From e7d163a5d17445aa30b43984b9d9c7b6de3a6a84 Mon Sep 17 00:00:00 2001
From: "github-classroom[bot]"
 <66690702+github-classroom[bot]@users.noreply.github.com>
Date: Sun, 28 May 2023 12:21:53 +0000
Subject: [PATCH 1/7] Setting up GitHub Classroom Feedback


From 9d3b23e998820229de77742b8d281df6d1f367c0 Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Wed, 31 May 2023 09:30:27 +0600
Subject: [PATCH 2/7] Added DDL,DML and PL/SQl file

---
 bookShopPLSQL.sql | 138 ++++++++++++++++++++++++++++++++++++++++++++
 bookshopDDL.sql   |  88 ++++++++++++++++++++++++++++
 bookshopDML.sql   | 144 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 370 insertions(+)
 create mode 100644 bookShopPLSQL.sql
 create mode 100644 bookshopDDL.sql
 create mode 100644 bookshopDML.sql

diff --git a/bookShopPLSQL.sql b/bookShopPLSQL.sql
new file mode 100644
index 0000000..b80fc3f
--- /dev/null
+++ b/bookShopPLSQL.sql
@@ -0,0 +1,138 @@
+--printing name and email from customers (Basic pl/sql structure)
+set serveroutput on
+declare cus_name customers.customer_name%type;
+email varchar(50);
+begin
+    select customer_name, email into cus_name,email from customers where customer_id = 5001;
+    dbms_output.put_line('Name:' || cus_name || ' Email:'||email);
+end;
+/
+
+--use of rowtype
+set serveroutput on
+declare orders_row ORDERS%rowtype;
+begin 
+    select order_id into orders_row.order_id from orders where order_id = 7001;
+    dbms_output.put_line('id:' || orders_row.order_id );
+end;
+/
+
+
+
+--insert or set default value
+set serveroutput on
+declare
+    order_id ORDERS.ORDER_ID%type:=7010;
+    product_id ORDERS.PRODUCT_ID%type := 3001;
+    customer_id Orders.Customer_id%type := 5001;
+    quantity ORDERS.QUANTITY%type := 2;
+    
+begin
+    INSERT INTO orders (order_id, product_id, customer_id, quantity) VALUES (order_id, product_id, customer_id, quantity);
+end;
+/
+
+--cursor
+set serveroutput on 
+declare
+cursor c is select * from customers;
+c_row customers%rowtype;
+begin
+ open c;
+ fetch c into c_row.customer_id,c_row.customer_name,c_row.address,c_row.phone,c_row.email;
+ dbms_output.put_line('id:'|| c_row.customer_id || ' name:'||c_row.customer_name);
+ close c;
+end;
+/
+
+--cursor with loop
+set serveroutput on 
+declare
+cursor c is select * from customers;
+c_row customers%rowtype;
+begin
+ open c;
+ fetch c into c_row.customer_id,c_row.customer_name,c_row.address,c_row.phone,c_row.email;
+ while c%found loop
+ dbms_output.put_line('id:'|| c_row.customer_id || ' name:'||c_row.customer_name);
+ dbms_output.put_line('row_count: ' || c%rowcount);
+ fetch c into c_row.customer_id,c_row.customer_name,c_row.address,c_row.phone,c_row.email; 
+ end loop;
+ close c;
+end;
+/
+
+--array
+set serveroutput on
+declare
+i number;
+c_name customers.customer_name%type;
+TYPE NAMEARRAY is VARRAY(5) of CUSTOMERS.CUSTOMER_NAME%type;
+myarray NAMEARRAY:= NAMEARRAY();
+
+begin
+i:= 1;
+for x in 5001..5005
+loop 
+    select customer_name into c_name from customers where customer_id = x;
+    myarray.EXTEND();
+    myarray(i):= c_name;
+    i:=i+1;
+end loop;
+
+i:=1;
+while i<=myarray.count
+loop
+    dbms_output.put_line(myarray(i));
+    i:=i+1;
+end loop;
+end;
+/
+
+--array with extend function
+set serveroutput on
+declare
+i number;
+c_name customers.customer_name%type;
+TYPE NAMEARRAY is VARRAY(5) of CUSTOMERS.CUSTOMER_NAME%type;
+myarray NAMEARRAY:= NAMEARRAY('Customer 1','Customer 2','Customer 3','Customer 4','Customer 5');
+
+begin
+i:= 1;
+for x in 5001..5005
+loop 
+    select customer_name into c_name from customers where customer_id = x;
+    myarray(i):= c_name;
+    i:=i+1;
+end loop;
+
+i:=1;
+while i<=myarray.count
+loop
+    dbms_output.put_line(myarray(i));
+    i:=i+1;
+end loop;
+end;
+/
+
+--if/else
+set serveroutput on;
+declare
+i number;
+product_id PRODUCTS.PRODUCT_ID%type;
+seller_id PRODUCTS.SELLER_ID%type;
+begin
+    i:=1;
+    for x in 3001..3015
+    loop
+        select product_id,seller_id into product_id,seller_id from products where product_id = x;
+        IF seller_id = 1001 then
+            dbms_output.put_line(product_id || ' sold by ABC Books');
+        ELSIF seller_id = 1002 then
+            dbms_output.put_line(product_id || ' sold by XYZ Bookstore');
+        else
+            dbms_output.put_line(product_id || ' sold by other sellers'); 
+    end if;   
+    end loop;
+end;
+/
\ No newline at end of file
diff --git a/bookshopDDL.sql b/bookshopDDL.sql
new file mode 100644
index 0000000..5a5c554
--- /dev/null
+++ b/bookshopDDL.sql
@@ -0,0 +1,88 @@
+drop table orders;
+drop table products;
+drop table books;
+drop table sellers;
+drop table customers;
