Posted by Nacho on 04/25/07 13:58

Hi,

I'm designing a new database and I have a doubt in which surely you
can help me.
I'm storing in this database historical data of some measurements and
the system in constantly growing, new measurements are added every
day.
So, I have to set some extra columns in advance, so space is available
whenever is needed and the client doesn't have to modify the structure
in SQL server.
The question is: the more columns I add "just in case", the slower the
SQL reads the table?
Of course the "empty" columns are not included in any query until they
have some valid data inside.
Will I have better performance if I configure only the columns being
used at the moment, without any empty columns?

Thanks in advance.

Ignacio

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