What is procedure and function in PL SQL?
“A procedures or function is a group or set of SQL and PL/SQL statements that perform a specific task.” A function and procedure is a named PL/SQL Block which is similar . The major difference between a procedure and a function is, a function must always return a value, but a procedure may or may not return a value.
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.
What are packages in PL SQL?
A package is a schema object that groups logically related PL/SQL types, variables, constants, subprograms, cursors, and exceptions. A package is compiled and stored in the database, where many applications can share its contents.
Which is better package or procedure?
The advantage of a package over a stand-alone procedure is that all the procedures and functions are loaded into memory so that when one procedure within the package calls another within the same package it is already loaded so this should give performance benefits if designed properly.
What is diff between function and procedure?
A function would return the returning value/control to the code or calling function. The procedures perform certain tasks in a particular order on the basis of the given inputs. A procedure, on the other hand, would return the control, but would not return any value to the calling function or the code.
What is the difference between functions and procedures?
What is procedure in PL SQL Oracle?
A procedure is a group of PL/SQL statements that you can call by name. A call specification (sometimes called call spec) declares a Java method or a third-generation language (3GL) routine so that it can be called from SQL and PL/SQL. The call spec tells Oracle Database which Java method to invoke when a call is made.
What is the difference between package and procedure?
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).
What is the difference between procedure and function?
What is the difference between Oracle package and procedure?
A package is a group of related procedures and functions, together with the cursors and variables they use, stored together in the database for continued use as a unit. Similar to standalone procedures and functions, packaged procedures and functions can be called explicitly by applications or users.
What is the difference between package and procedure in SQL?
What is difference between a function and a procedure in PL SQL explain function with example?
A function returns a value and control to calling function or code. A procedure returns the control but not any value to calling function or code. A procedure has support for try-catch blocks. A select statement can have a function call.
Which is better function or stored procedure?
Stored procedures in SQL are easier to create and functions have a more rigid structure and support less clauses and functionality. By the other hand, you can easily use the function results in T-SQL. We show how to concatenate a function with a string. Manipulating results from a stored procedure is more complex.
What is the difference between procedure and function in PL SQL explain with an example?
What is difference between function and procedure?
What is a function in Plsql?
Similar to a procedure, a PL/SQL function is a reusable program unit stored as a schema object in the Oracle Database. The following illustrates the syntax for creating a function: CREATE [OR REPLACE] FUNCTION function_name (parameter_list) RETURN return_type IS. [declarative section] BEGIN.
Why packages are used in Oracle?
Packages allow you to encapsulate logically related types, variables, constants, subprograms, cursors, and exceptions in named PL/SQL modules. By doing this, you make each package more reusable, manageable, readable and reliable.
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.