In oracle stored procedure? (2023)

Asked by: Friedrich Armstrong

Score: 4.1/5 (35 votes)

Stored procedures and functions (subprograms) can be compiled and stored in an Oracle Database XE, ready to be executed. Once compiled, it is a schema object known as a stored procedure or stored function, which can be referenced or called any number of times by multiple applications connected to Oracle Database XE.

Where are Oracle procedures stored?

You can store PL/SQL procedures in the database, and call these stored procedures from Oracle applications. Storing a procedure in the database offers many advantages. Only one copy of the procedure needs to be maintained, it is in the database, and it can be accessed by many different applications.

Why we use stored procedure in Oracle?

By grouping SQL statements, a stored procedure allows the statements to be processed with a single call. This reduces network traffic and improves round-trip response time. Additionally, stored procedures enable you to take advantage of the computing resources of the server.

What is the difference between AS and is in an Oracle stored procedure?

The AS keyword is used instead of the IS keyword for creating a standalone function. [ A standalone stored function is a function (a subprogram that returns a single value) that is stored in the database.

How do I create a stored procedure in Oracle?

Compile one or more procedures, using one of these methods:

  1. Use the ALTER PROCEDURE or ALTER PACKAGE command to recompile the procedure or the entire package.
  2. Drop the procedure and create it again.
  3. Use CREATE OR REPLACE to recompile the procedure.

16 related questions found

What is P code in Oracle?

P-code is Pre-complied code stored in Public cache memory of System Global Area after the Oracle instance is started, whereas sourcecode is a simple code of sp, package, trigger, functions etc which are stored in Oracle system defined data dictionary.

How do I change a stored procedure in Oracle?

Follow these steps to edit stored procedure in Oracle SQL Developer.

  1. In Oracle SQL Developer, click on the Schema to expand the node on the left side.
  2. Then click on the Procedure node to expand.
  3. List of Stored Procedure will display.
  4. Then click on the procedure name which you want to edit.

What is difference between stored procedure and procedure?

The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters. Functions can be called from Procedure whereas Procedures cannot be called from a Function.

What is difference between stored procedure and trigger?

A stored procedure is a user defined piece of code written in the local version of PL/SQL, which may return a value (making it a function) that is invoked by calling it explicitly. A trigger is a stored procedure that runs automatically when various events happen (eg update, insert, delete).

Is Vs as Plsql?

Difference between 'IS' and 'AS' in PL/SQL

Answer: The PL/SQL language evolved such the the "IS" and "AS" operators are equivalent. Functionally the "IS" and "AS" syntax performs identical functions and can be used interchangeably. ... SQL> create or replace view emp_view as select * from scott.

Why do we need stored procedure?

A stored procedure provides an important layer of security between the user interface and the database. It supports security through data access controls because end users may enter or change data, but do not write procedures. ... It improves productivity because statements in a stored procedure only must be written once.

Why stored procedure is better than query?

every query is submited it will be compiled & then executed. where as stored procedure is compiled when it is submitted for the first time & this compiled content is stored in something called procedure cache,for subsequent calls no compilation,just execution & hence better performance than query.

What is the purpose of stored procedure?

A Stored Procedure is pre-compiled collection of SQL statements and SQL command logic in stored in database. The main purpose of stored procedure is to hide direct SQL queries from the code and improve performance of database operations such as SELECT, UPDATE, and DELETE. Stored Procedures can be cached and used too.

What is the difference between Oracle package and procedure?

Stored Program Units (Procedures, Functions, and Packages) A stored procedure, function, or package is a PL/SQL program unit that: Has a name. ... The only difference between procedures and functions is that functions always return a single value to the caller, while procedures do not return a value to the caller.

What are Oracle procedures?

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.

How do I view stored procedures?

Expand Databases, expand the database in which the procedure belongs, and then expand Programmability. Expand Stored Procedures, right-click the procedure and then select Script Stored Procedure as, and then select one of the following: Create To, Alter To, or Drop and Create To. Select New Query Editor Window.

What are the types of trigger?

There are two types of triggers.

  • BEFORE trigger: – This trigger is called before the execution of the DML statement. ...
  • After Trigger: – this trigger is called after once DML statement is executed. ...
  • Combination of triggers: – We can have combination of row, statement, BEFORE and AFTER triggers.

Which is better view or stored procedure?

A view is essentially a saved SQL statement. Therefore, I would say that in general, a stored procedure will be likely to be faster than a view IF the SQL statement for each is the same, and IF the SQL statement can benefit from optimizations. Otherwise, in general, they would be similar in performance.

Which is better stored procedure or function?

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 main difference a function and a procedure?

A function is used to calculate result using given inputs. A procedure is used to perform certain task in order. A function can be called by a procedure. A procedure cannot be called by a function.

What is difference between function and procedure in Oracle?

7 Answers. The difference is- A function must return a value (of any type) by default definition of it, whereas in case of a procedure you need to use parameters like OUT or IN OUT parameters to get the results. You can use a function in a normal SQL where as you cannot use a procedure in SQL statements.

What are triggers in SQL?

A SQL trigger is a database object which fires when an event occurs in a database. We can execute a SQL query that will "do something" in a database when a change occurs on a database table such as a record is inserted or updated or deleted. For example, a trigger can be set on a record insert in a database table.

How do you create a procedure?

Get it Done: How to Write a Procedure in 8 Steps

  1. Spend some time observing. ...
  2. Create a template. ...
  3. Identify your task. ...
  4. Have a conversation with the key players. ...
  5. Write it all down. ...
  6. Take a test run. ...
  7. Revise and refine. ...
  8. Put the procedure in play.

How we can create a table through procedure?


  1. Create a table space and define it to the database before its first use.
  2. To create the table, issue either an SQL CREATE TABLE statement, a QMF DISPLAY command followed by a SAVE DATA command, or an IMPORT command.
  3. To improve Db2® performance, create one or more indexes on the tables you create.

What are triggers in Oracle?

A trigger is a named PL/SQL block stored in the Oracle Database and executed automatically when a triggering event takes place. The event can be any of the following: A data manipulation language (DML) statement executed against a table e.g., INSERT , UPDATE , or DELETE .

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