://wiki.postgresql.org/wiki/PostgreSQL_Clients
And of course PostgreSQL itself comes with pgAdmin, a GUI tool for accessing Postgres databases.
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MFC SysLink的使用方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...MLINK pNMLink = (PNMLINK) pNMHDR;
if (wcscmp(pNMLink->item.szUrl, L"https://www.tsingfun.com") == 0)
{
// 主要执行语句
ShellExecuteW(NULL, L"open", pNMLink->item.szUrl, NULL, NULL, SW_SHOWNORMAL);
}
*pResult = 0;
}
MFC SysLink
C++字符串截断时中文的处理问题(中文被截断怎么处理?) - C/C++ - 清泛网...
...的第一个字节,否则是普通的ASCII字符。
具体请参考:https://www.tsingfun.com/it/cpp/1335.html
当然,还有其他方式就是判断 > 127 或 < 0(即首bit为1,signed时值为负),道理也是一样,不过推荐上面的写法。C++ 字符串 中文截断
CreateWindow()动态创建一个EditBox - C/C++ - 清泛网 - 专注C/C++及内核技术
...输入的内容。
另外,如何设置输入框焦点,请参照:https://www.tsingfun.com/it/cpp/1538.htmlCreateWindow 动态创建 EditBox
mfc spin control 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...中设置Spin的属性,实现控制Edit控件数字的增减,详见:https://www.tsingfun.com/it/cpp/1564.html。mfc spin
一款IP:端口监控工具 服务器端口监控工具[附源码] - C/C++ - 清泛网 - 专注...
...警(PC蜂鸣器、自定义wav文件)。
软件下载:https://www.tsingfun.com/down/soft/74.html
源码下载:TradeMonitor.zip
主要代码请参考:《mfc telnet 端口,代码实现、不调用telnet.exe》
表格采用GridCtrl(Demo源码):《MFC Grid control 2...
c++文件流基本用法(ifstream, ostream,fstream) - C/C++ - 清泛网 - 专注C/C++及内核技术
...们也可以调用read函数和write函数来读写文件。可参见:
https://www.tsingfun.com/it/cpp/all_programming_language_file_read_write_summary.html#C
c++ ,文件流,ifstream, ostream,fstream
c/c++如何获取CPU的序列号? - C/C++ - 清泛网 - 专注C/C++及内核技术
...信息,另一组返回的是扩展信息。
继续了解请参考:https://www.tsingfun.com/it/cpp/1965.html
运行结果:
CPU 序列号 cpuid
