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<em>\u8ba2\u5355<\/em>\u548c<em>\u4ea7\u54c1<\/em>.<\/li>\n<li><strong>\u5c5e\u6027\uff1a<\/strong>\u8fd9\u4e9b\u662f\u63cf\u8ff0\u5b9e\u4f53\u7684\u5177\u4f53\u7ec6\u8282\u3002\u5bf9\u4e8e<em>\u7528\u6237<\/em>\u5b9e\u4f53\uff0c\u5c5e\u6027\u53ef\u80fd\u5305\u62ec<em>\u7528\u6237\u540d<\/em>, 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A \u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u4e0e\u8868 B \u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u7cbe\u786e\u5bf9\u5e94\u3002<\/td>\n<td>\u5728\u4efb\u4e00\u8868\u4e2d\u653e\u7f6e\u5916\u952e\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u5bf9\u591a\uff081:N\uff09<\/td>\n<td>\u8868 A \u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u4e0e\u8868 B \u4e2d\u7684\u591a\u6761\u8bb0\u5f55\u76f8\u5173\u8054\u3002<\/td>\n<td>\u5728\u8868 B \u4e2d\u653e\u7f6e\u6307\u5411\u8868 A \u7684\u5916\u952e\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u591a\u5bf9\u591a\uff08N:M\uff09<\/td>\n<td>\u8868 A \u4e2d\u7684\u591a\u6761\u8bb0\u5f55\u4e0e\u8868 B \u4e2d\u7684\u591a\u6761\u8bb0\u5f55\u76f8\u5173\u8054\u3002<\/td>\n<td>\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u6765\u81ea\u4e24\u4e2a\u8868\u7684\u5916\u952e\u7684\u8fde\u63a5\u8868\uff08\u6865\u63a5\u8868\uff09\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\ud83d\ude80 \u5229\u7528 ERD 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