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 Transact-SQL (2012)
 WHERE IN clause with non-English text fails
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LexOccam
Starting Member

USA
1 Posts

Posted - 04/15/2013 :  18:08:50  Show Profile  Reply with Quote
I have a simple table with { Name nvarchar(50), ID (int) } columns in an English (EN-Us) database.

A tester inserts the following Names: ??, öÄéß, ?e?µ

I would like to know why a SELECT statement with a WHERE IN clause only yields one result, even though all values are specified as nvarchar. Thank you.

Example query:

Declare @setOfIds nvarchar(200) = N'''??'',''öÄéß'',''?e?µ'''
Declare @strSql nvarchar(1024)
Set @strSql = N'SELECT Name, ID from MyTable WHERE Name IN (' + @setOfIds + N')'
EXEC (@strSql)

bandi
Flowing Fount of Yak Knowledge

India
2206 Posts

Posted - 04/16/2013 :  00:19:04  Show Profile  Reply with Quote
-- see this illustration... working fine
CREATE TABLE Names (name NVARCHAR(100))
INSERT INTO Names
SELECT '??'union all
SELECT 'öÄéß' union all
SELECT '?e?µ'
--I would like to know why a SELECT statement with a WHERE IN clause only yields one result, even though all values are specified as nvarchar.

Declare @setOfIds nvarchar(200) = N'''??'',''öÄéß'',''?e?µ'''
Declare @strSql nvarchar(1024)
Set @strSql = N'SELECT Name from Names WHERE Name IN (' + @setOfIds + N')'
EXEC (@strSql)

/*Output:
Name
----------------------------------------------------------------------------------------------------
??
öÄéß
?e?µ
*/

--
Chandu
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visakh16
Very Important crosS Applying yaK Herder

India
52317 Posts

Posted - 04/16/2013 :  02:28:58  Show Profile  Reply with Quote
First check if datatype of Name field is nvarchar

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