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Collation


Collation

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kapil_kk
kapil_kk
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How can I change the collation for all columns of a table?

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memymasta
memymasta
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Collations cannot be changed specifically for columns, they effect the whole DB.

But you can temporarily change them like this:

SELECT top 10  firstname COLLATE SQL_Latin1_General_CP1_CI_AS FROM users 


kapil_kk
kapil_kk
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when i tried to change collation for a column I got this error--
Expression type tinyint is invalid for COLLATE clause.

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anthony.green
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@kapil_kk

numeric columns dont have a collation.


@memymasta

collation can be changed at the server, database or column level depending what you want to do



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kapil_kk
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@anthony,
how can we change the collation of a table?

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anthony.green
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My bad, you cant change the table collation, that should of been the database level, to alter a table you can change column collations

Drop all indexes on any columns which are string data types

Change all existing columns using ALTER TABLE .... ALTER COLUMN ... COLLATE ...

Re-create all indexes.



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kapil_kk
kapil_kk
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if i have 50 columns in a table of datatype varchar then do i need to manually change the collation using ALTER for each column..w00t

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anthony.green
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Yes that is correct



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Lowell
Lowell
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it also gets a lot more difficult if you have any constraints on any of those 50 columns...unique constraints, indexes, defaults, etc could prevent the ALTER command from completing.... all those constraints have to be dropped first, then change the collation, and then recreate those indexes and constraints after you change the collation.

Lowell

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