Íàñòðàèâàåìàÿ ñîðòèðîâêà ïîëåé èç ðàçíûõ òàáëèö
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Ïÿòíèöà, 19 Ñåíòÿáðÿ 2014 ã. 18:03
+ â öèòàòíèê
Äîáðûé äåíü, óâàæàåìûå ôîðóì÷àíå!
ß íîâè÷îê, êàê çäåñü, òàê è â ìèðå SQL, à óæå ñòîëêíóëñÿ ñ ïåðâîé ïðîáëåìîé, êîòîðóþ ìíå íèêàê íå óäàåòñÿ ðåøèòü ñ ïîìîùüþ ãóãëà!
Èòàê
Äàíî: Áàçà äàííûõ MS Access; 2 òàáëèöû, ñâÿçàííûå îäíîèìåííûìè êëþ÷àìè firm_id:
1)Firm-firm_id
-firm_name
(íàçâàíèå ôèðìû)2)Contracts-firm_id
-contract_punkt
(ïîðÿäêîâûé íîìåð äîãîâîðà)Íàéòè:âûáîðêó èç äâóõ òàáëèö, îòñîðòèðîâàííóþ ïî äâóì ïîëÿì:
-firm_name
-contract_punkt
Ðåøåíèå:Âîò, êàêîé êîä ïèñàë ÿ.
SELECT Firm.firm_name, Contracts.contract_punkt, ...äðóãèå ñòîëáöû òàáëèöû Contracts...
FROM Firm
INNER JOIN Contracts ON Firm.firm_id = Contracts.firm_id
ORDER BY Firm.firm_name, Contracts.contract_punkt;
Çàòåì êîíñòðóêòîð çàïðîñîâ (ñì.Ðèñóíîê) ñãåíåðèðîâàë àíàëîãè÷íûé êîä).
Îäíàêî ñîðòèðîâêà ïî firm_name íå îñóùåñòâëÿåòñÿ â íåçàâèñèìîñòè îò åå ïîëîæåíèÿ ïîñëå êîìàíäû ORDER BY.

Îáùàëñÿ ñ äðóçüÿìè, ðàáîòàþùèìè ñ äðóãèìè ÑÓÁÄ (ê ïðèìåðó, Teradata). Ó íèõ àíàëîãè÷íûé çàïðîñ ñðàáàòûâàë áåç êîñÿêîâ.
Ïîäñêàæèòå, ïîæàëóéñòà, â ÷åì ìîæåò áûòü ïðîáëåìà? ×òî ÿ íå òàê äåëàþ â ýòîé æèçíè? :-)
Áîëüøîå ñïàñèáî!
http://www.sql.ru/forum/1116620/nastraivaemaya-sortirovka-poley-iz-raznyh-tablic
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