【優しいitパスポート】第16回：データベース：関係演算！選択・射影・結合！
Synopsis
今回は表から特定の行や列、また表を結合する演算、関係演算を勉強しましょう！ ・特定の条件の行だけを取り出す「選択」 ...
![#71 [Fun IT Passport] Relational database](https://i.ytimg.com/vi/gtVZ2gtIhAM/hq720.jpg?sqp=-oaymwEcCNAFEJQDSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLBAELjeUZ_kL-kf6DxSkv6HTR9CGA)
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