Исходный код вики Группировка с выбором 1 наибольшего в каждой группе | GROUP BY
Версия 4.1 от Alexandr Fokin на 2020/09/18 20:37
Последние авторы
| author | version | line-number | content |
|---|---|---|---|
| 1 | {{code language="sql"}} | ||
| 2 | |||
| 3 | SELECT | ||
| 4 | t1.GroupItem, | ||
| 5 | t1.SortProperty | ||
| 6 | FROM | ||
| 7 | dbo.Table1 t1 | ||
| 8 | JOIN ( | ||
| 9 | SELECT | ||
| 10 | t1.GroupItem, | ||
| 11 | max(t1.SortProperty) AS MaxSortValue | ||
| 12 | FROM | ||
| 13 | dbo.Table1 t1 | ||
| 14 | GROUP BY | ||
| 15 | t1.GroupItem | ||
| 16 | ) AS dt ON t1.GroupItem = dt.GroupItem | ||
| 17 | AND t1.SortProperty = dt.MaxSortValue | ||
| 18 | |||
| 19 | {{/code}} |