Исходный код вики Группировка с выбором 1 наибольшего в каждой группе | GROUP BY
Версия 6.1 от Alexandr Fokin на 2021/10/25 11:34
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| author | version | line-number | content |
|---|---|---|---|
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6.1 | 1 | qtest |
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4.1 | 2 | {{code language="sql"}} |
| 3 | |||
| 4 | SELECT | ||
| 5 | t1.GroupItem, | ||
| 6 | t1.SortProperty | ||
| 7 | FROM | ||
| 8 | dbo.Table1 t1 | ||
| 9 | JOIN ( | ||
| 10 | SELECT | ||
| 11 | t1.GroupItem, | ||
| 12 | max(t1.SortProperty) AS MaxSortValue | ||
| 13 | FROM | ||
| 14 | dbo.Table1 t1 | ||
| 15 | GROUP BY | ||
| 16 | t1.GroupItem | ||
| 17 | ) AS dt ON t1.GroupItem = dt.GroupItem | ||
| |
5.1 | 18 | --AND t1.SortProperty = dt.MaxSortValue |
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4.1 | 19 | |
| 20 | {{/code}} |