How to cope with missing values - NULLS?
From: Peter Koch Larsen <pkl_at_mailme.dk>
Date: 18 Apr 2003 08:17:45 -0700
Message-ID: <61c84197.0304180717.4b080976_at_posting.google.com>
How to cope with missing values - NULLS? The to me fundamental problem is how to cope with missing values. I agree that You have no need for them in base tables, but what happens in the situation where you have an outer join? If outer joins are to be provided by the DBMS - and I believe they are to useful to be let out - there must be some means of denoting that a field has no value. There are three ways to go:
Date: 18 Apr 2003 08:17:45 -0700
Message-ID: <61c84197.0304180717.4b080976_at_posting.google.com>
How to cope with missing values - NULLS? The to me fundamental problem is how to cope with missing values. I agree that You have no need for them in base tables, but what happens in the situation where you have an outer join? If outer joins are to be provided by the DBMS - and I believe they are to useful to be let out - there must be some means of denoting that a field has no value. There are three ways to go:
Kind regards
Peter
Received on Fri Apr 18 2003 - 17:17:45 CEST