回答編集履歴
3
追記
test
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@@ -2,7 +2,7 @@
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```sql
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SELECT
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SELECT ID, 氏名, 誕生日,
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DMAX( "参照日付", "テーブルA", "参照日付 <= " & format([テーブルB].[誕生日],"\#yyyy/mm/dd\#")) as 基準日付
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@@ -16,10 +16,14 @@
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```sql
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SELECT B.
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SELECT B.ID, B.氏名, B.誕生日, (select top 1 A.参照日付 from テーブルA as A where A.参照日付 <= B.[誕生日] order by A.参照日付 desc) AS 基準日付
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(select top 1 A.参照日付 from テーブルA as A where A.参照日付 <= B.[誕生日] order by A.参照日付 desc) as 基準日付
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FROM テーブルB
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FROM テーブルB AS B;
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```
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#追記
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クエリ両方直した。基準日付の名前ダブるのだめみたいね。
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2
修正
test
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@@ -16,7 +16,7 @@
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```sql
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SELECT
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SELECT B.*,
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(select top 1 A.参照日付 from テーブルA as A where A.参照日付 <= B.[誕生日] order by A.参照日付 desc) as 基準日付
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微修正
test
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@@ -18,7 +18,7 @@
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SELECT テーブルB.*,
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(select top 1 参照日付 from テーブルA as A where 参照日付 <= B.[誕生日] order by 参照日付 desc) as 基準日付
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(select top 1 A.参照日付 from テーブルA as A where A.参照日付 <= B.[誕生日] order by A.参照日付 desc) as 基準日付
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FROM テーブルB as B
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