Can i use function inside sql in a form ?????

Here SERIAL_NUM is a function, this sql work fine in TOAD and SQLPLUS but inside the form iam getting error saying "function serial_num cannot be used in a sql" Why is it like that ?? Is there anyother way to execute this sql ?
cursor c1 is
SELECT msn.ATTRIBUTE7 Order_No,
SERIAL_NUM(i.SERIAL_NUMBER) Serial_No,
msn.ATTRIBUTE5 Firmware,
msn.ATTRIBUTE15 Site_Pref
FROM atrd.INSTALLER_INFO i,
mtl_serial_numbers msn
where SERIAL_NUM(i.SERIAL_NUMBER)=msn.SERIAL_NUMBER

hi,
yes of course you can use the functions in sql as well as in forms( within sql statements).
here i think you are not connected to the Specified user which is having the function Serial_num
or other thing may that ur syntax
just check both of them that may help you.
enjoy
Tehzeeb Ahmed

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