回答編集履歴
1
追記
test
CHANGED
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@@ -7,3 +7,21 @@
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7
7
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FROM テーブル1;
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8
8
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9
9
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```
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10
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+
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11
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+
Dcount()は低速なので、その場合サブクエリーにすると概ね改善されます。
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12
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+
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13
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+
```SQL
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14
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+
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15
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SELECT ID, Left([ID],3) AS [GROUP]
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16
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+
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17
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, (select Count(*) from テーブル1
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18
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+
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19
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where Left([ID],3) = Left([t1].[ID],3)
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20
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+
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21
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And Mid([ID],4)<= Mid([t1].[ID],4)
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22
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+
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23
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) AS 順位
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24
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+
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25
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FROM テーブル1 as t1;
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26
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+
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27
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+
```
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