+drop view allProducts;
+drop view orderList;
+
+create table books(
+    id NUMBER PRIMARY KEY,
+    title varchar(50) not null,
+    author varchar(20) not null,
+    category varchar(20)
+);
+
+create table sellers(
+    Seller_id number primary key,
+    seller_name varchar(30) not null,
+    phone NUMBER not null,
+    email varchar(30)
+);
+
+create table customers(
+    customer_id number PRIMARY key,
+    customer_name varchar(30),
+    address VARCHAR(50),
+    phone number,
+    email varchar(30)
+);
+
+create table products (
+    product_id number primary key,
+    book_id number not null,
+    seller_id number not null,
+    price number not null check (price>0),
+    count number not null check (count>=0),
+    FOREIGN key (book_id) references books(id),
+    FOREIGN key (seller_id) REFERENCEs sellers(seller_id)
+);
+
+CREATE TABLE orders (
+    order_id NUMBER PRIMARY KEY,
+    order_date date DEFAULT SYSDATE,
+    product_id NUMBER NOT NULL,
+    customer_id NUMBER NOT NULL,
+    quantity NUMBER CHECK (quantity > 0),
+    total_price NUMERIC(6,2),
+    status VARCHAR(20) DEFAULT 'In progress' CHECK (status IN ('In progress', 'Shipped', 'Delivered')),
+    FOREIGN KEY (product_id) REFERENCES products(product_id),
+    FOREIGN KEY (customer_id) REFERENCES customers(customer_id)
+);
+
+-- Creating trigger to update total_price
+CREATE OR REPLACE TRIGGER update_total_price
+BEFORE INSERT OR UPDATE ON orders
+FOR EACH ROW
+BEGIN
+        SELECT price * :NEW.quantity
+        INTO :NEW.total_price
+        FROM products
+        WHERE product_id = :NEW.product_id;
+END;
+/
+
+-- Checking Availabity when placing order
+CREATE OR REPLACE TRIGGER place_order
+BEFORE INSERT ON orders
+FOR EACH ROW
+DECLARE
+    product_quantity NUMBER;
+BEGIN
+    SELECT count
+    INTO product_quantity
+    FROM products
+    WHERE product_id = :NEW.product_id;
+
+    IF product_quantity < :NEW.quantity THEN
+        RAISE_APPLICATION_ERROR(-20001, 'Cannot place order. Stock out.');
+    ELSE
+        UPDATE products
+        SET count = count - :NEW.quantity
+        WHERE product_id = :NEW.product_id;
+    END IF;
+END;
+/
+
+
+
diff --git a/bookshopDML.sql b/bookshopDML.sql
new file mode 100644
index 0000000..95fba40
--- /dev/null
+++ b/bookshopDML.sql
@@ -0,0 +1,144 @@
+INSERT INTO books (id, title, author, category) VALUES
+(1, 'To Kill a Mockingbird', 'Harper Lee', 'Fiction');
+INSERT INTO books (id, title, author, category) VALUES
+(2, '1984', 'George Orwell', 'Science Fiction');
+INSERT INTO books (id, title, author, category) VALUES
+(3, 'Pride and Prejudice', 'Jane Austen', 'Romance');
+INSERT INTO books (id, title, author, category) VALUES
+(4, 'The Great Gatsby', 'F. Scott Fitzgerald', 'Classic');
+INSERT INTO books (id, title, author, category) VALUES
+(5, 'Harry Potter and the Sorcerer''s Stone', 'J.K. Rowling', 'Fantasy');
+INSERT INTO books (id, title, author, category) VALUES
+(6, 'The Catcher in the Rye', 'J.D. Salinger', 'Fiction');
+INSERT INTO books (id, title, author, category) VALUES
+(7, 'To the Lighthouse', 'Virginia Woolf', 'Classic');
+INSERT INTO books (id, title, author, category) VALUES
+(8, 'The Hobbit', 'J.R.R. Tolkien', 'Fantasy');
+INSERT INTO books (id, title, author, category) VALUES
+(9, 'The Alchemist', 'Paulo Coelho', 'Self-Help');
+INSERT INTO books (id, title, author, category) VALUES
+(10, 'The Odyssey', 'Homer', 'Classic');
+
+
+INSERT INTO sellers (Seller_id, seller_name, phone, email) VALUES
+(1001, 'ABC Books', '1234567890', 'abcbooks@example.com');
+INSERT INTO sellers (Seller_id, seller_name, phone, email) VALUES
+(1002, 'XYZ Bookstore', '9876543210', 'xyzbookstore@example.com');
+INSERT INTO sellers (Seller_id, seller_name, phone, email) VALUES
+(1003, 'Book Haven', '5555555555', 'bookhaven@example.com');
+INSERT INTO sellers (Seller_id, seller_name, phone, email) VALUES
+(1004, 'Readers Paradise', '9999999999', 'readersparadise@example.com');
+INSERT INTO sellers (Seller_id, seller_name, phone, email) VALUES
+(1005, 'Bookworm Emporium', '1111111111', 'bookwormemporium@example.com');
+
+
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5001, 'John Doe', '123 Main St, City', '9832103210', 'johndoe@example.com');
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5002, 'Jane Smith', '456 Oak St, Town', '5598754378', 'janesmith@example.com');
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5003, 'Mike Johnson', '789 Elm St, Village', '4321567890', 'mikejohnson@example.com');
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5004, 'Emily Davis', '789 Walnut St, Town', '5673349999', 'emilydavis@example.com');
