Divide by question

Question

Divide by question

SQL33

SSCrazy

Points: 2044
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March 8, 2007 at 10:41 am

#123142

I need to do a calculation to tell me the percent of items by dividing the count (total number) of items by a given predetermined number input at runtime .. example .. divide it by 110.
Example:
SELECT number, COUNT(DATE) AS Days
FROM Table
GROUP BY number
But .. when I try to apply the help as shown in Books online,
SELECT ((count(DATE)))/110 AS 'Royalty Amount'
FROM table
GROUP by number
I get the value "0" in the result of the division.
Is this because I need to convert the result of the ((count(date)))/ part to an integer prior to doing the "/110" part?
Thanks~!

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John Rowan SSC Guru Points: 56440 More actions · Answer 1

Converting it to an integer will not get you what you want. The result of COUNT() is an integer. Since integers are whole numbers, dividing integers by integers will generate a whole number result, 0 in your case. You will need to CAST/CONVERT one of your values to a decimal or use 110.00 in place of the integer.

DECLARE @table TABLE (DateCol datetime)

INSERT INTO @table

SELECT GETDATE() UNION ALL

SELECT GETDATE()

SELECT COUNT(DateCol) / 110

FROM @table

SELECT CAST(COUNT(DateCol) AS dec) / 110

FROM @table

SELECT COUNT(DateCol) / 110.00

FROM @table

John Rowan

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Forum Etiquette: How to post data/code on a forum to get the best help[/url] - by Jeff Moden

SQL33 SSCrazy Points: 2044 More actions · Answer 2

Thanks.. that worked great. Is it possible to display the % sign in the calculated result and limit the decimal places to less than the 6 shown by default?

Thanks

Steve Fine Ten Centuries Points: 1164 More actions · Answer 3

One way, there may be a simpler way.

SELECT cast(convert(decimal(8,1),100.0 *(COUNT(DateCol)/110.0))as Varchar)+'%'

FROM @table

Jeff Moden SSC Guru Points: 1004318 More actions · Answer 4

Another way... with right justification to boot...

SELECT STR(COUNT(DateCol)/110.0*100.0,8,1)+'%'

FROM @Table

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

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