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Aged Yak Warrior

United Kingdom
550 Posts

Posted - 11/19/2012 :  05:26:32  Show Profile  Reply with Quote
The pros and cons of adding new tables VS. extending existing tables.

Flowing Fount of Yak Knowledge

5155 Posts

Posted - 11/19/2012 :  06:43:54  Show Profile  Reply with Quote
I don't think there is one universally right answer. It really depends on the business needs and the nature of the DML queries that will be run against the table(s).

If there is only one column that you need to add which would be mostly null, it would be better to add that as a column to the table. (Of course, you would be breaking code that people wrote against the table with a "SELECT *", but if you ask me, they deserve to be broken).

If you have a number of columns, and most of them are null most of the time, a separate table would probably be more appropriate.
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