Código SQL [-] SELECT FIRST 1 T1.ID_TABLA, T1.VALIDODESDE, T1.ACTIVO, FROM TABLA T1 WHERE T1.VALIDODESDE = (SELECT MIN(T2.VALIDODESDE) FROM TABLA T2) GROUP BY T1.ID_TABLA, T1.VALIDODESDE, T1.ACTIVO
SELECT FIRST 1 T1.ID_TABLA, T1.VALIDODESDE, T1.ACTIVO, FROM TABLA T1 WHERE T1.VALIDODESDE = (SELECT MIN(T2.VALIDODESDE) FROM TABLA T2) GROUP BY T1.ID_TABLA, T1.VALIDODESDE, T1.ACTIVO