SQL Format as of Round off removing decimals

Question

I have a calculated field 'MySum' in inner query whose value after calculation is 58.

I need to get 20% of this value.

If I give:

MySum * 20 /100, I get 11

If I give:

((20 * CAST(MySum as decimal(6,2)))/100) , I get 11.60000

If I give

Round(((20 * CAST(MySum as decimal(6,2)))/100), 2), I still get 11.60000

I want that,

If result comes 11.6, it should display 12 and if result is 11.4, it should display 11.

I want to Rounded off values. Any function for that ?

Solution 1

use ROUND () (See examples ) function in sql server

select round(11.6,0)

result:

12.0

ex2:

select round(11.4,0)

result:

11.0

if you don't want the decimal part, you could do

select cast(round(11.6,0) as int)

Solution 2

CAST(Round(MySum * 20.0 /100, 0) AS INT)

FYI

MySum * 20 /100, I get 11

This is because when all 3 operands are INTs, SQL Server will do perform integer maths, from left to right, truncating all intermediate results.

58 * 20 / 100 => 1160 / 100 => 11 (truncated from 11.6)

Also for the record ROUND(m,n) returns the result to n decimal places, not n significant figures.

Solution 3

check the round function and how does the length argument works. It controls the behaviour of the precision of the result