Consistent Null Handling
- From: "MacGregor, Ian A." <ian@xxxxxxxxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 2 Sep 2004 11:43:12 -0700
One of the posts on "Cure for Madness" brought up consistent null =
handling which Oracle does not do. For instance,
"Select Column1 + Column2 from TableA;" returns null if either or both =
columns are null. However "Select sum(Column1) from table A" will =
return a value if there are non-null values in the column. Is this true =
for all SQL versions? =20
Ian MacGregor
Stanford Linear Accelerato Center
ian@xxxxxxxxxxxxxxxxx
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