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
一些SQL題目
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
一些SQL題目