director normalized

Author: InMentals

videoclub.sql

@@ -44,7 +44,7 @@ create table pelicula (
 	id serial primary key,
 	titulo varchar(80) not null,
 	id_genero integer not null,
-	director varchar(80) not null,
+	id_director integer not null,
 	sinopsis text
 );
 
@@ -53,6 +53,11 @@ create table genero (
 	genero varchar(50) not null
 );
 
+create table director (
+	id serial primary key,
+	nombre varchar(80) not null
+);
+
 alter table direccion 
 add constraint direccion_socio_fk
 foreign key (num_socio)
@@ -78,6 +83,11 @@ add constraint pelicula_genero_fk
 foreign key (id_genero)
 references genero (id);
 
+alter table pelicula 
+add constraint pelicula_director_fk
+foreign key (id_director)
+references director (id);
+
 -- Inicio la inserción de datos en una tabla auxiliar:
 CREATE TABLE tmp_videoclub (
 	id_copia int4 NULL,
@@ -639,10 +649,16 @@ select distinct genero from tmp_videoclub;
 
 create unique index genero_sin_repetir on genero (lower(genero));
 
-insert into pelicula (titulo, id_genero, director, sinopsis)
-select distinct titulo, g.id, director, sinopsis
+insert into director (nombre)
+select distinct director from tmp_videoclub;
+
+create unique index director_sin_repetir on director (lower(nombre));
+
+insert into pelicula (titulo, id_genero, id_director, sinopsis)
+select distinct titulo, g.id, d.id, t.sinopsis
 from tmp_videoclub t
-inner join genero g on g.genero = t.genero;
+inner join genero g on g.genero = t.genero
+inner join director d on d.nombre = t.director;
 
 create unique index titulo_sin_repetir on pelicula (lower(titulo));
 
@@ -666,8 +682,3 @@ inner join pelicula on pelicula.id = copia.id_pelicula where no_disp.id is null
 
 
 
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