SQLNotebook 一些SQL題目 正規化TABLE中取非主鍵彙總 題目:https://nalocal.github.io/SQLNotebook/20200312/index.html 練習環境:http://sqlfiddle.com/#!9/dcac85/6/0 環境建置SQL:https://github.com/NALocal/SQLNotebook/blob/master/20200312/SQL.txt 答案:http://sqlfiddle.com/#!9/dcac85/9