'Best' way to create calculated field

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'Best' way to create calculated field

Cecil Westerhof-5
At the moment I have the following query:
SELECT Minimum
,      Maximum
,      Maximum - Minimum AS Range
FROM   (
    SELECT MIN(totalUsed) AS Minimum
    ,      MAX(totalUsed) AS Maximum
    FROM   quotes

I like this better as:
SELECT MIN(totalUsed)                  AS Minimum
,      MAX(totalUsed)                  AS Maximum
,      MAX(totalUsed) - MIN(totalUsed) AS Range
FROM   quotes

​Or is there a reason to go for the second query, or even a total different

Cecil Westerhof
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