(3) 請說明何謂關聯式資料庫的第二正規化(2NF)，下面的資料表是 2NF 嗎？如果不是請對該資料表進行第二正規化。

二、The following graph represents the communication channels and their respective time delays (in minutes) between eight communication centers. The centers are depicted as vertices, the channels as edges, and the communication time delay for each channel is indicated by the weight of the edge. Suppose communication center a broadcasts news through all its channels at 8:00 a.m. Other centers will rebroadcast the news through their channels immediately upon receiving it. For communication centers b, c, d, e, f, g, and h, determine the earliest time each receives the news. (20%)

題組內容

(3) 請說明何謂關聯式資料庫的第二正規化(2NF)，下面的資料表是 2NF 嗎？如果不是請對該資料表進行第二正規化。

相關申論題

相關試卷

題組內容

(3) 請說明何謂關聯式資料庫的第二正規化(2NF)，下面的資料表是 2NF 嗎？如果不是請對 該資料表進行第二正規化。

相關申論題

相關試卷

(3) 請說明何謂關聯式資料庫的第二正規化(2NF)，下面的資料表是 2NF 嗎？如果不是請對該資料表進行第二正規化。