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個人經驗來說,正規化還是要做,但不要走火入魔。 一般來說做到 3NF 就很夠了,而且不要做過頭。 做過頭的意思就是,把你的系統中不需要考慮的變化也做了正規化。
舉例來說,以下兩個 ERD 可以達成的功能是很接近的,有沒有必要做到第二個 ERD 那樣呢? 這就要看你做的是符合專案需求的系統,還是要提供一個更彈性的平台、產品型的系統了。
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