10-282 dividing 5 in 3:2 ratio

SQLパズル

  Val
-----
12.59
12.99
   13
14.99
   15
15.01

To do dividing 5 in 3:2 ratio.
that is lower 3 goes to the lower boundary and then upper 2 goes to the upper boundary.

出力結果
  Val  newVal
-----  ------
12.59      10
12.99      10
   13      15
14.99      15
   15      15
15.01      15

こちらを参考にさせていただきました(英語)

SQL

select Val,trunc((Val+2)/5)*5 as newVal
  from (select 12.59 as Val from dual union
        select 12.99        from dual union
        select 13           from dual union
        select 14.99        from dual union
        select 15           from dual union
        select 15.01        from dual);

解説

dividing 5 in 3:2 ratio
と呼ばれるそうです。

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