What are procedures functions and packages in Oracle?
A procedure or function is a schema object that logically groups a set of SQL and other PL/SQL programming language statements together to perform a specific task. Procedures and functions are created in a user’s schema and stored in a database for continued use.
Which is the functionality of the packages in SQL?
Packages let you encapsulate logically related types, variables, constants, subprograms, cursors, and exceptions in named PL/SQL modules. You can make each package easy to understand, and make the interfaces between packages simple, clear, and well defined. This practice aids application development.
What is the difference between function procedure and package in PL SQL?
Procedure: Procedure is just responsible for a return statement that can stop an execution and return back to the caller. Package: A package, which is a schema object, is responsible for grouping PL/SQL types, subprograms and items, which are logically related.
Why packages are used in Oracle?
Packages let you encapsulate logically related types, items, and subprograms in a named PL/SQL module. Each package is easy to understand, and the interfaces between packages are simple, clear, and well defined. This aids application development.
What are the benefits of PL SQL packages?
PL/SQL has these advantages:
- Tight Integration with SQL.
- High Performance.
- High Productivity.
- Portability.
- Scalability.
- Manageability.
- Support for Object-Oriented Programming.
- Support for Developing Web Applications.
What is a package in PL SQL Mcq?
1) PL/SQL packages are schema objects that group logically related PL/SQL types, variables and subprograms.
What are database packages?
A database package is a 3rd Party database product purchased/licensed, so that a company’s IT programmers don’t have to write the code to create the database system themselves.
What is difference between procedure and package?
A package can contain no procedures or functions. It may just contain data types or global variables. 2. A procedure does not return any values in itself, however it can have parameters that can be used to return values as either OUT or modify (IN/OUT).
Is package and function same?
1 Answer. A function declared in the specification is public and can be invoked from outside the package. A function which is defined in the body but not declared in the specification is private and can only be called from within that package.
What is the difference between package and stored procedure?
The package specification declares these objects. The package body, specified subsequently, defines these objects. Standalone procedures and procedures nested in a package are both stored (compiled) within the database – so are “stored” procedures.
What are PL/SQL packages?
PL/SQL Packages A packageis an encapsulated collection of related program objects (for example, procedures, functions, variables, constants, cursors, and exceptions) stored together in the database. Using packages is an alternative to creating procedures and functions as standalone schema objects.
What are PL/SQL stored procedures and functions?
Stored procedures and functions are the key to modular, reusable PL/SQL code. Wherever you might use a JAR file in Java, a module in Perl, a shared library in C++, or a DLL in Visual Basic, you can use PL/SQL stored procedures, stored functions, and packages.
What types of program units can I create with PL/SQL?
This chapter describes the main types of program units you can create with PL/SQL: procedures, functions, and packages. Procedures, functions, and packages are saved and stored in the database, and can be used as building blocks for applications. For information about the features of the PL/SQL language, see Chapter 4, “Using PL/SQL”.
What are the main actions of PL SQL?
The actions include creating, compiling, creating synonyms for, granting privileges on, and showing dependencies for these source types. This chapter describes the main types of program units you can create with PL/SQL: procedures, functions, and packages.