sql中varchar和nvarchar的区别,汉字前面加N
参考:https://www.cnblogs.com/net5x/articles/9592295.html
https://blog.csdn.net/qq_42692386/article/details/108148694
参考:https://www.cnblogs.com/net5x/articles/9592295.html
https://blog.csdn.net/qq_42692386/article/details/108148694