Ýëåìåíòû ìàññèâà ìîãóò èäåíòèôèöèðîâàòüñÿ êëþ÷îì

Ïîñëóæíîé ñïèñîê

            Àíêåòà

                                          Çàðïëàòà

                                                                      Äàòà                                        Ðàáîòà

Òàá.íîìåð                        Äîëæíîñòü

 ÔÈΠ                                   Ïîë                                         Äîëæíîñòü     Îðãàíèçàöèÿ

            Ãîä ðîæäåíèÿ

                                                                                              Ìàññèâ

    Ñòðóêòóðà      

                                                                                  Ñîòðóäíèêè

                                                                                 

                                                                     Àíêåòà                        

                                                                                                          Çàðïëàòà

 Òàá. íîìåð

                                                                                                          Ïîñëóæíîé ñïèñîê

                      ÔÈÎ

                                                                      Äàòà

 

                                  Äàòà                                                                       Ðàáîòà

ðîæäåíèÿ

          ×èñëî                                                    

                                                                          Äîëæíîñòü             Îðãàíèçàöèÿ 

                          Ìåñÿö                     Ãîä     

                   Ìíîãîóðîâíåâîå    äàííîå                                                           

Ðèñ.1

Ýëåìåíòû ìàññèâà ìîãóò èäåíòèôèöèðîâàòüñÿ êëþ÷îì - äàííûì, çíà÷åíèÿ êîòîðîãî âçàèìíî îäíîçíà÷íî îïðåäåëÿþò ýêçåìïëÿðû ýëåìåíòîâ.

Ñîñòàâíûå òèïû äàííûõ ïðåäñòàâëÿþò  èåðàðõè÷åñêèå ñâÿçè çíà÷åíèé äàííûõ â ÁÄ.

Ñîäåðæàíèå  Íàçàä  Âïåðåä

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Forekc.ru
Ðåôåðàòû, äèïëîìû, êóðñîâûå, âûïóñêíûå è êâàëèôèêàöèîííûå ðàáîòû, äèññåðòàöèè, ó÷åáíèêè, ó÷åáíûå ïîñîáèÿ, ëåêöèè, ìåòîäè÷åñêèå ïîñîáèÿ è ðåêîìåíäàöèè, ïðîãðàììû è êóðñû îáó÷åíèÿ, ïóáëèêàöèè èç ïðîôèëüíûõ èçäàíèé

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