vault backup: 2024-02-09 10:58:22

Semester 2/Database Systems/Week 4/Week 4 Database Systems.md

@@ -64,3 +64,68 @@ T1 and T2 conflict as T1's write for X is overwritten by T2's write for X before
 ( 2 conflicts )
 T1 and T2 conflict as T1's write operation is overwritten by T2's write operation before either transaction is complete.
 ( 3 conflicts )
+
+# Workshop
+
+```sql
+create table chap27.car(
+	carId INT,
+	carMake VARCHAR(8),
+	carModel VARCHAR(12),
+	carPrice INT,
+	primary key( carId )
+);
+
+create table chap27.part(
+	partId INT,
+	partName VARCHAR(6),
+	partPrice INT,
+	primary key( partId )
+);
+
+create table chap27.carPart(
+	carId INT,
+	partId INT,
+	foreign key (carId) references car(carId),
+	foreign key (partId) references part(partId)
+);
+
+insert into car values
+	(1, 'Ford', 'Focus', 18000),
+	(2, 'Toyota', 'Avensis', 20000),
+	(3, 'BMW', '640d', 60000),
+	(4, 'Porsche', 'Boxter 718', 42000);
+	
+insert into part values
+	(1, 'part1', 54),
+	(2, 'part2', 664),
+	(3, 'part3', 224),
+	(4, 'part4', 11),
+	(5, 'part5', 187),
+	(6, 'part6', 22),
+	(7, 'part7', 998),
+	(8, 'part8', 115),
+	(9, 'part9', 23),
+	(10, 'part10', 55);
+
+insert into carpart values
+	(1, 3),
+	(1, 8),
+	(1, 5),
+	(1, 1),
+	(1, 7),
+	(2, 3),
+	(2, 4),
+	(2, 2),
+	(2, 8),
+	(3, 9),
+	(3, 5),
+	(3, 3),
+	(3, 1),
+	(4, 7),
+	(4, 9),
+	(4, 5),
+	(4, 6),
+	(4, 4),
+	(4, 2);
+```