diff --git a/ERD.jpg b/ERD.jpg
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diff --git a/create.sql b/create.sql
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+CREATE DATABASE IF NOT EXISTS lab_my_sql;
+
+USE lab_my_sql;
+
+DROP TABLE IF EXISTS cars;
+
+CREATE TABLE cars (id INT AUTO_INCREMENT PRIMARY KEY,
+			id_vin INT,
+			manufacturer VARCHAR(30),
+            model VARCHAR(30),
+            year INT,
+            color VARCHAR(30),
+            price FLOAT);
+            
+DROP TABLE IF EXISTS customers;
+
+CREATE TABLE customers (id INT AUTO_INCREMENT PRIMARY KEY,
+			id_cust INT,
+			name VARCHAR(50),
+            phone INT,
+            email VARCHAR(50),
+            address VARCHAR(50),
+            city VARCHAR(50),
+            state_province VARCHAR(50),
+            country VARCHAR(50),
+            zip_postal_code INT);
+
+DROP TABLE IF EXISTS sales_persons;
+
+CREATE TABLE sales_persons (id INT AUTO_INCREMENT PRIMARY KEY,
+			id_staff INT,
+			name_staff VARCHAR(30),
+            store VARCHAR(30));
+            
+DROP TABLE IF EXISTS invoices;            
+
+CREATE TABLE invoices (id INT AUTO_INCREMENT PRIMARY KEY,
+			inv_nr INT UNIQUE,
+			date DATE,
+            customer_id INT,
+            car_id INT,
+            sales_id INT,
+            FOREIGN KEY (customer_id) REFERENCES customers(id),
+            FOREIGN KEY (car_id) REFERENCES cars(id),
+            FOREIGN KEY (sales_id) REFERENCES sales_persons(id));
+
+SELECT * FROM lab_my_sql.cars
+
+USE lab_my_sql;
+SHOW TABLES;
+DESCRIBE sales_persons;
+
+
diff --git a/my_sql_ERD.mwb b/my_sql_ERD.mwb
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diff --git a/seeding.sql b/seeding.sql
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+USE lab_my_sql;
+
+ALTER TABLE cars MODIFY COLUMN id_vin VARCHAR(30);
+
+INSERT INTO cars (id_vin, manufacturer, model, year, color, price)
+VALUES 	('3K096I98581DHSNUP', 'Volkswagen', 'Tiguan', 2019, 'Blue', 18000),
+		('ZM8G7BEUQZ97IH46V', 'Peugeot', 'Rifter', 2019, 'Red', 15000),
+		('RKXVNNIHLVVZOUB4M', 'Ford', 'Fusion', 2018, 'White', 14400),
+		('HKNDGS7CU31E9Z7JW', 'Toyota', 'RAV4', 2018, 'Silver', 21000),
+		('DAM41UDN3CHU2WVF6', 'Volvo',	'V60', 2019, 'Gray', 25000),
+		('DAM41UDN3CHU2WVF7', 'Volvo', 'V60 Cross Country', 2019, 'Gray', 26500);
+
+
+
+
+SET SQL_SAFE_UPDATES = 0;
+
+
+ALTER TABLE customers MODIFY COLUMN phone VARCHAR(30);        
+
+INSERT INTO customers (id_cust, name, phone, email, address, city, state_province, country, zip_postal_code)
+VALUES 	(10001, 'Pablo Picasso', '+34 636 17 63 82', ' ', 'Paseo de la Chopera, 14', 'Madrid', 'Madrid', 'Spain', 28045),
+		(20001, 'Abraham Lincoln', '+1 305 907 7086', ' ', '120 SW 8th St', 'Miami', 'Florida', 'United States', 33130),
+		(30001, 'Napoléon Bonaparte', '+33 1 79 75 40 00', ' ','40 Rue du Colisée', 'Paris', 'Île-de-France', 'France', 75008);
+        
+UPDATE customers SET email = ' ';
+
+INSERT INTO sales_persons (id_staff, name_staff, store)
+VALUES 	(201, 'Petey Cruiser', 'Madrid'),
+		(202, 'Anna Sthesia', 'Barcelona'),
+        (203, 'Paul Molive',	'Berlin'),
+        (204, 'Gail Forcewind', 'Paris'),
+        (205, 'Paige Turner', 'Mimia'),
+        (206, 'Bob Frapples', 'Mexico City'),
+        (207, 'Walter Melon', 'Amsterdam'),
+        (208, 'Shonda Leer', 'São Paulo');
+
+
+SELECT*
+FROM customers;
+
+ALTER TABLE invoices DROP FOREIGN KEY invoices_ibfk_1;
+
+ALTER TABLE customers
+ADD UNIQUE INDEX unique_id_cust (id_cust);
+
+ALTER TABLE invoices
+ADD CONSTRAINT invoices_ibfk_1 FOREIGN KEY (customer_id) REFERENCES customers(id_cust);
+
+SELECT * FROM sales_persons;
+
+ALTER TABLE sales_persons
+ADD UNIQUE INDEX unique_id_staff (id_staff);
+
+ALTER TABLE invoices DROP FOREIGN KEY invoices_ibfk_3;
+ALTER TABLE invoices
+ADD CONSTRAINT invoices_ibfk_3 FOREIGN KEY (sales_id) REFERENCES sales_persons(id_staff);
+
+INSERT INTO invoices (inv_nr, date, customer_id, car_id, sales_id)
+VALUES 	(852399038, '2018-08-22', 10001, 13, 203),
+		(731166526, '2018-12-31', 20001, 16, 205),
+        (271135104, '2019-01-22', 30001, 17, 207);
+
+SELECT * FROM customers;
\ No newline at end of file
diff --git a/update.sql b/update.sql
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+++ b/update.sql
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+USE lab_my_sql;
+
+SELECT * FROM customers;
+
+UPDATE lab_my_sql.customers
+SET email = 'ppicasso@gmail.com'
+WHERE id = 104;
+
+UPDATE lab_my_sql.customers
+SET email = 'lincoln@us.gov'
+WHERE id = 105;
+
+UPDATE lab_my_sql.customers
+SET email = 'hello@napoleon.me'
+WHERE id = 106;