回答編集履歴
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追記
answer
CHANGED
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@@ -24,4 +24,14 @@
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and t1.ID=t2.ID
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)
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group by ID
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```
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※結局havingだけでやる方がよさそうですが、上記サブクエリを効率化するとこう
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``` SQL
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select ID,max(d) from tbl as t1
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where not exists(
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select 1 from tbl as t2
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where d>'2017-12-31'
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and t1.ID=t2.ID
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)
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group by ID
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```
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