The document outlines an assignment to create an auditing policy using SQL Developer to track insertion and update activities in a customers table. It details the creation of the customers table and a corresponding history table, and includes steps to insert, update, and delete records, along with a trigger for auditing. The output should consist of trigger code, table creation, and record insertion codes, verified by displaying the contents of both tables.

1. Using SQL Developer ONLY!
Your assignment is to create an auditing policy that keep track of insertion and update activities
of Customers table. This Customers trigger fires before update or insert or delete on customers.
You have to test your trigger and provide screenshots to prove that it works correctly
D1. Create a new table named Customers. The new table should have at least 5 columns
including a primary key. (Cust-id, First_name, Last_name, State, Zip-code. Use cust_id as PK.
D2. Insert 2 rows into the Customers table.
D3. Create a history table for Customers table, (create table customers_history). The table should
have same structure as Customers table Cust-id + First_name + Last_name+ State + Zip_code.
Don’t forget the history_id as pk . Do NOT insert any data (values) into this table.
D4. Create a trigger for auditing—create trigger audit_customers on the table
D5. Insert 3 records into the Customers table.
D6. Update the first record of Customers, and then delete this record.
D7. Display the content of Customers table and the history table.
You have to provide the trigger code, code you used to create the table and insert records.
Solution
/** [D1]**/
CREATE TABLE Customers1 (
Cust_id Number (8),
First_name varchar2(20),
Last_name varchar2(20),
State varchar2 (20),
Zip_code Number (9),
Primary key (Cust_id)
);
/***[D2]***/
Insert into Customers1 values ( 1, 'David','Smith', 'Virginia', 300050);
Insert into Customers1 values ( 2, 'Vinsel', 'Nalla', 'NYK', 300051);
/**[D3]**/
CREATE TABLE Customers1_history (

2. history_id Number (8) ,
Cust_id Number (8),
First_name varchar2(20),
Last_name varchar2(20),
State varchar2 (20),
Zip_code Number (9),
Primary key (history_id)
);
/**** [D4]*********
I have used MErge concept for this.
Trigger invoke for each delete , update , insert statement on
Clients Table.
**************************/
create or replace
TRIGGER audit_Customers1
BEFORE INSERT OR UPDATE OR DELETE ON Customers1
BEGIN
MERGE INTO Customers1_history d
USING Customers1 s
ON (d.Cl_id = s.Cl_id)
WHEN MATCHED THEN
UPDATE SET d.Zip_code = s.Zip_code
WHEN NOT MATCHED THEN
Insert (d.History_id,d.Cl_id , d.F_name , d.L_name , d.State ,d.Zip_code )
values (s.cl_id, s.Cl_id , s.F_name , s.L_name , s.State ,s.Zip_code);
END audit_Customers1;
/*** [D5] ******/
Insert into Customers1 values ( 3, 'Thersa', 'john', 'Londan', 300152);
Insert into Customers1 values ( 4, 'rahul', 'modi', 'delhi', 300153);
Insert into Customers1 values ( 5, 'aamir', 'khan', 'Iran', 300154);
/**** [D6] ******/
UPDATE Customers1
SET Zip_code = 123456

3. WHERE Cust_id = 1;
DELETE FROM Customers1
WHERE Cust_id = 1;
/******** [D7] ********/
SELECT * FROM Customers1;
SELECT * FROM Customers1_history;