在我的数据库中我有这个char .我想查询他们
Select * from Sometable where somecolumn like '%%'这让我没有结果.
我认为这是ANSI编码
使用N如下
where col like N'%%'why do you think ,you need N prefix ：
Prefix Unicode character string constants with the letter N. Without the N prefix, the string is converted to the default code page of the database. This default code page may not recognize certain characters.感谢马丁史密斯,早些时候我只测试了一个字符,它的工作,但正如马丁指出,它返回所有字符..
以下查询工作和返回只有意图
select * from #demo where id like N'%%' COLLATE Latin1_General_100_BIN演示：
create table #demo ( id nvarchar(max) ) insert into #demo values (N''), ( N'')要了解更多关于unicode,请看下面的链接
http://kunststube.net/encoding/
https://www.joelonsoftware.com/2003/10/08/the-absolute-minimum-every-software-developer-absolutely-positively-must-know-about-unicode-and-character-sets-no-excuses/
http://stackoverflow.com/questions/43474596/in-sql-server-database