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10_stored_routines_as_functions/script.sql

@@ -1 +1,19 @@
--- Write your SQL code here
+-- Count the total number of orders handled by the employee
+DELIMITER //
+
+CREATE FUNCTION calc_total_orders_by_employee(employee_id INT)
+RETURNS INT
+DETERMINISTIC
+BEGIN
+    DECLARE total_orders INT;
+
+
+    SELECT COUNT(*) INTO total_orders
+    FROM Order
+    WHERE employee_id = employee_id;
+
+    RETURN total_orders;
+END;
+//
+
+DELIMITER ;

11_views/script.sql

@@ -1 +1,14 @@
--- Write your SQL code here
+-- Write your SQL code here
+-- see the order details along with customer information(history):
+
+CREATE VIEW ClientOrderHistory AS
+SELECT c.customer_name, o.order_id, o.order_date, o.order_quantity, p.product_name
+FROM Order o
+JOIN Customer c ON o.customer_id = c.customer_id
+JOIN Product p ON o.product_id = p.product_id;
+
+-- View to show employee performance overview
+CREATE VIEW EmployeePerformanceOverview AS
+SELECT e.employee_name, e.employee_role, e.performance_rating, d.department_name
+FROM Employee e
+JOIN Department d ON e.department_id = d.department_id;

12_database_transactions/script.sql

@@ -1 +1,10 @@
--- Write your SQL code here
+-- Create a transaction that handles order placement
+START TRANSACTION;
+
+INSERT INTO Order (order_id, order_quantity, order_date, customer_id)
+VALUES (101, 2, '2024-11-20', 1);
+
+INSERT INTO Payments (payment_id, order_id, amount_paid)
+VALUES (1001, 101, 200);
+
+COMMIT;

3_normal_triggers/script.sql

@@ -1 +1,23 @@
--- Write your SQL code here
+-- Trigger to set order status to "Pending Payment" after a new order is created
+DELIMITER //
+CREATE TRIGGER trg_set_order_status
+AFTER INSERT ON Order
+FOR EACH ROW
+BEGIN
+    UPDATE Order
+    SET order_status = 1 -- Pending Payment
+    WHERE order_id = NEW.order_id;
+END //
+DELIMITER ;
+
+-- Trigger to validate employee performance rating before insert/update
+DELIMITER //
+CREATE TRIGGER trg_check_employee_performance
+BEFORE INSERT OR UPDATE ON Employee
+FOR EACH ROW
+BEGIN
+    IF NEW.performance_rating > 5 OR NEW.performance_rating < 1 THEN
+        SIGNAL SQLSTATE '45000' SET MESSAGE_TEXT = 'Performance rating must be between 1 and 5';
+    END IF;
+END //
+DELIMITER ;

4_check_constraints/script.sql

@@ -1 +1,55 @@
--- Write your SQL code here
+--Tables Without Check Constraints
+CREATE TABLE Department (
+    department_id INT AUTO_INCREMENT PRIMARY KEY,
+    department_name VARCHAR(100) NOT NULL,
+    location VARCHAR(100) NOT NULL,
+    department_head VARCHAR(100) NOT NULL
+) ENGINE=InnoDB;
+
+CREATE TABLE Employee (
+    employee_id INT AUTO_INCREMENT PRIMARY KEY,
+    employee_name VARCHAR(100) NOT NULL,
+    employee_role VARCHAR(100) NOT NULL,
+    department_id INT NOT NULL,
+    FOREIGN KEY (department_id) REFERENCES Department(department_id),
+    INDEX (department_id)
+) ENGINE=InnoDB;
+
+CREATE TABLE Customer (
+    customer_id INT AUTO_INCREMENT PRIMARY KEY,
+    customer_name VARCHAR(100) NOT NULL,
+    customer_email VARCHAR(100) NOT NULL UNIQUE
+) ENGINE=InnoDB;
+
+CREATE TABLE Order (
+    order_id INT AUTO_INCREMENT PRIMARY KEY,
+    order_quantity INT NOT NULL,
+    order_date DATETIME NOT NULL,
+    customer_id INT,
+    FOREIGN KEY (customer_id) REFERENCES Customer(customer_id)
+) ENGINE=InnoDB;
+
+CREATE TABLE Product (
+    product_id INT AUTO_INCREMENT PRIMARY KEY,
+    product_name VARCHAR(100) NOT NULL,
+    product_quantity INT NOT NULL,
+    product_price DECIMAL(10, 2)
+) ENGINE=InnoDB;
+
+
+--Tables With Check Constraints
+
+CREATE TABLE Product (
+    product_id INT AUTO_INCREMENT PRIMARY KEY,
+    product_name VARCHAR(100) NOT NULL,
+    product_quantity INT NOT NULL CHECK (product_quantity >= 0),
+    product_price DECIMAL(10, 2) NOT NULL CHECK (product_price > 0)
+) ENGINE=InnoDB;
+
+CREATE TABLE Order(
+    order_id INT AUTO_INCREMENT PRIMARY KEY,
+    order_quantity INT NOT NULL CHECK (order_quantity > 0),
+    order_date DATE NOT NULL,
+    customer_id INT NOT NULL,
+    FOREIGN KEY (customer_id) REFERENCES Customer(customer_id),
+) ENGINE=InnoDB;

5_temporal_triggers/script.sql

@@ -1 +1,24 @@
--- Write your SQL code here
+-- Write your SQL code here
+-- Trigger to update inventory levels after order dispatch
+DELIMITER //
+CREATE TRIGGER trg_update_inventory_after_dispatch
+AFTER UPDATE ON `Order`
+FOR EACH ROW
+BEGIN
+    IF NEW.dispatch_date IS NOT NULL AND OLD.dispatch_date IS NULL THEN
+        UPDATE Product
+        SET product_quantity = product_quantity - NEW.order_quantity
+        WHERE product_id = NEW.product_id;
+    END IF;
+END //
+DELIMITER ;
+
+-- Trigger to archive old orders before deletion
+DELIMITER //
+CREATE TRIGGER trg_archive_old_orders
+BEFORE DELETE ON `Order`
+FOR EACH ROW
+BEGIN
+    INSERT INTO OrderArchive SELECT * FROM `Order` WHERE order_id = OLD.order_id;
+END //
+DELIMITER ;

9_stored_routines_as_procedures/script.sql

@@ -1 +1,24 @@
--- Write your SQL code here
+-- Procedure to generate a monthly sales report
+DELIMITER //
+CREATE PROCEDURE GenerationOfMonthlySalesReport()
+BEGIN
+    SELECT 
+        p.product_name, 
+        SUM(o.order_quantity) AS total_sales, 
+        SUM(o.order_quantity * p.product_price) AS total_revenue
+    FROM Order o
+    JOIN Product p ON o.product_id = p.product_id
+    WHERE o.order_date BETWEEN CURDATE() - INTERVAL 1 MONTH AND CURDATE()
+    GROUP BY p.product_name;
+END //
+DELIMITER ;
+
+-- Procedure to retrieve employee performance by department
+DELIMITER //
+CREATE PROCEDURE RetrievalOfEmployeePerformance(department_id INT)
+BEGIN
+    SELECT employee_name, performance_rating
+    FROM Employee
+    WHERE department_id = department_id;
+END //
+DELIMITER ;

README.md

@@ -1,3 +1,4 @@
+[![Review Assignment Due Date](https://classroom.github.com/assets/deadline-readme-button-22041afd0340ce965d47ae6ef1cefeee28c7c493a6346c4f15d667ab976d596c.svg)](https://classroom.github.com/a/fbNyN1as)
 # BBT3104: Advanced Database Sytems Semester Project
 
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