SELECT DESCRIPCION,
(SELECT SUM(DIAS_PROYECTADOS) FROM D_PRES_DIAS_ENTREGA WHERE COD_PRESU = T1.COD_PRESU) AS PROYECTADO,
(SELECT SUM(DIAS_REALES) FROM D_PRES_DIAS_ENTREGA WHERE COD_PRESU = T1.COD_PRESU) AS "REAL",
(SELECT SUM(TOTAL) FROM D_PRES_MAQUI WHERE COD_PRESU = T1.COD_PRESU) AS "TOTAL S/."
FROM PRESUPUESTO T1