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5005, 'David Wilson', '321 Pine St, City', '1156731111', 'davidwilson@example.com');
+INSERT INTO customers (customer_id, customer_name, address, phone, email) VALUES
+(5006, 'Sherlock Holmes', '221B Becker St, City', '198456721', 'sherlockholmes@detective.com');
+
+
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3001, 1, 1001, 20.99, 50);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3002, 2, 1002, 15.99, 30);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3003, 3, 1003, 12.50, 20);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3004, 4, 1004, 18.75, 15);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3005, 5, 1005, 9.99, 40);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3006, 6, 1001, 9.99, 25);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3007, 7, 1002, 14.50, 15);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3008, 8, 1003, 19.99, 35);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3009, 9, 1004, 10.99, 50);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3010, 10, 1005, 8.99, 10);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3011, 1, 1005, 25.50, 20);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3012, 2, 1003, 12.75, 30);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3013, 3, 1004, 7.99, 45);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3014, 4, 1002, 16.99, 5);
+INSERT INTO products (product_id, book_id, seller_id, price, count) VALUES
+(3015, 5, 1001, 11.50, 25);
+
+
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7001, 3001, 5001, 2,date '2023-05-25');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7002, 3002, 5002, 1,date '2023-03-21');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7003, 3003, 5003, 3,date '2023-05-15');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7004, 3004, 5004, 1,date '2023-04-20');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7008, 3014, 5004, 2,date '2023-05-18');
+INSERT INTO orders (order_id, product_id, customer_id, quantity) VALUES (7005, 3005, 5002, 4);
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7006, 3003, 5005, 4,date '2023-05-15');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7007, 3013, 5004, 5,date '2023-04-28');
+INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7009, 3005, 5005, 2,date '2023-05-10');
+
+
+
+
+--Show table name
+select table_name from user_tables;
+
+--Basic Update Query
+update orders set status = 'Shipped' where order_date< date '2023-05-24';
+UPDATE orders SET status = 'Delivered' WHERE EXTRACT(MONTH FROM order_date) < 5;
+
+--Basic Select Query with where condition
+select * from customers where customer_id=5001;
+
+--Select query (Nested)
+Select * from books where id = (select book_id from products where product_id = (select product_id from orders where order_id = 7001));
+
+--Aggregate function
+--total_sell of this shop
+select SUM(total_price) from orders;
+
+--the product which has earns highest money
+select product_id,tot from(select product_id,sum(total_price) as tot from orders group by product_id)
+where tot = 
+(select max(sum(total_price)) from orders group by product_id);
+
+--using having
+select product_id,sum(total_price) as total_sell from orders group by product_id having sum(total_price) = (select max(sum(total_price)) from orders group by product_id);
+
+--the customer who hasn't ordered any product yet (using in)
+select * from customers where customer_id not in (select customer_id from orders);
+
+--string operation
+select * from customers where email like '%@example.com';
+
+--exist (those customer who has ordered 2 or quantity.
+select * from customers where exists (select * from orders where quantity >2 and orders.customer_id=customers.customer_id);
+
+--natural join
+select * from orders natural join customers;
+
+--join
+select * from orders join customers on orders.customer_id=customers.customer_id;
+
+--Creating View of AllProducts
+create view allProducts as 
+    select products.product_id,books.title,products.price,sellers.seller_name,products.count as stock from 
+    books join products on books.id = products.book_id join sellers on sellers.seller_id= products.seller_id;
+
+--Creating view of orderList
+create view OrderList as 
+    select orders.order_id, allProducts.title,allproducts.price,orders.quantity,orders.total_price,
+    customers.customer_name,allproducts.seller_name, orders.status, orders.order_date from 
+    allProducts join orders on allProducts.product_id = orders.product_id 
+    join customers on customers.customer_id = orders.customer_id;
\ No newline at end of file

