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GID Projects 2020-08-08 20:00:35 -04:00
parent 2d6304f4ac
commit 4ea3c5b68e
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optimizacion.sql
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SELECT P.ID_PAIS, P.NOMBRE, COUNT(1) AS CANTIDAD_ATLETA SELECT P.ID_PAIS, P.NOMBRE, COUNT(A.ID_ATLETA) AS CANTIDAD_ATLETA
FROM COMPETENCIA C FROM COMPETENCIA C
LEFT JOIN PARTICIPAR_COMPETENCIA PC ON (C.ID_COMPETENCIA = PC.ID_COMPETENCIA) LEFT JOIN PARTICIPAR_COMPETENCIA PC ON (C.ID_COMPETENCIA = PC.ID_COMPETENCIA)
LEFT JOIN ATLETA A ON A.ID_ATLETA = PC.ID_ATLETA LEFT JOIN ATLETA A ON A.ID_ATLETA = PC.ID_ATLETA