ADD CONSTRAINT `Competition_ibfk_1` FOREIGN KEY (`Champ_ID`) REFERENCES `Championship` (`Champ_ID`), ADD CONSTRAINT `Competition_ibfk_2` FOREIGN KEY (`Round_ID`) REFERENCES `Round_Definition` ...

created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(), updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW() -- Índices para mejorar rendimiento CREATE INDEX IF NOT EXISTS idx_grades_year ON public.grades(year); ...

The DICTIONARY tables component is specified in the FROM clause of a SELECT statement. DICTIONARY is a reserved libref for use only in PROC SQL. Data from DICTIONARY tables are generated at run time.