group: ventas_teoria



clientes = {
	dni:number, nom:string
	10, jose
	20, ana
	30, luis
}

proveedores = {
	dni:number, nom:string
	100, maria
	20, ana
	15, pedro
	30, jorge
	}

	productos = {
	cod:string, nomp:string,  dni:number, precio:number
	p1, leche, 100, 17
	p2, yogur, 100,23
	p3, pan, 15, 10
	p4, detergente, 20, 40
	}

	ventas = {
	dni:number, cod:string, cant:number, preciovta:number
	10, p4, 1, 12
	10, p2, 3, 20
	20, p2, 10, 20
	10, p3, 2, 15
	10, p1, 2, 17
	}