Functions in Oracle SQL Functions is one of the important features in Oracle SQL, with the help of this functions we can able to get the result as per our requirement. Functions in Oracle SQL contains Single Row Functions, Multiple Row Functions. Mainly those functions are used to returns value based on the input that which we given. And practicing this functions in oracle SQL, one can able to master in query writing. Functions is used to perform some actions like doing any calculations, grouping the data, conversion in type, date conversion etc. Types of Functions in Oracle SQL Functions in oracle is classified on the basis of the input which we are giving and getting the output, and they are: - Single Row Functions - Multiple Row Functions Single Row Functions in Oracle SQL Single Row Functions works on the single rows which will shows the result for that single rows only. If "n" number of inputs to give "n" number of outputs. From the above figure explains about