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Contained Database Collations

Posted on 2016-11-19
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Last Modified: 2016-11-24
hi experts

i am Reading about Contained Database Collations, but i do not understand
Contained Database Collations
and
Collations of Tempdb
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Question by:enrique_aeo
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6 Comments
 
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Expert Comment

by:Jason clark
ID: 41895331
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LVL 51

Expert Comment

by:Vitor Montalvão
ID: 41895495
When a Contained database is created will get by default the same collation the SQL Server instance has so when you copy/move the Contained database to another SQL Server instance with another default collation it will keep the original collation so you just need to be aware of this and be careful when working with temporary tables since the last ones will have the default collation from the actual SQL Server instance and you might run in collation errors.
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Author Comment

by:enrique_aeo
ID: 41896576
can you give me an example in T-SQL?
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LVL 51

Expert Comment

by:Vitor Montalvão
ID: 41897092
I'm not sure what kind of example are you looking for. This is like working with another regular database that has a different collation from the default so you'll need to explicitly convert to the necessary collation. In this case guarantee that you create the temporary objects with the same collation as the Contained Database:
CREATE TABLE #TempTable 
(
    Id INT,
    Name nvarchar(100) COLLATE Latin1_General_CI_AI
);  

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Author Comment

by:enrique_aeo
ID: 41897727
This problem is solved with: CATALOG_DEFAULT?
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Accepted Solution

by:
Vitor Montalvão earned 2000 total points
ID: 41898681
This problem is solved with: CATALOG_DEFAULT?
There are alternative ways to solve this. My example above is to use the same collation as the Contained Database.
If you want to use the SQL Server instance default collation then you'll need to do it in an opposite way. For example:
USE ContainedDB_name
GO

CREATE TABLE #TempTable 
(
    Id INT,
    Name nvarchar(100) 
);  

SELECT *
FROM MyTable
WHERE Name IN (SELECT Name COLLATE Default_Collation_Name
               FROM #TempTable);

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