I have a table where I use 'unused' to signify that a record is not yet
used. I want to know the number of unused records (but only if there are
unused records) and the total number of records.
At the moment I implemented it like:
SELECT *
FROM (
SELECT 'Not used' AS Type
, COUNT(*) AS NoUsed
FROM quotes
WHERE totalUsed == 'unused'
UNION ALL
SELECT 'Total' AS Type
, COUNT(*) AS NoUsed
FROM quotes
)
WHERE NoUsed > 0
Is this correct, or is there a better way?
--
Cecil Westerhof
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