I can´t use alias in sql delete

Question

I tried execute this sql sentence

delete 
        from reclamo r
        where exists ( select 1 from reclamo r
                        join cliente c on r.c         


        

Answer 1

Don't use an alias. This is equivalent logic and will work fine.

delete from reclamo
where cod_cliente in 
(select cod_cliente
from cliente c join localidad l on c.cod_localidad = l.cod_localidad
where l.descripcion = 'San Justo');