Collation Conflict

Hi,
I am running a query over 2 tables in 2 different databases.
I get the following error "Cannot resolve collation conflict for equal to
operation"
for example
SELECT TOP 100 [TB1].[Product] AS Q0000000 FROM ( [BD1].[dbo].[TB1] [TB1]
INNER JOIN [DB2].[dbo].[TB2] [TB2] ON [TB1].[Product]=[TB2].[ProductCode])
WHERE [TB2].[ProdGroup]=@.PG
@.PG is a string parameter.
Regards
TimModify your query so that it converts your joins to
unicode data. This will make it collation independant.
PS Do you want to know why it went wrong or are you ok
with it ?
J
>--Original Message--
>Hi,
>I am running a query over 2 tables in 2 different
databases.
>I get the following error "Cannot resolve collation
conflict for equal to
>operation"
>for example
>SELECT TOP 100 [TB1].[Product] AS Q0000000 FROM ( [BD1].
[dbo].[TB1] [TB1]
>INNER JOIN [DB2].[dbo].[TB2] [TB2] ON [TB1].[Product]=[TB2].[ProductCode])
>WHERE [TB2].[ProdGroup]=@.PG
>@.PG is a string parameter.
>Regards
>Tim
>
>.
>|||Your TEMPDB collation differs to your database,
You either need to preform Julie option or do a rebuildm to the correct
collation but this would wipe out your users, and user databases (you can
reattached).
J
"Tim Marsden" <TM@.UK.COM> wrote in message
news:e0iKaZjQEHA.132@.TK2MSFTNGP09.phx.gbl...
> Hi,
> I am running a query over 2 tables in 2 different databases.
> I get the following error "Cannot resolve collation conflict for equal to
> operation"
> for example
> SELECT TOP 100 [TB1].[Product] AS Q0000000 FROM ( [BD1].[dbo].[TB1] [TB1]
> INNER JOIN [DB2].[dbo].[TB2] [TB2] ON [TB1].[Product]=[TB2].[ProductCode])
> WHERE [TB2].[ProdGroup]=@.PG
> @.PG is a string parameter.
> Regards
> Tim
>|||Many Thanks
Please could you explain why it when wrong, and give me an example of
unicodes joins.
Regards
Tim
"Julie" <anonymous@.discussions.microsoft.com> wrote in message
news:11c6101c4423b$568580b0$a301280a@.phx.gbl...
> Modify your query so that it converts your joins to
> unicode data. This will make it collation independant.
> PS Do you want to know why it went wrong or are you ok
> with it ?
> J
>
> >--Original Message--
> >Hi,
> >
> >I am running a query over 2 tables in 2 different
> databases.
> >I get the following error "Cannot resolve collation
> conflict for equal to
> >operation"
> >
> >for example
> >
> >SELECT TOP 100 [TB1].[Product] AS Q0000000 FROM ( [BD1].
> [dbo].[TB1] [TB1]
> >INNER JOIN [DB2].[dbo].[TB2] [TB2] ON [TB1].[Product]=> [TB2].[ProductCode])
> >WHERE [TB2].[ProdGroup]=@.PG
> >
> >@.PG is a string parameter.
> >
> >Regards
> >Tim
> >
> >
> >.
> >|||Your [TB1].[Product] and [TB2].[ProductCode] columns have different
collations, so the result of the join expression is ambiguous. Take a
look at the BOL topic "Collation Precedence" -- it provides a good
explanation of the problem. You can avoid this fairly trivially by
providing a COLLATE clause that removes the ambiguity like this:
SELECT TOP 100 [TB1].[Product] AS Q0000000
FROM ( [BD1].[dbo].[TB1] [TB1]
INNER JOIN [DB2].[dbo].[TB2] [TB2]
ON [TB1].[Product]=[TB2].[ProductCode]) COLLATE database_default
WHERE [TB2].[ProdGroup]=@.PG
but this will make it impossible for the QP to use an index seek on the
right side of the join. If this is a big problem it may be better to
change the collation of one of the two columns (using ALTER TABLE ALTER
COLUMN) so that the collations match. Note that to run ALTER COLUMN on a
column's collation you must first drop any indexes, stats, or constraints
that reference the column.
Bart
--
Bart Duncan
Microsoft SQL Server Support
Please reply to the newsgroup only - thanks.
This posting is provided "AS IS" with no warranties, and confers no
rights.
From: "Tim Marsden" <TM@.UK.COM>
References: <e0iKaZjQEHA.132@.TK2MSFTNGP09.phx.gbl>
<11c6101c4423b$568580b0$a301280a@.phx.gbl>
Subject: Re: Collation Conflict
Date: Tue, 25 May 2004 14:49:31 +0100
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Many Thanks
Please could you explain why it when wrong, and give me an example of
unicodes joins.
Regards
Tim
"Julie" <anonymous@.discussions.microsoft.com> wrote in message
news:11c6101c4423b$568580b0$a301280a@.phx.gbl...
> Modify your query so that it converts your joins to
> unicode data. This will make it collation independant.
> PS Do you want to know why it went wrong or are you ok
> with it ?
> J
>
> >--Original Message--
> >Hi,
> >
> >I am running a query over 2 tables in 2 different
> databases.
> >I get the following error "Cannot resolve collation
> conflict for equal to
> >operation"
> >
> >for example
> >
> >SELECT TOP 100 [TB1].[Product] AS Q0000000 FROM ( [BD1].
> [dbo].[TB1] [TB1]
> >INNER JOIN [DB2].[dbo].[TB2] [TB2] ON [TB1].[Product]=> [TB2].[ProductCode])
> >WHERE [TB2].[ProdGroup]=@.PG
> >
> >@.PG is a string parameter.
> >
> >Regards
> >Tim
> >
> >
> >.
> >