Stored procedure oracle - oracle tutorial - sql tutorial




What is procedure in Oracle ?

  • A procedure is a group of PL/SQL statements that can be called by name.
  • The call specification (sometimes called call spec) specifies a java method or a third-generation language routine so that it can be called from SQL and PL/SQL.

Oracle Procedure Query Execution

Oracle Procedure Query Execution

Create Procedure

Syntax

CREATE [OR REPLACE] PROCEDURE procedure_name
    [ (parameter [,parameter]) ]
IS
    [declaration_section]
BEGIN
    executable_section
[EXCEPTION
    exception_section]
END [procedure_name];
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  • Following are the three types of procedures that must be defined to create a procedure.
  • IN: It is a default parameter. It passes the value to the subprogram.
  • OUT: It must be specified. It returns a value to the caller.
  • IN OUT: It must be specified. It passes an initial value to the subprogram and returns an updated value to the caller.

Oracle Create procedure example

  • In this example, we are going to insert record in the "user" table. So you need to create user table first.

Table creation:

create table user(id number(10) primary key,name varchar2(100));
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  • Now write the procedure code to insert record in user table.

Procedure Code:

 create or replace procedure "INSERTUSER"  
(id IN NUMBER,  
name IN VARCHAR2)  
is  
begin  
insert into user values(id,name);  
end;  
/     
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Output:

Procedure created.

Oracle program to call procedure

  • Let's see the code to call above created procedure.
BEGIN  
   insertuser(101,'Rahul');
   dbms_output.put_line('record inserted successfully');  
END;  
/  
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  • Now, see the "USER" table, you will see one record is inserted.
ID Name
101 Smith

Oracle Drop Procedure

Syntax

DROP PROCEDURE procedure_name;
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Example to drop procedure

DROP PROCEDURE pro1;
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Oracle Stored Procedures Example

Oracle Stored Procedures Example

Stored Procedure Vs Functions

Stored Procedure Vs Functions

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