SQL LAST() Function

LAST() Funkcja

LAST() zwraca ostatnią wartość wybranej kolumny.

SELECT LAST(column_name) FROM table_name;

Note: LAST() funkcja jest obsługiwana tylko w MS Access.

SELECT TOP 1 column_name FROM table_name
ORDER BY column_name DESC;

SELECT TOP 1 CustomerName FROM Customers
ORDER BY CustomerID DESC;

SELECT column_name FROM table_name
ORDER BY column_name DESC
LIMIT 1;

SELECT CustomerName FROM Customers
ORDER BY CustomerID DESC
LIMIT 1;

SELECT column_name FROM table_name
ORDER BY column_name DESC
WHERE ROWNUM <=1;

SELECT CustomerName FROM Customers
ORDER BY CustomerID DESC
WHERE ROWNUM <=1;

W tym tutorialu użyjemy znaną bazę danych Northwind.

Poniżej znajduje się wybór z "Customers" tabeli:

CustomerID	CustomerName	ContactName	Address	City	PostalCode	Country
1	Alfreds Futterkiste	Maria Anders	Obere Str. 57	Berlin	12209	Germany
2	Ana Trujillo Emparedados y helados	Ana Trujillo	Avda. de la Constitucion 2222	Mexico D.F.	05021	Mexico
3	Antonio Moreno Taqueria	Antonio Moreno	Mataderos 2312	Mexico D.F.	05023	Mexico
4	Around the Horn	Thomas Hardy	120 Hanover Sq.	London	WA1 1DP	UK
5	Berglunds snabbkop	Christina Berglund	Berguvsvagen 8	Lulea	S-958 22	Sweden

Poniższa instrukcja SQL wybiera ostatnią wartość "CustomerName" kolumny z "Customers" tabeli:

SELECT LAST(CustomerName) AS LastCustomer FROM Customers;