Format number as percent in MS SQL Server

I am trying to simply format a number as a percent with two decimal places. If it is 37 divided by 38 (aka .973684210526315789), I would like it to show 97.36 % in the SQL output. I know it is recommended to do formatting in the Application, however this is for an automated export. This is using SQL Server 2008.

Here is what I have now:

select CONVERT(VARCHAR(50),cast(37 as decimal)/cast(38 as decimal)*100)+' %' AS [%]

If you could explain what the various parameters are as well in any function that would be helpful.

Answers


M.Ali's answer could be modified as

select Cast(Cast((37.0/38.0)*100 as decimal(18,2)) as varchar(5)) + ' %' as Percentage

In SQL Server 2012 and later, there is the FORMAT() function. You can pass it a 'P' parameter for percentage. For example:

SELECT FORMAT((37.0/38.0),'P') as [Percentage] -- 97.37 %

To support percentage decimal precision, you can use P0 for no decimals (whole-numbers) or P3 for 3 decimals (97.368%).

SELECT FORMAT((37.0/38.0),'P0') as [WholeNumberPercentage] -- 97 %
SELECT FORMAT((37.0/38.0),'P3') as [ThreeDecimalsPercentage] -- 97.368 %

SELECT cast( cast(round(37.0/38.0,2) AS DECIMAL(18,2)) as varchar(100)) + ' %'

RESULT:  0.97 %

And for all SQL Server versions

SELECT CAST(0.973684210526315789 * 100 AS DECIMAL(18, 2))

Using FORMAT function in new versions of SQL Server is much simpler and allows much more control:

FORMAT(yournumber, '#,##0.0%')

Benefit of this is you can control additional things like thousand separators and you don't get that space between the number and '%'.


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