Super Querys Alcántara Noriega Marco Antonio

select tabla, count(*)/(select count(*) from financieras) as probabilidad from financieras where tabla in(select distinct tabla from financieras) group by tabla;
select tabla, count(*)/(select count(*) from financieras) as probabilidad from financieras where tabla in(select distinct tabla from financieras) and materia in(select distinct materia from arbol) group by materia, tabla order by tabla, materia;