回答編集履歴
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ちょうせい
test
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@@ -1 +1,35 @@
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指定日のひとつ前の日付は、指定日より小さいなかで最大(max)を取ればよいです
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```SQL
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create table tbl(id int primary key,d date);
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insert into tbl values
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(1,'2021-08-01'),
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12
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(2,'2021-08-01'),
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(3,'2021-08-02'),
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(4,'2021-08-10'),
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(5,'2021-08-10'),
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(6,'2021-08-11'),
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(7,'2021-08-11'),
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(8,'2021-08-12');
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select * from tbl where d=(
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select max(d) from tbl where d<'2021-08-11'
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);
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```
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