The CREATE FUNCTION statement creates or replaces a standalone function or a call specification.

SQL functions are used exclusively with SQL commands within SQL statements. There are two general types of SQL functions: single row (or scalar) functions and aggregate functions. These two types differ in the number of database rows on which they act.

Summary: in this tutorial, you will learn how to develop a PL/SQL function and how to call it in various places such as an assignment statement, a Boolean expression, and an SQL statement. Similar to a procedure, a PL/SQL function is a reusable program unit stored as a schema object in the Oracle Database.

This Oracle tutorial explains how to create and drop functions in Oracle / PLSQL with syntax and examples. In Oracle, you can create your own functions. The syntax for a function is:

Jun 15, 2024 · PL/SQL functions are reusable blocks of code that can be used to perform specific tasks. They are similar to procedures but must always return a value. A function in PL/SQL contains: Function Header: The function header includes the function name and an optional parameter list. It is the first part of the function and specifies the name and ...

This page contains a list of all Oracle SQL functions. It contains SQL functions from Oracle 12c, as well as older versions such as 9i, 10g, and 11g. It’s a great page for you to bookmark for future reference. You don’t need to search through Oracle documentation to remember how a …

For easy reference, we have provided a list of all Oracle/PLSQL functions. The list of Oracle/PLSQL functions is sorted into the type of function based on categories such as string/character, conversion, advanced, numeric/mathematical, and date/time. These functions can be used in SQL statements or queries in Oracle.

A function in Oracle can be simply understood as a subprogram. It is mainly used to return a single value. There are mainly three subprocesses for a function to execute successfully: Declaration, Definition and Calling.

Aug 30, 2017 · This article will help you to understand how to create a user defined function. It’s also known as stored function or user function. User defined functions are similar to procedures. The only difference is that function always returns a value. User defined functions can be used as a part of an SQL expression.

SQL functions are built into Oracle Database and are available for use in various appropriate SQL statements. Do not confuse SQL functions with user-defined functions written in PL/SQL.