Question

I have a column that contains pet names with national characters. How do I write the query to match them all in one condition?

|PetName|

   Ćin
   ćin
   Ĉin
   ĉin
   Ċin
   ċin
   Čin
   čin

sth like FLATTEN funciton here:

...WHERE LOWER(FLATTEN(PetName)) = 'cin'

Tried to cast it to from NVARCHAR to VARCHAR but it didn’t help. I’d like to avoid using REPLACE for every character.

Answer 1

this should work because cyrillic collation base cases all diacritics like Đ,Ž,Ć,Č,Š,etc…

declare @t table(PetName nvarchar(100))
insert into @t
SELECT N'Ćin' union all 
SELECT N'ćin' union all 
SELECT N'Ĉin' union all 
SELECT N'ĉin' union all 
SELECT N'Ċin' union all 
SELECT N'ċin' union all 
SELECT N'Čin' union all 
SELECT N'čin'

SELECT  *
FROM    @t
WHERE   lower(PetName) = 'cin' COLLATE Cyrillic_General_CS_AI