----- Original Message -----
From: <rob@xxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Sent: Thursday, March 25, 2004 5:05 PM
Subject: Re: Null in SQL select union


> I'm a little confused also.  Suppose your table had the following data:
> ....+....1....+....2....+.

I want to get one line for each car color and type and an additional line
with the number of cars with the same type in my query output:

Type    Color    Number
--------------------------------
Pickup    Red    -
Pickup    Blue    -
-            -            2
Van        Red    -
Van        Blue    -
Van        Green    -
-            -            3

When I use value 0 or '' as replacement in the second select-clause, the
total line are not positioned after the detail lines. Using NULL should do
so.

Hope I could make clear what I mean? :-)

Titus




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