Êý¾Ý¿â°üº¬µÄÈý¼¶Ä£Ê½·Ö±ðÊÇʲô
Êý¾Ý¿âϵͳͨ³£²ÉÓÃʲô¼¶Ä£Ê½½á¹¹
Êý¾Ý¿âϵͳͨ³£²ÉÓÃÈý¼¶Ä£Ê½½á¹¹£¬·Ö±ðÊÇÍâģʽ£¨Íⲿģʽ/ÊÓͼ£©¡¢¸ÅÄîģʽ£¨Â߼ģʽ£©ºÍÄÚģʽ£¨ÎïÀí...
...ÕâÈý¼¶Ä£Ê½·Ö±ð¶ÔÓ¦µÄÊý¾Ý¿âµÄ()¡£
¡¾´ð°¸¡¿£ºB Íâģʽ£ºÒ²³ÆÓû§Ä£Ê½£¬ËüÊÇÊý¾Ý¿âÓû§Äܹ»¿´¼ûºÍʹÓõľֲ¿Êý¾ÝµÄÂß¼½á¹¹ºÍÌØÕ÷µÄÃèÊö£¬ÊÇÊý¾Ý¿âÓû§µÄÊý¾ÝÊÓͼ£¬ÊÇ...
Êý¾Ý¿âϵͳµÄÈý¼¶Ä£Ê½½á¹¹ÊÇʲô?
Êý¾Ý¿â¹ÜÀíϵͳµÄÈý¼¶Ä£Ê½½á¹¹ÓÉÍâģʽ¡¢Ä£Ê½ºÍÄÚģʽ×é³É¡£Íâģʽ(external schema)£¬»ò×Óģʽ(subschema...
Êý¾Ý¿âϵͳµÄÈý¼¶Ä£Ê½½á¹¹ÊÇÖ¸( )¡£
¡¾´ð°¸¡¿£ºC Êý¾Ý¿âϵͳµÄÈý¼¶Ä£Ê½½á¹¹ÊÇÖ¸Êý¾Ý¿âϵͳÓÉÍâģʽ¡¢Ä£Ê½ºÍÄÚģʽÈý¼¶³éÏóģʽ¹¹³É¡£Èý¼¶³éÏóģʽÔÚÊý¾Ý¿âϵͳÖж¼´æ´¢...
Êý¾Ý¿âÈý¼¶Ä£Ê½µ½µ×ÊÇʲôÒâ˼
Èý¼¶Ä£Ê½½á¹¹£ºÍâģʽ¡¢Ä£Ê½ºÍÄÚģʽһ¡¢Ä£Ê½£¨Schema£©¶¨Ò壺Ҳ³ÆÂ߼ģʽ£¬ÊÇÊý¾Ý¿âÖÐÈ«ÌåÊý¾ÝµÄÂß¼½á...
Êý¾Ý¿âϵͳµÄÈý¼¶Ä£Ê½°üÀ¨?
Êý¾Ý¿âÁìÓò¹«Èϵıê×¼½á¹¹ÊÇÈý¼¶Ä£Ê½½á¹¹£¬Ëü°üÀ¨Íâģʽ¡¢¸ÅÄîģʽ¡¢ÄÚģʽ£¬ÓÐЧµØ×éÖ¯¡¢¹ÜÀíÊý¾Ý£¬
Êý¾Ý¿âϵͳµÄ¡°Èý¼¶Ä£Ê½½á¹¹¡±Ö¸Ê²Ã´?
Èý¼¶Ä£Ê½½á¹¹£ºÍâģʽ¡¢Ä£Ê½ºÍÄÚģʽ Ò»¡¢Ä£Ê½£¨Schema£©¶¨Ò壺Ҳ³ÆÂ߼ģʽ£¬ÊÇÊý¾Ý¿âÖÐÈ«ÌåÊý¾ÝµÄÂß¼½á¹¹ºÍÌØÕ÷µÄÃèÊö£¬ÊÇËùÓÐ...
Êý¾Ý¿âϵͳ¶¼ÓÐÄÄÈý¼¶Ä£Ê½½á¹¹ÆäÓŵãÊÇʲô
ÈËÃÇΪÊý¾Ý¿âÉè¼ÆÁËÒ»¸öÑϽ÷µÄÌåϵ½á¹¹£¬Êý¾Ý¿âÁìÓò¹«Èϵıê×¼½á¹¹ÊÇÈý¼¶Ä£Ê½½á¹¹£¬Ëü°üÀ¨Íâģʽ¡¢¸ÅÄîģʽ¡¢ÄÚģʽ¡£ÓÐЧµØ×éÖ¯¡¢...
ÂÛÊöÊý¾Ý¿âϵͳµÄÈý¼¶Ä£Ê½½á¹¹,²¢ËµÃ÷ÕâÖֽṹµÄÓŵã - °Ù ...
Êý¾Ý¿âÈý¼¶Ä£Ê½½á¹¹£º1. ģʽ£ºÒ²³ÆÂ߼ģʽ£¬ÊÇÊý¾Ý¿âÖÐÈ«ÌåÊý¾ÝµÄÂß¼½á¹¹ºÍÌØÕ÷µÄÃèÊö£¬ÊÇËùÓÐÓû§µÄ¹«¹²Êý¾ÝÊÓͼ¡£Ò»¸öÊý¾Ý¿â...
Êý¾Ý¿âÁìÓò¹«Èϵıê×¼½á¹¹ÊÇÈý¼¶Ä£Ê½½á¹¹,Ëü°üÀ¨...
Êý¾Ý¿âÁìÓò¹«Èϵıê×¼½á¹¹ÊÇÈý¼¶Ä£Ê½½á¹¹£¬Ëü°üÀ¨£ºÍâģʽ£¨External Schema£©¡¢¸ÅÄîģʽ£¨Conceptual Schema...