Database-Lab-Exam/labtest_b2.html at main · Jesiara/Database-Lab-Exam · GitHub

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<!DOCTYPE html>
<html>

<head>
	<title>Lab Test 01</title>
	<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
	<style>
		body {
			font-family: Arial, sans-serif;
			margin: 0;
			padding: 0;
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		h1,
		h2,
		ol,
		ul,
		p {
			margin-top: 20px;
			margin-bottom: 10px;
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		h1 {
			background-color: #333;
			color: #fff;
			padding: 10px;
			text-align: center;
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		h2 {
			font-size: 22px;
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		ul {
			list-style-type: disc;
			margin-left: 30px;
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		ol {
			list-style-type: decimal;
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			margin-bottom: 5px;
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			display: grid;
			height: 100vh;
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	</style>
</head>

<body>
	<h1>CSE 3110: Database Systems Laboratory - Lab Test 01 <br>
		Time: 30 min
	</h1>
	<div style="max-width: 800px; margin: 0 auto;">
		<h2>Table Description</h2>
		<table>
			<tr>
				<th>Table Name</th>
				<th>Columns</th>
			</tr>
			<tr>
				<td>Customer</td>
				<td>ID<br>Name<br>Contact</td>
			</tr>
			<tr>
				<td>Goods</td>
				<td>Goods_ID<br>Goods_Name<br>Price</td>
			</tr>
			<tr>
				<td>Order</td>
				<td>Order_Date<br>Customer_ID<br>Goods_ID</td>
			</tr>
		</table>
		<ul>
			<li>Make ID and GOODS_ID as the primary key and don’t allow the columns to take NULL values.
			</li>
			<li>Make CUSTOMER_ID and GOODS_ID the foreign key of Order table referencing ID of Customer and GOODS_ID of
				Goods table respectively</li>
			<li>Apply some domain integrity techniques so that you can’t put negative value in the PRICE column of Goods
				table.</li>
			<li>Apply some domain integrity techniques so that if you delete a record in the customer table, related
				records in Order table will automatically deleted.</li>
		</ul>
		<div class="container my-5">
			<div class="row">
				<div class="col-md-17 mx-auto">
					<div class="pre-scrollable">
						<pre>
					CREATE TABLE Customer (
					ID INT NOT NULL PRIMARY KEY,
					Name VARCHAR(50) NOT NULL,
					Contact VARCHAR(50) NOT NULL
					);

					CREATE TABLE Goods (
					Goods_ID INT NOT NULL PRIMARY KEY,
					Goods_Name VARCHAR(50) NOT NULL,
					Price DECIMAL(10, 2) NOT NULL CHECK (Price >= 0)
					);
					CREATE TABLE Order (
					Order_Date DATE NOT NULL,
					Customer_ID INT NOT NULL,
					Goods_ID INT NOT NULL,
					PRIMARY KEY (Customer_ID, Goods_ID),
					FOREIGN KEY (Customer_ID) REFERENCES Customer(ID) ON DELETE CASCADE,
					FOREIGN KEY (Goods_ID) REFERENCES Goods(Goods_ID) ON DELETE CASCADE
					);
				  </pre>
					</div>
				</div>
			</div>
		</div>

		<h2>Queries</h2>
		<table>
			<thead>
				<tr>
					<th>Question</th>

				</tr>
			</thead>
			<tbody>
				<tr>
					<td>Insert minimum three rows in above tables.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
											INSERT INTO Customer (ID, Name, Contact, Address)
											VALUES (1, 'John Doe', '555-1234', '123 Main St');

											INSERT INTO Customer (ID, Name, Contact, Address)
											VALUES (2, 'Jane Smith', '555-5678', '456 Oak Ave');

											INSERT INTO Customer (ID, Name, Contact, Address)
											VALUES (3, 'Bob Johnson', '555-9012', '789 Elm St');

											INSERT INTO Customer (ID, Name, Contact, Address)
											VALUES (4, 'Alice Brown', '555-3456', '321 Pine St');

