I'm trying to return several pieces of information from a small table.
Table is 'tickets':
id CHAR(50)
group CHAR(50)
issued DATE
used DATE
'issued' and 'used' are NULL until a date is entered. The found set
is generally based on the 'group'.
I want the actual number of records in a found set - COUNT(*) is easy
- but I also want the number of tickets that exist but which have not
been issued, and the number that HAVE been issued but have not been
used.
In looking via SELECT * FROM tickets, the DATE fields are NULL if
nothing is actually entered into them.
I've tried SELECT COUNT(*), COUNT(ISSUED IS NULL) as notissued... etc
and other variations, but I always get the count for the total (*)
and for the issued field being the same. I expect that this is
because COUNT is counting the total number of found records, but I'm
not sure.
How can I get the numbers I'm interested in?
Thanks,
Nelson
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