×
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.
Can someone please explain how I can ever get a lower row count from a left outer join than the number of rows that exist in the left table?
select count(*)
from table1 a left outer join table2 b
on a.email = b.email
where b.event = '2103SM'
order by attend;
That returns query returns a count of 848 rows. There are 858 rows in table1! (left table). And just for fun an inner join also returns 848 rows.
Any ideas anyone? I thought it was an absolute that a left outer always returned all rows in the left table.
Jon Paris
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