From 2700de3ad37444cbf5efc0559bb410cfd6a6a5cd Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Wed, 31 May 2023 09:51:28 +0600
Subject: [PATCH 3/7] Update bookShopPLSQL.sql with function and procedure

---
 bookShopPLSQL.sql | 59 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/bookShopPLSQL.sql b/bookShopPLSQL.sql
index b80fc3f..4380575 100644
--- a/bookShopPLSQL.sql
+++ b/bookShopPLSQL.sql
@@ -135,4 +135,61 @@ begin
     end if;   
     end loop;
 end;
-/
\ No newline at end of file
+/
+
+--simple procedure for printing customer name according to customer_id (IN)
+
+create or replace procedure proc(var1 in customers.customer_id%type) is
+var2 varchar2(30);
+begin
+select customer_name into var2 from customers where customer_id = var1;
+dbms_output.put_line('customer name:'|| var2);
+end;
+/
+
+set serveroutput on
+declare 
+begin
+proc(5005);
+end;
+/
+
+
+--in out
+
+create or replace procedure proc2(varId in customers.customer_id%type, varName out customers.customer_name%type,varEmail out customers.email%type) is
+begin
+select customer_name,email into varName,varEmail from customers where customer_id = varId;
+end;
+/
+
+set serveroutput on
+declare 
+cName Customers.customer_name%type;
+cEmail CUSTOMERS.EMAIL%type;
+begin
+proc2(5005,CName,CEmail);
+dbms_output.put_line('Name:'||cName || ' Email: '||cEmail);
+end;
+/
+
+--function (take input of a customer id and print his email)
+create or replace function func(varId in Customers.customer_id%type) return varchar as
+cName customers.customer_NAME%type;
+begin
+select customer_NAME into cName from customers where customer_id = varId;
+return cName;
+end;
+/
+
+
+set serveroutput on
+declare 
+cName customers.customer_name%type;
+cEmail customers.Email%type;
+begin
+cName:=func(5001);
+select email into cEmail from customers where customer_name = cName;
+dbms_output.put_line('Email: '||cEmail);
+end;
+/

