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SQLで列から偶数、奇数を出す方法

Last updated at Posted at 2019-11-22

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問題文の要点は2つ:
1、「ID」の列で偶数("even number")の要素を出します。
2、同じ(duplicates)要素を排除(exclude)します。

対策:
1、MODを使います。
2、DISTINCTを使います。

解決コード:
Select distinct city from station where mod(ID,2)=0;
奇数の場合:
Select distinct city from station where mod(ID,2)=1;

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