											-- Insert data into the Goods table
											INSERT INTO Goods (Goods_ID, Goods_Name, Price)
											VALUES (1, 'Widget', 10.99);

											INSERT INTO Goods (Goods_ID, Goods_Name, Price)
											VALUES (2, 'Gadget', 19.99);

											INSERT INTO Goods (Goods_ID, Goods_Name, Price)
											VALUES (3, 'Thingamajig', 8.99);

											INSERT INTO Goods (Goods_ID, Goods_Name, Price)
											VALUES (4, 'Doohickey', 14.99);

											-- Insert data into the Order table
											INSERT INTO Order (Order_Date, Customer_ID, Goods_ID)
											VALUES ('2023-03-19', 1, 1);

											INSERT INTO Order (Order_Date, Customer_ID, Goods_ID)
											VALUES ('2023-03-20', 1, 2);

											INSERT INTO Order (Order_Date, Customer_ID, Goods_ID)
											VALUES ('2023-03-21', 2, 3);

											INSERT INTO Order (Order_Date, Customer_ID, Goods_ID)
											VALUES ('2023-03-22', 3, 4);
								  </pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>To retrieve the names of all goods that have the letter "i" in their name and the customer's
						name contains the letter "j". <br>
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
											SELECT g.Goods_Name FROM Goods g
											JOIN Order o ON g.Goods_ID = o.Goods_ID
											JOIN Customer c ON o.Customer_ID = c.ID
											WHERE g.Goods_Name LIKE '%i%'
											AND c.Name LIKE '%j%';
								  </pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>Find the total number of customers in the Customer table and the details of the customer with ID
						102, including their contact number.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
											SELECT COUNT(*) as total_customers, Name, Contact FROM Customer
											WHERE ID = 102;
								  </pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>Retrieve the name and contact information of all customers who have purchased the goods with the
						lowest price in the Goods table.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-19 mx-auto">
									<div class="pre-scrollable">
										<pre>
											SELECT C.Name, C.Contact
											FROM Customer C
											JOIN Order O ON C.ID = O.Customer_ID
											JOIN (SELECT MIN(Price)
											as min_price FROM Goods) G ON G.min_price =
											(SELECT Price FROM Goods WHERE Goods_ID = O.Goods_ID)
								  </pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>Find the customers who have not placed any orders yet.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
						SELECT C.Name, C.Contact
						FROM Customer C
						WHERE C.ID NOT IN (SELECT DISTINCT Customer_ID FROM Order)
					</pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>Find the name of the customer who placed the most expensive order.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
						SELECT c.Name
						FROM Customer c
						JOIN Order o ON c.ID = o.Customer_ID
						JOIN Goods g ON g.Goods_ID = o.Goods_ID
						WHERE g.Price = (SELECT MAX(Price) FROM Goods)
						ORDER BY g.Price DESC
						LIMIT 1;
					</pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>List all customers who have made more than 2 orders.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>

						SELECT c.Name, COUNT(*) as num_orders
						FROM Customer c
						JOIN Order o ON c.ID = o.Customer_ID
						GROUP BY c.ID
						HAVING COUNT(*) > 2;
					</pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
				<tr>
					<td>Drop the three tables.
						<div class="container my-3">
							<div class="row">
								<div class="col-md-16 mx-auto">
									<div class="pre-scrollable">
										<pre>
						DROP TABLE IF EXISTS Order;
						DROP TABLE IF EXISTS Goods;
						DROP TABLE IF EXISTS Customer;
					</pre>
									</div>
								</div>
							</div>
						</div>
					</td>

				</tr>
			</tbody>
		</table>

	</div>
	<div>
		<div id="app"></div>
	</div>
	<script>
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		const WARNING_THRESHOLD = 10;
		const ALERT_THRESHOLD = 5;

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				color: "green"
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				color: "red",
				threshold: ALERT_THRESHOLD
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