Ver originalSELECT * FROM horarios WHERE id_profeIN (SELECT id_profe FROM horariosWHEREinicio <= '$lun1'AND fin >= '$lun2'AND dia = 'Lunes'UNIONSELECT id_profe FROM horariosWHEREinicio <= '$mar1'AND fin >= '$mar2'AND dia = 'Martes') GROUP BY id_profe