how to round decimal values to number in sql server

Question

I want to update decimal values using CAST FUNCTION

Example values:

Result like this:

Answer 1

That type of formatting should probably be done in your application layer rather than in SQL Server.

You would use the column name discount_perc instead of 0.4 in the following examples:

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You can use cast() like so:

select cast(cast(0.4*100 as int) as varchar(12))+'%'

returns: 40%

rextester demo: http://rextester.com/PSPVY57957

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In SQL Server 2012+ you can use format() :

select format(0.4,'0%')

returns: 40%

But format() can be slower, take a look here: format() is nice and all, but… - Aaron Bertrand