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Reuse Calculated values

Author

Topic

Shinho
Starting Member

1 Post

Posted - 2006-11-14 : 11:33:54

What is the best code pratice to use do the following code,

SELECT
fo.no as LNum,
fo.name as LName,
sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END) as In1,
sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END) as In2,
sum(In1+In2)/10 as inDec,
from fo group by fo.no,fo.name order by fo.name

instead of

SELECT
fo.no as LNum,
fo.name as LName,
sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END) as In1,
sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END) as In2,
((sum(CASE fo.docnome WHEN "In" THEN fo.etotal ELSE 0 END))+sum(CASE fo.docnome WHEN "In2" THEN fo.etotal ELSE 0 END)))/10 as inDec,
from fo group by fo.no,fo.name order by fo.name

I cant use functions and procedures. Is there any better and cleaner way to code this, reusing the calculated values?

SwePeso
Patron Saint of Lost Yaks

30421 Posts

Posted - 2006-11-14 : 11:43:57

I would use a derived table like this

SELECT		[No],
		[Name],
		In1,
		In2,
		(In1 + In2) / 10.0 AS inDec
FROM		(
			SELECT		[No],
					[Name],
					SUM(CASE DocNome WHEN 'In' THEN eTotal ELSE 0 END) AS In1,
					SUM(CASE DocNome WHEN 'In2' THEN eTotal ELSE 0 END) AS In2
			FROM		fo
			GROUP BY	[No],
					[Name]
		) g
ORDER BY	[Name]

Peter Larsson
Helsingborg, Sweden

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