我正在尝试使用安装节点调试npm i ndb --global，但出现此错误：
msvs_version was set from command line or npm config
gyp ERR! find VS - looking for Visual Studio version 2019
gyp ERR! find VS VCINSTALLDIR not set, not running in VS Command Prompt
gyp ERR! find VS could not use PowerShell to find Visual Studio 2017 or newer
gyp ERR! find VS looking for Visual Studio 2015
gyp ERR! find VS - not found
gyp ERR! find VS not looking for VS2013 as it …我有一个数据表.我想列出双重条目.我将使用这样的简单SQL查询:
SELECT artnr, COUNT(artnr) AS cnt FROM table GROUP BY artnr HAVING COUNT(artnr)>1
这怎么应该与linq一起玩？
每次,当我需要使用linq时,我总是坚持使用它.我真的不喜欢它.
谢谢.