【優しいitパスポート】第15回：データベース：正規化で表を最適化！
Synopsis
１つの表になんでも詰め込んでしまうと、データに重複ができてしまったり、また更新し忘れが発生して矛盾が生じたりして ...
![#74 [Fun IT Passport] 1st, 2nd, and 3rd Normalization](https://i.ytimg.com/vi/jC1Ooo_Xja4/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBD_3vR6858hCSQi0fAP2vsdIypsw)
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