Add t4.2 exercise.

1/GBD/assignments/t4.2-nortega.sql

@@ -0,0 +1,79 @@
+-- Nicolás A. Ortega Froysa
+-- ASIR 1
+-- GBD
+
+CREATE TABLE fabricantes(
+	codigo INT PRIMARY KEY,
+	nombre VARCHAR(100)
+);
+
+CREATE TABLE articulos(
+	codigo INT PRIMARY KEY,
+	nombre VARCHAR(100),
+	precio INT,
+	fabricante INT,
+	FOREIGN KEY (fabricante) REFERENCES fabricantes(codigo)
+);
+
+INSERT INTO fabricantes VALUES(1, 'LG');
+INSERT INTO fabricantes VALUES(2, 'SAMSUNG');
+INSERT INTO fabricantes VALUES(3, 'SIEMENS');
+INSERT INTO fabricantes VALUES(4, 'SONY');
+
+INSERT INTO articulos VALUES(1, "RADIO", 180, 1);
+INSERT INTO articulos VALUES(2, "RADIO", 100, 2);
+INSERT INTO articulos VALUES(3, "RADIO", 70, 3);
+INSERT INTO articulos VALUES(4, "RADIO", 50, 4);
+INSERT INTO articulos VALUES(5, "TELEVISION", 320, 1);
+INSERT INTO articulos VALUES(6, "TELEVISION", 850, 2);
+INSERT INTO articulos VALUES(7, "TELEVISION", 600, 3);
+INSERT INTO articulos VALUES(8, "TELEVISION", 170, 4);
+
+-- 1.1
+SELECT DISTINCT nombre FROM articulos;
+
+-- 1.2
+SELECT nombre, precio FROM articulos;
+
+-- 1.3
+SELECT nombre FROM articulos WHERE precio <= 200;
+
+-- 1.4
+SELECT * FROM articulos WHERE precio >= 60 AND precio <= 120;
+SELECT * FROM articulos WHERE precio BETWEEN 60 AND 120;
+
+-- 1.5
+SELECT nombre, precio * 166386 "Precio Pesetas" FROM articulos;
+
+-- 1.6
+SELECT AVG(precio) FROM articulos;
+
+-- 1.7
+SELECT AVG(precio) FROM articulos WHERE fabricante=2;
+
+-- 1.8
+SELECT COUNT(*) FROM articulos WHERE precio >= 180;
+
+-- 1.9
+SELECT nombre, precio FROM articulos WHERE precio >= 180 ORDER BY precio DESC, nombre ASC;
+
+-- 1.10
+SELECT * FROM articulos a JOIN fabricantes f ON a.fabricante=f.codigo;
+
+-- 1.11
+SELECT a.nombre, a.precio, f.nombre FROM articulos a JOIN fabricantes f ON a.fabricante=f.codigo;
+
+-- 1.12
+SELECT nombre, precio FROM articulos ORDER BY precio ASC LIMIT 1;
+
+-- 1.13
+INSERT INTO articulos VALUES(9, 'ALTAVOCES', 70, 2);
+
+-- 1.14
+UPDATE articulos SET nombre='IMPRESORA LASER' WHERE codigo=8;
+
+-- 1.15
+UPDATE articulos SET precio=precio*0.9;
+
+-- 1.16
+UPDATE articulos SET precio=precio-10 WHERE precio >= 120;