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SQL Acostaselect materia, count(*)/(select count(*) from financiera) as probabilidad from financiera where materia in(select distinct materia from financiera) group by materia; select materia, industria, count(*)/(select count(*) from financiera) as Probabilidad from financiera where materia in(select distinct materia from financiera) and industria in(select distinct industria from financiera) group by industria, materia order by materia, industria; true. |