Código SQL [-] select sum(horas_empleado) as suma_horas from tabla group by empleado
select sum(horas_empleado) as suma_horas from tabla group by empleado
Código SQL [-] select sum(horas_empleado) as suma_horas from tabla where empleado = 'determinado_empleado'
select sum(horas_empleado) as suma_horas from tabla where empleado = 'determinado_empleado'