From df710e68a52cf084bd871265fadbe4fb931789ec Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Wed, 31 May 2023 10:01:27 +0600
Subject: [PATCH 4/7] Update bookshopDDL.sql

---
 bookshopDDL.sql | 2 --
 1 file changed, 2 deletions(-)

diff --git a/bookshopDDL.sql b/bookshopDDL.sql
index 5a5c554..17c60cd 100644
--- a/bookshopDDL.sql
+++ b/bookshopDDL.sql
@@ -3,8 +3,6 @@ drop table products;
 drop table books;
 drop table sellers;
 drop table customers;
-drop view allProducts;
-drop view orderList;
 
 create table books(
     id NUMBER PRIMARY KEY,

From 2ab3a56f3ce08c3a8b91f5222ee869035f6ea3d9 Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Wed, 31 May 2023 10:01:40 +0600
Subject: [PATCH 5/7] Update bookshopDML.sql

---
 bookshopDML.sql | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/bookshopDML.sql b/bookshopDML.sql
index 95fba40..831d93b 100644
--- a/bookshopDML.sql
+++ b/bookshopDML.sql
@@ -88,7 +88,8 @@ INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALU
 INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7007, 3013, 5004, 5,date '2023-04-28');
 INSERT INTO orders (order_id, product_id, customer_id, quantity,order_date) VALUES (7009, 3005, 5005, 2,date '2023-05-10');
 
-
+drop view allProducts;
+drop view orderList;
 
 
 --Show table name
@@ -141,4 +142,4 @@ create view OrderList as
     select orders.order_id, allProducts.title,allproducts.price,orders.quantity,orders.total_price,
     customers.customer_name,allproducts.seller_name, orders.status, orders.order_date from 
     allProducts join orders on allProducts.product_id = orders.product_id 
-    join customers on customers.customer_id = orders.customer_id;
\ No newline at end of file
+    join customers on customers.customer_id = orders.customer_id;

From 538fad5ca9a48ef20afda01781d0eac8403e2a55 Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Fri, 2 Jun 2023 14:12:05 +0600
Subject: [PATCH 6/7] Create README.md

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 README.md

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..162af20
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+Project Name: BookShop
+Created by : Abdulla Rahman
+Roll: 1907030

From 5c51bd08e7aa5505415757fdc9792ce4740110f4 Mon Sep 17 00:00:00 2001
From: Abdulla Rahman <121899502+abdulla30r@users.noreply.github.com>
Date: Wed, 28 Jun 2023 14:01:55 +0600
Subject: [PATCH 7/7] Update bookShopPLSQL.sql

---
 bookShopPLSQL.sql | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/bookShopPLSQL.sql b/bookShopPLSQL.sql
index 4380575..5378a5c 100644
--- a/bookShopPLSQL.sql
+++ b/bookShopPLSQL.sql
@@ -193,3 +193,40 @@ select email into cEmail from customers where customer_name = cName;
 dbms_output.put_line('Email: '||cEmail);
 end;
 /
+
+
+--Trigger
+
+-- Creating trigger to update total_price
+CREATE OR REPLACE TRIGGER update_total_price
+BEFORE INSERT OR UPDATE ON orders
+FOR EACH ROW
+BEGIN
+        SELECT price * :NEW.quantity
+        INTO :NEW.total_price
+        FROM products
+        WHERE product_id = :NEW.product_id;
+END;
+/
+
+-- Checking Availabity when placing order
+CREATE OR REPLACE TRIGGER place_order
+BEFORE INSERT ON orders
+FOR EACH ROW
+DECLARE
+    product_quantity NUMBER;
+BEGIN
+    SELECT count
+    INTO product_quantity
+    FROM products
+    WHERE product_id = :NEW.product_id;
+
+    IF product_quantity < :NEW.quantity THEN
+        RAISE_APPLICATION_ERROR(-20001, 'Cannot place order. Stock out.');
+    ELSE
+        UPDATE products
+        SET count = count - :NEW.quantity
+        WHERE product_id = :NEW.product_id;
+    END IF;
+END;
+/