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Hallo Robert,

vielen Dank für Deine Bemühungen.

ich werde Dir mal meine Tabellen übermitteln, damit Du siehst wie das zu verstehen ist.

Robert Großkopf schrieb:
 Das kann
natürlich auch durch Eingaben in ein Formular erfolgen:

SELECT DISTINCT "Tabelle"."SeeID",
"Untergrenze"."Tiefe_Untergrenze",
"Untergrenze"."Volumen_Untergrenze",
"Obergrenze"."Tiefe_Obergrenze",
"Obergrenze"."Volumen_Obergrenze"
FROM
"Tabelle",
(SELECT "SeeID", MAX( "Tiefe" ) AS "Tiefe_Untergrenze", MAX( "Volumen" )
AS "Volumen_Untergrenze" FROM "Tabelle" WHERE "Tiefe" <= :Tiefe GROUP BY
"SeeID") AS "Untergrenze",
(SELECT "SeeID", MIN( "Tiefe" ) AS "Tiefe_Obergrenze", MIN( "Volumen" )
AS "Volumen_Obergrenze" FROM "Tabelle" WHERE "Tiefe" >= :Tiefe GROUP BY
"SeeID") AS "Obergrenze"
WHERE "Tabelle"."SeeID" = "Untergrenze"."SeeID" AND "Tabelle"."SeeID" =
"Obergrenze"."SeeID"

Das Beispiel liegt hier:
http://robert.familiegrosskopf.de/lo_hb/Min_Max.odb

Gruß

Robert


Gruss Marino


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