PL/SQL is a procedural language extension to SQL. Functions and procedures are two types of PL/SQL code that can be stored in the database for later use. A function is a piece of code that takes one or more inputs and returns an output. A procedure is a piece of code that takes one or more inputs and does not return an output. Both functions and procedures can be written in PL/SQL or Java and stored in the database.PL/SQL is a procedural language extension to SQL that is used in the Oracle Database. A stored procedure is a subroutine available to applications that access a relational database system. PL/SQL stored procedures and functions are written in PL/SQL, which is an extension of SQL. Functions differ from stored procedures in that they are usually written to accept only input parameters and return one or more values. Stored procedures can accept both input and output parameters.PL/SQL is a procedural language extension to SQL that adds functionality such as looping, error handling, and complex calculations. Functions are self-contained PL/SQL blocks that perform a specific task and return a value. Procedures are similar to functions, but they do not return a value. Both functions and procedures can accept parameters.PL/SQL (Procedural Language/Structured Query Language) is a procedural programming language used in Oracle Database. It has a syntax similar to that of other programming languages, such as C. A stored procedure is a PL/SQL block that can be stored in the database and invoked later, like a subroutine or method. A function is a type of stored procedure that returns a value. Both stored procedures and functions can accept parameters.