Hours Calculation in SQL

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I'm doing like this..!!!

DECLARE @minutes AS INT

SET @minutes = 1.80*100

SELECT @minutes / 60 + (@minutes % 60) / 100.0 AS Hours

it gives me 3.000 but the result should be 2.20 hrs

how can i acheive that..?

pls help me out

Posted 22-Feb-14 6:28am

tpkpradeep

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OriginalGriff · Answer 1 · 2014-02-22T06:42:00

Integers. Interesting little devils aren't they...
What is 1.8 * 100?
Answer: 180
What is 180 / 60?
Answer: 3
What is 180 % 60?
Answer: 0

So first off the answer is 3, not 2-and-a-bit at all.

Secondly, What do you get when you integer divide a number less than 60 (as any number % 60 will always be) by 100?
Answer: 0, because integer arithmetic throws away fraction parts of numbers by definition...

So, probably, you want to consider working in floating point numbers throughout...

tpkpradeep · Answer 2 · 2014-02-22T19:15:00

Solution 2

VB

DECLARE @minutes INT
DECLARE @hours INT
DECLARE @time decimal(5,2) = 1.80

SET @hours = floor(@time)
SET @minutes = (@time - @hours) * 100
SET @minutes = @minutes + (@hours * 60)

SELECT  @minutes / 60 + (@minutes % 60) / 100.0 AS Hours

How about this.......!!!!

Posted 22-Feb-14 19:15pm