collate

I have this query
select * from archivo1 a
inner join padron.dbo.padron_ruc_bdu b
on a.num_doc = substring (b.ruc,3,8) collate modern_spanish_ci_as
where substring(b.ruc,1,2)<>'20'

i do not understand the use of  collate modern_spanish_ci_as
enrique_aeoAsked:
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cyberkiwiCommented:
Hi,

It makes SQL Server do the comparison based on the specific collation.
You need to use collate x if the db collation is different from the sql server default collation and you are using functions.

See these references for collation

http://msdn.microsoft.com/en-us/library/ms144260.aspx
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AbarajCommented:
collate make the query case sensitive and retrieve only one record from the query
Adding COLLATE modern_spanish_ci_as makes the search case sensitive.

Default Collation of the SQL Server installation SQL_Latin1_General_CP1_CI_AS is not case sensitive.
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cyberkiwiCommented:
Hi abaraj,

FYI If you look closely, _ci_as means case-insensitive, ascent sensitive..... so I don't know what you're on

Try this

select case when 'a' = 'A' COLLATE modern_spanish_ci_as then 1 else 0 end
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AbarajCommented:
Hi cyberkiwi,
Thanks for your input
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Microsoft SQL Server 2008

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