Ver originalSELECT ..... FROM.... WHERE ID_CATEGORIA = 1 <----Padre Nivel 1 OR ID_CATEGORIA IN (SELECT id FROM categorias WHERE ID_Padre=1) <---Hijas Nivel 2 OR ID_CATEGORIA IN (SELECT id FROM categorias WHERE id_Padre IN (SELECT id FROM categorias WHERE ID_Padre=1)) <---Nietas Nivel 3 OR ID_CATEGORIA IN (SELECT id FROM categorias WHERE id_Padre IN (SELECT id FROM categorias WHERE id_Padre IN (SELECT id FROM categorias WHERE ID_Padre=1))) <---Biznietas Nivel 4 (Max)