Format mask a number

Hi,
I'm using db 10.2.0.1.0
I'm trying to find a difference between two dates using the below formula
:STM_DURATION := to_number     ( trunc( :STM_END_TIME - :STM_ST_TIME )*24
     + trunc( mod( (:STM_END_TIME - :STM_ST_TIME)*24, 24 ) )
     ||'.'|| trunc( mod( (:STM_END_TIME - :STM_ST_TIME)*24*60, 60 ) )) ;But if the difference is 3 minutes or 30 minutes, it is showing .3
How can i set the number to 2 decimal point? or how can i find the actual difference
Thanks
Edited by: Divya on Oct 31, 2011 10:12 PM

Divya wrote:
Hi,
I'm using db 10.2.0.1.0
I'm trying to find a difference between two dates using the below formula
     :STM_DURATION := to_number     ( trunc( :STM_END_TIME - :STM_ST_TIME )*24
                                                                           + trunc( mod( (:STM_END_TIME - :STM_ST_TIME)*24, 24 ) )
                                                                            ||'.'|| trunc( mod( (:STM_END_TIME - :STM_ST_TIME)*24*60, 60 ) )) ;But if the difference is 3 minutes or 30 minutes, it is showing .3
How can i set the number to 2 decimal point? or how can i find the actual difference
Thankswhat do you mean "the actual difference"
your result will give you the number of hours in the rounded down number of days between the two dates.
don't trunc the result of taking one date away from another if you want the real result. also, since a date minus a date is a number, you don't need to_number.
as for actually displaying the result the way you want, the function you should look into is TO_CHAR();

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