2.2 Abfragen mit verknüpften Tabellen

SQL-Abfragen auf Gateway-Daten in Access.

SELECT * FROM Customers
WHERE Country = 'Germany'
ORDER BY Name;

SELECT c.Name, o.OrderDate, o.Total
FROM Customers AS c
INNER JOIN Orders AS o ON c.Id = o.CustomerId
WHERE o.OrderDate > #2024-01-01#;

Filter werden an den Server weitergeleitet - große Datenmengen werden nicht lokal geladen.

SELECT Country, COUNT(*) AS Anzahl
FROM Customers
GROUP BY Country;