How To I Convert An Int To A Decimal For One Query

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Basically, I have two columns i shall be working with..

First column is SalaryAmount, then the second column is AmountPerHour. Now SalaryAmount is an int and AmountPerHour is a decimal.

But the AmountPerHour is based on the calculation of the SalaryAmount for example...

Here is the SQL query i have for the AmountPerHour..

SQL

UPDATE Salary SET SalaryAmount=@SalaryAmount,
                AmountPerHour= round((@SalaryAmount / 52 /48), 2, 4)

But the real answer should be 12.02, but it comes out as 12.00. Not im not sure if this is because of the rounding. or because of the fact that you can't calculate an int number and want it to come out as a decimal?

So my question, is that is there a way where i can convert the SalaryAmount to a decimal just for one query, and then change it back at the end? Therefore the calcuation is done correctly and the number isnt rounded off.

Please dont say change the salaryamount to decimal altogether because that messes alot with the code i have from other projects as they all use the same database.

Posted 16-Apr-14 8:25am

Chris_Burns

Updated 16-Apr-14 8:29am

v2

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2 solutions

Solution 2

Convert @SalaryAmount to decimal before doing this calculation.

Posted 16-Apr-14 8:31am

Abhinav S

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OriginalGriff · Accepted Answer · 2014-04-16T08:29:00

Solution 1

Yes:

SQL

UPDATE Salary SET SalaryAmount=@SalaryAmount,
                AmountPerHour= round((CAST(@SalaryAmount AS DECIMAL(18,0)) / 52.0 /48.0), 2, 4)

Posted 16-Apr-14 8:29am

OriginalGriff

Updated 16-Apr-14 8:30am

v2

Comments

[no name] 16-Apr-14 14:31pm

I love you, thank you, you have literally saved me hours off troubleshooting..

I do ask, can you explain to me how that works? I like to learn from my mistakes :) Thank you.

OriginalGriff 16-Apr-14 14:34pm

All it does is cast the one value to a double from it's int - which means that the result of the whole calculation is a double as well. So the intermediate fractional parts aren't thorwn away, is all.

[no name] 16-Apr-14 14:35pm

Perfect.. Thank you buddy :)