bcnf

基本解釋

Finally, we presented Boyce-Codd normal form (BCNF) and discussed how it is a stronger form of 3NF.
最后，我們提出了博伊斯- 科德范式（BCNF），并討論如何，它是一個(gè)更強(qiáng)的3NF形式。
08translation.cn
The article discussed the applications of the closure algorithm to solve the problem of the functional dependency projection, and the relation decomposition based on BCNF.
文中討論了閉包算法在函數(shù)依賴投影求解以及基于BCNF的關(guān)系分解中的應(yīng)用。
Digraph will be constructed by using the dependence of the left of subset's FD. Some nodes will help to decompose a subschema of BCNF. The key of the subschema is the left or left's equivalence.
FD集中根據(jù)左部等價(jià)形成劃分，劃分的各子集根據(jù)左部的依賴關(guān)系形成一個(gè)有向圖，有向圖中每一個(gè)節(jié)點(diǎn)的FD可能是一個(gè)符合BCNF的子模式的FD，其關(guān)鍵字就是各子集的等價(jià)左部。