×
The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.
Now, if your application could support nulls, and you could replace the
zero values with a null value, it would become simpler because aggregate
functions ignore null values. Not really different on the first "where"
but you could omit the second "where".
select * from test a
where n1 = (select Min(n1) from test where n2 is null)
or n2 = (select Min(n2) from test)
But you have to think about how you would use them. For example, average
is commonly computed by taking the sum and dividing by the number of
entries. For example if you have this table:
....+...
TESTNBR
1
2
3
-
Note: The fourth value is null.
select avg(testnbr), min(testnbr) from qtemp/test
you get two and one. The average is the sum of 1, 2, 3 divided by only
three rows. However if you replace the null with a zero you now get 1.50
and 0. The average is now divided by four rows.
Rob Berendt
As an Amazon Associate we earn from qualifying purchases.
This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact
[javascript protected email address].
Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.
midrange.com
