Ver originalSELECT YEAR(fecha), MONTH(fecha), fecha, SUM(ServTec) as Servicios, SUM(Productos) as Ventas, SUM(ServTec+Productos) as TotalFROM(SELECT fecha, SUM(dblCobro) as ServTec, 0 as Productos FROM TablaST GROUP BY fechaUNION ALL SELECT fecha, 0 as ServTec, SUM(dblGanancia) as Productos FROM TablaProdictos GROUP BY fecha)GROUP BY YEAR(fecha), MONTH(fecha),fecha;