REQUEST COMPLIMENTARY SQLS*PLUS LICENCE
Oracle Procedures
Oracle Procedure is a subprogram that performs a specific action.
Learn how to create and delete procedures in Oracle / PLSQL with syntax and examples.
CREATE PROCEDURE
As with other programming languages, you can create your own procedures in Oracle.
Syntax
CREATE [OR REPLACE] PROCEDURE name_procedures
[ (parameter [, parameter, ...]) ] IS
[local ads]
BEGIN
executable offers
[EXCEPTION
exception handlers]
END [procedure_name];
When creating a procedure or function, you can define three types of parameters that can be declared:
- IN – A parameter can refer to a procedure or function. The value of the parameter cannot be changed by the procedure or function.
- OUT – The parameter cannot refer to a procedure or function, but the parameter value can be changed by the procedure or function.
- IN OUT – The parameter can reference the procedure or function and the parameter values can be changed by the procedure or function.
Example
Let’s look at an example of how to create a procedure in Oracle.
CREATE OR REPLACE Procedure UpdateCourse
( name_in IN varchar2 )
IS
cnumber number;
cursor c1 is
SELECT course_number
FROM courses_tbl
WHERE course_name = name_in;
BEGIN
open c1;
fetch c1 into cnumber;
if c1%notfound then
cnumber := 9999;
end if;
INSERT INTO student_courses
( course_name,
course_number )
VALUES
( name_in,
cnumber );
commit;
close c1;
EXCEPTION
WHEN OTHERS THEN
raise_application_error(-20001,'An error was encountered - '||SQLCODE|' -ERROR- '||SQLERRM);
END;
| This procedure is called the UpdateCourse. It has one parameter, called name_in. The procedure will search for course_number by the value of course_name. If the search is unsuccessful, then course_number is 99999 by default. Then a new record is inserted into the student_courses table. |
DROP PROCEDURE
Once you have created your Oracle procedure, you may need to remove it from the database.
Syntax for deleting the procedure in Oracle
DROP PROCEDURE procedure_name;
- procedure_name – is the name of the procedure you want to delete.
Example: .
Let’s take a look at an example of how to remove a procedure in Oracle.
DROP PROCEDURE UpdateCourse;
In this example, we remove a procedure called UpdateCourse.
Oracle PL/SQL Procedures: CREATE and DROP
MORE NEWS
PreambleNoSql is not a replacement for SQL databases but is a valid alternative for many situations where standard SQL is not the best approach for...
PreambleMongoDB Conditional operators specify a condition to which the value of the document field shall correspond.Comparison Query Operators $eq...
5 Database management trends impacting database administrationIn the realm of database management systems, moreover half (52%) of your competitors feel...
The data type is defined as the type of data that any column or variable can store in MS SQL Server. What is the data type? When you create any table or...
PreambleMS SQL Server is a client-server architecture. MS SQL Server process starts with the client application sending a query.SQL Server accepts,...
First the basics: what is the master/slave?One database server (“master”) responds and can do anything. A lot of other database servers store copies of all...
PreambleAtom Hopper (based on Apache Abdera) for those who may not know is an open-source project sponsored by Rackspace. Today we will figure out how to...
PreambleMongoDB recently introduced its new aggregation structure. This structure provides a simpler solution for calculating aggregated values rather...
FlexibilityOne of the most advertised features of MongoDB is its flexibility. Flexibility, however, is a double-edged sword. More flexibility means more...
PreambleSQLShell is a cross-platform command-line tool for SQL, similar to psql for PostgreSQL or MySQL command-line tool for MySQL.Why use it?If you...
PreambleWriting an application on top of the framework on top of the driver on top of the database is a bit like a game on the phone: you say “insert...
PreambleOracle Coherence is a distributed cache that is functionally comparable with Memcached. In addition to the basic function of the API cache, it...
PreambleIBM pureXML, a proprietary XML database built on a relational mechanism (designed for puns) that offers both relational ( SQL / XML ) and...
What is PostgreSQL array? In PostgreSQL we can define a column as an array of valid data types. The data type can be built-in, custom or enumerated....
PreambleIf you are a Linux sysadmin or developer, there comes a time when you need to manage an Oracle database that can work in your environment.In this...
PreambleStarting with Microsoft SQL Server 2008, by default, the group of local administrators is no longer added to SQL Server administrators during the...