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How to remove not null constraint in sql server using query

... 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 share | improve this answer | ...
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GUI Tool for PostgreSQL [closed]

... 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. ...
https://www.tsingfun.com/it/cpp/1469.html 

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
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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
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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
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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
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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...
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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
https://www.tsingfun.com/it/cpp/1964.html 

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