-- Create Geeks table
CREATE TABLE Geeks (
    Id INT,
    Name VARCHAR2(20),
    Score INT
);

-- Insert into Geeks Table 
INSERT INTO Geeks (Id, Name, Score) VALUES (1, 'Sam', 800);
INSERT INTO Geeks (Id, Name, Score) VALUES (2, 'Ram', 699);
INSERT INTO Geeks (Id, Name, Score) VALUES (3, 'Tom', 250);
INSERT INTO Geeks (Id, Name, Score) VALUES (4, 'Om', 350);
INSERT INTO Geeks (Id, Name, Score) VALUES (5, 'Jay', 750);
-- insert statement should be written for each entry in Oracle Sql Developer

CREATE TABLE Affect (
    Id INT,
    Name VARCHAR2(20),
    Score INT
);

-- BEFORE INSERT trigger
CREATE OR REPLACE TRIGGER BEFORE_INSERT
BEFORE INSERT ON Geeks
FOR EACH ROW
BEGIN
    INSERT INTO Affect (Id, Name, Score)
    VALUES (:NEW.Id, :NEW.Name, :NEW.Score);
END;
/
INSERT INTO Geeks (Id, Name, Score) VALUES (6, 'Arjun', 500);


select * from Geeks;
-- select * from Affect;

PL/SQL Online Compiler

Write, Run & Share PL/SQL code online using OneCompiler's Oracle PL/SQL online editor and compiler for free. It's one of the robust, feature-rich online editor and compiler for Oracle PL/SQL running on latest version 23c (23.3.0.0). Getting started with the OneCompiler's Oracle PL/SQL editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'PL/SQL' and start writing code to learn and test online without worrying about tedious process of installation.

About PL/SQL

PL/SQL is procedural extension for SQL created by Oracle. It is by default embedded into the Oracle Database. PL/SQL program units are compiled and stored inside the Oracle Database which results in optimal execution times as the PL/SQL and SQL run within the same server process.

Syntax help

Following is the syntax structure for the PL/SQL code blocks

DECLARE 
   <declarations section> 
BEGIN 
   <executable command(s)>
EXCEPTION 
   <exception handling> 
END;

Example

DECLARE 
   message  varchar2(100):= 'Hello, World!'; 
BEGIN 
   dbms_output.put_line(message); 
END; 
/

Named procedures

CREATE OR REPLACE FUNCTION 
hello_user
   (user_name IN VARCHAR2) 
    RETURN VARCHAR2
IS
BEGIN
   RETURN 'Hello ' || user_name;
END hello_user;
/

BEGIN
   dbms_output.put_line(hello_user('Peter'));
END;
/

Exception handling

BEGIN
  DBMS_OUTPUT.put_line (1/0);
EXCEPTION
  WHEN OTHERS
  THEN
    DBMS_OUTPUT.put_line ('error is: ' || SQLERRM);
END;