outer join and count(*) SQL question...
Aaron Bratcher
aaronbratcher at abdatatools.com
Wed Dec 3 09:45:48 CST 2003
Can I do the following:
I have 2 tables, the second is a list lookup table.
I want to get a count of all items in the 2nd table. If the item isn't
used, then to have a zero.
I tried this SQL command:
select category,lists.listValue,count(*) from roster1,lists where
roster1.race =* lists.listID and lists.listName = 'race' group by
lists.listValue
I was expecting something like this to be returned:
Race Asian/Pacific Islander 0
Race Black 0
Race Hispanic 0
Race Native American/Alaskan 0
Race Other 0
Race White 4
but instead got this:
Race Asian/Pacific Islander 1
Race Black 1
Race Hispanic 1
Race Native American/Alaskan 1
Race Other 1
Race White 4
Which makes sense I guess because 1 record is now being returned for
all of the non-used races. Is there a way with SQL to get what I want?
Or will I have to do this in small steps, appending my answers to a
table?
Thanks for any input.
--
Aaron Bratcher
ab DataTools
http://www.abDataTools.com
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