What are SQL functions in Oracle?

There are two types of functions in Oracle. 1) Single Row Functions: Single row or Scalar functions return a value for every row that is processed in a query. 2) Group Functions: These functions group the rows of data based on the values returned by the query. This is discussed in SQL GROUP Functions.Click to see full answer. Furthermore, what are SQL functions?A function is a database object in SQL Server. Basically, it is a set of SQL statements that accept only input parameters, perform actions and return the result. A function can return an only a single value or a table.Additionally, what is the use of NVL function in Oracle? The NVL( ) function is available in Oracle, and not in MySQL or SQL Server. This function is used to replace NULL value with another value. It is similar to the IFNULL Function in MySQL and the ISNULL Function in SQL Server. Accordingly, what are the built in functions in SQL? In SQL a built-in function is a piece for programming that takes zero or more inputs and returns a value. An example of a built-in functions is ABS(), which when given a value calculates the absolute (non-negative) value of the number.What is procedure and function in Oracle?The SQL CREATE FUNCTION statement is used to create stored functions that are stored in an Oracle database. A procedure or function is similar to a miniature program. A function is a subprogram that computes and returns a value. Functions and procedures are structured alike, except that functions return a value.