DB2 Decimal Division

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Hi All,

I am having tough time doing a simple division in DB2 Stored procedure.

I am using Data studio and working on DB2 z/OS v9.1

My variables:
-------------
value Decimal(18,13)
total_value Decimal(18,13)
Percentage Decimal(12, 9)

Simple Division:
--------------
Percentage= value/total_value * 100

My values:
----------
value = 45.23
total_value = 57.35

Expected Result:
----------------
percentage = 78.866608544

I am getting the percentage as zero. After spending few hrs on browsing I found

http://publib.boulder.ibm.com/infocenter/dzichelp/v2r2/index.jsp?topic=/com.ibm.db2z10.doc.sqlref/src/tpc/db2z_decimaldivision.htm[^]

I couldn't able to understand completely but figured out it has to do with precision and scale.
then I played with it and finally i got the result by doing
(cast(value as decimal(15,13)) / cas(total_value as decimal(22,9)) * 100.

Now i found that i am not supposed to cast those values .

Is there any other way of getting result without casting????
Please respond ASAP.......Looking after the solution

Posted 15-Aug-11 10:12am

YogiG

Updated 15-Aug-11 10:19am

Wendelius

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Wendelius 15-Aug-11 16:20pm

Modified the hyperlink

1 solution

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Wendelius · Accepted Answer · 2011-08-15T10:26:00

Solution 1

It's been ages since I last used DB2, but what happens if you change the precision for the percentage. So instead of:

Percentage Decimal(12, 9)

use

Percentage Decimal(18, 13)

or higher.

Posted 15-Aug-11 10:26am

Wendelius

Comments

YogiG 15-Aug-11 16:33pm

I tried that but no use..

Wendelius 15-Aug-11 16:42pm

And have also tried using float instead of decimal for all variables?

YogiG 15-Aug-11 16:58pm

Hi that helped, I wasn't trying that because I am not supposed to change datatype. Now i used casting instead changing the datatype. Thanks

Wendelius 15-Aug-11 17:24pm

That's good. Most likely the fixed location of the decimal point caused the truncation.