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"Group by" v predelah odnoi funkcii
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#18+
kak sdelat funkciyu, kotoraya vozvraschaet danjie as "multi column" grouped by nekotoromu usloviyu. U menya poluchilos tolko kaskadirovaniem vizova dvuh funkciy. Est' nekotoroe ogranichenie : kagdaya ROW formiruetsa s ispolzovaniem vneshney biblioteki (samopisnaya) funkciyami tipa: select iif_is(condition,expr_if_true,expr_if_false) as .... from ... estestvenno po kagdoi stroke - sledovatelno, group by konstrukciya ne primenima :( ... |
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| 27.01.2004, 12:32 |
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"Group by" v predelah odnoi funkcii
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#18+
Ну да. Неприменима. GROUP BY <col>[,<col>], где <col> реальное (!) поле. А в чем вопрос ? ... |
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| 27.01.2004, 12:47 |
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