Ðàçðàáîòêà áàç äàííûõ â Delphi. 11 Óðîêîâ
Âíåøíèå ñîåäèíåíèÿ - ÷àñòü 2
Phil Forest Quality Assurance
...
 äàííîì çàïðîñå âñå ñîòðóäíèêè îêàçàëèñü ðàñïðåäåëåíû ïî îòäåëàì, èíà÷å íàçâàíèÿ îòäåëîâ çàìåñòèëèñü áû çíà÷åíèåì null.
À âîò ïðèìåð ïðàâîãî ñîåäèíåíèÿ:
SELECT first_name, last_name, department
FROM employee e RIGHT JOIN department d
ON e.dept_no = d.dept_no
ïîëó÷èòü ñïèñîê ñîòðóäíèêîâ
è íàçâàíèå èõ îòäåëîâ,
âêëþ÷àÿ îòäåëû, â êîòîðûå åùå
íå íàçíà÷åíû ñîòðóäíèêè
FIRST_NAME LAST_NAME DEPARTMENT
=============== ============= =========================
Terri Lee Corporate Headquarters
Oliver H. Bender Corporate Headquarters
Mary S. MacDonald Sales and Marketing
Michael Yanowski Sales and Marketing
Robert Nelson Engineering
Kelly Brown Engineering
Stewart Hall Finance
Walter Steadman Finance
Leslie Johnson Marketing
Carol Nordstrom Marketing
<null> <null> Software Products Div.
Bruce Young Software Development
...
 ðåçóëüòèðóþùèé íàáîð âõîäèò è îòäåë “Software Products Div.” (à òàêæå îòäåë “Field Office: Singapore”, íå ïðåäñòàâëåííûé çäåñü), â êîòîðîì åùå íåò íè îäíîãî ñîòðóäíèêà.
