Get the fractional part of a decimal with SSIS Expressions

  • This shouldn't be too hard but I'm still having trouble getting the fractional part of a decimal number using SSIS expressions without jumping through a lot of hoops.

    I found this simple method to get the fractional part using T-SQL.

    Select 1.2 % 1

    So of course I thought, "SSIS expressions have a modulo operator, I'll just use that." But it doesn't work. It looks like you can only use integers when using the modulo operator in an expression.

    Short of converting the decimal to a string, finding the decimal position using Findstring, then digging out the fractional part using a substring function, what is the best option for getting the fractional part of a decimal number?

  • How about

    1.2 - FLOOR(1.2)

    Floor returns the largest integer that is less than or equal to the numeric expression

  • Daniel Bowlin (2/19/2013)


    How about

    1.2 - FLOOR(1.2)

    Floor returns the largest integer that is less than or equal to the numeric expression

    Not true for negatives. Try this:

    select -11.2 - floor(-11.2)

    But stick to positive numbers, or use ABS() too and it should work.

    The absence of evidence is not evidence of absence
    - Martin Rees
    The absence of consumable DDL, sample data and desired results is, however, evidence of the absence of my response
    - Phil Parkin

  • Awesome! That works!

    I was already using Floor to pull out the integer part of the decimal. It didn't occur to me to use floor to subtract the integer from the decimal to get the fractional part. The only part I had to add was a cast to decimal to get the result; in my case:

    (DT_DECIMAL,2)((1.2 - FLOOR(1.2)) * 100))

    Thanks!

  • Thanks Phil,

    In my case, this will always be a positive decimal. But you made a good point.

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