I have this SQL query, and i've tried to many ways to group by, but it doesn't work for me, i want to group by **noExp**

```
select Alumnos.nombreComp as Nombre, 
       Carreras.nombre as Carrera, 
       Alumnos.noExp as Expediente, 
       Historial.fecha as Fecha, 
       Historial.equipo as Equipo 
from Alumnos, Historial, Carreras 
where YEAR(fecha)= @año 
  and MONTH (fecha)=@Mes 
  and Historial.noExp = Alumnos.noExp 
  and Alumnos.carrera = Carreras.id_carrera 
  and Alumnos.activo = 1

```

help!