ÔÓÍÊÖÈß ÂÎ ÔÐÀÇÅ SELECT ÑÎ ÑÏÅÖÈÔÈÊÀÖÈÅÉ DISTINCT

Âûäàòü îáùåå êîëè÷åñòâî ïîñòàâùèêîâ, ïîñòàâëÿþùèõ â íàñòîÿùåå âðåìÿ äåòàëè:

SELECT                COUNT (DISTINCT               ÍÎÌÅЗÏÎÑÒÀÂÙÈÊÀ)

 FROM                   SP;

Ðåçóëüòàò:

4

Ñîäåðæàíèå ðàçäåëà

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