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#1
October 15th, 2013, 09:16 AM
 nagysz
Contributing User

Join Date: Jul 2006
Posts: 205
Time spent in forums: 1 Day 12 h 16 m 7 sec
Reputation Power: 14
Cutting down decimals

Hi all,

when working with decimals i know how to add the numer of decimals...i have to power it with a decimal

like integer * 1.000 = 3 decimal number

but now i have the inverse scenario:
in a formula i have a lot of 6 decimal numbers and the problem is that the result is too big and gives this error:

Quote:
 Arithmetic overflow or division by zero has occurred. arithmetic exception, numeric overflow, or string truncation. numeric value is out of range.

how can i cut down decimals?

here is the formula i use:

Quote:
 UPDATE cal SET dif_c=IIF(COALESCE(warm_c + warmdif_c, 0) = 0, 0, ROUND(1.0 * warmdif_c / (warm_c + warmdif_c) * energy_c),6)

where
DIF_C, WARMDIF_C, ENERGY_C = NUMBER(15,6)
WARM_C = NUMBER(15.2)

#2
October 17th, 2013, 10:48 AM
 emailx45
Contributing User

Join Date: Sep 2008
Posts: 51
Time spent in forums: 11 h 33 m 40 sec
Reputation Power: 6

Try see the value in use, first! If N / 0 = error of course
if ( x < Type > x ) = error of cource

Try to use one procedure for test.

see:
http://www.firebirdsql.org/refdocs/langrefupd25-psql.html
http://www.firebirdsql.org/refdocs/langrefupd25-intfunc-round.html
http://www.firebirdsql.org/refdocs/langrefupd25-intfunc-trunc.html
http://www.firebirdsql.org/refdocs/langrefupd25-intfunc-coalesce.html

or
http://www.firebirdsql.org/refdocs/langrefupd25.html

See the diferece between NUMERIC and DECIMAL type

REMEMBER: ANY calculation or other with NULL, ALWAYS is NULL resulted

n / NULL = NULL = error

Last edited by emailx45 : October 17th, 2013 at 10:52 AM.

 Viewing: Dev Shed Forums > Databases > Firebird SQL Development > Cutting down decimals

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