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Collation and SQL_VARIANT


Collation and SQL_VARIANT

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Andre Guerreiro
Andre Guerreiro
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Amazing question! Thank you.

Best regards,

Best regards,

Andre Guerreiro Neto

Database Analyst
http://www.softplan.com.br
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Michael Riemer
Michael Riemer
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Great question, I have definitely learnt something today! Whether I ever use it will be another question!!! :-)
Thanks
Thomas Abraham
Thomas Abraham
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Not only was the question a good one, but the explanation was clear and well presented. Plus, the question didn't use a lot of unnecessary code to make the point. Bravo!

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Paul White
Paul White
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call.copse (11/1/2011)
I occassionally use an EAV type thing for very limited cases (storing central control variables that may vary by territory say) - is SQL_VARIANT a good move for storing these, where it may be text numbers or dates? I've tended to just use nvarchar(MAX) before and convert as needed.

For the UNPIVOT this would be for normalising some data perhaps for import purposes? I'm just struggling to come up with a use for this SQL_VARIANT chappy.

SQL_VARIANT might be a good choice; after all it was added as a popular user-requested feature for EAV scenarios. It can make some EAV things a lot neater and easier, and there are other language features like SQL_VARIANT_PROPERTY that support this sort of use. Many people find using NVARCHAR(MAX) feels clunky in comparison (and downright awkward if you need to store different collations as in the example given in the question). The various pros and cons are way too much to get into detail with, but it's definitely something to familiarize yourself with, like other new-ish things in the same area like SPARSE columns.



Paul White
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TomThomson
TomThomson
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Excellent question.

I wonder if there's another on sql_variant in the pipleline?

Tom

Britt Cluff
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Wow, did I have to think on this one. Thanks for the interesting question.

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Paul White
Paul White
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L' Eomot Inversé (11/1/2011)
Excellent question.

I wonder if there's another on sql_variant in the pipleline?

Not at this stage, at least not by me. I was going to do one based on the weird sort order of SQL_VARIANT, but it's too obtuse even for me :-D



Paul White
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Paul White
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Britt Cluff (11/1/2011)
Wow, did I have to think on this one. Thanks for the interesting question.

Me too - and I wrote the thing (a month or so ago).



Paul White
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Rich Weissler
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Only row 2 matches the explicit Latin1_General_CI_AS collation in the query.

I see one row. Which is the other one?
Mike Palecek
Mike Palecek
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Great question, I sure learned something new this morning.
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