Last updated on October 30th, 2018 at 04:35 amNULLIF function is very useful function .It compare two values and return null if the values are same , else return the first value expr1 : it is the source values or expression which is going to be compared with expr2 expr2 : It is also the source value which is compared with expr1 You cannot specify … Continue reading NULLIF function in Oracle »