2
我在網上查找了一個答案，但無法找到答案。Solr - 1.4中的「group by」
比方說，我在solr中有指向人的文檔。每個文檔（人）都有「公司名稱」和「出生日期」字段。我如何檢索每家公司中年齡最大的人的出生日期？ 我實際上尋找的是在出生日期以及按公司分組時執行最小功能的選項。我不得不提到我使用solr 1.4。
謝謝你在前進，哈達
A
回答
0
有一個叫FieldCollapsing類似的功能，但它僅適用於Solr的3.3及以上。
相關問題
- 1. Django的1.4/1.5控制GROUP BY和HAVING
- 2. order by by group by
- 3. ORDER BY GROUP BY
- 4. group by by desc
- 5. group by by rollup
- 6. group by by django
- 7. $ group by by undefined
- 8. group by by by by mysql
- 9. SQL Group By By By By Count
- 10. Mysql group by by by by？
- 11. sql group by sub group
- 12. GROUP BY
- 13. SQL ORDER BY GROUP BY
- 14. GROUP BY後ORDER BY
- 15. SQL ORDER BY GROUP BY
- 16. Rails/activerecords - group by by
- 17. GROUP BY和ORDER BY
- 18. 多GROUP BY和BY
- 19. MySQL：ORDER BY FIELD/GROUP BY
- 20. distinct或group by by
- 21. Group by by Google BigQuery
- 22. group by by multiple colums
- 23. Doctrine2 Order By By Group By
- 24. LINQ group by by by C＃
- 25. GROUP BY的COUNT（*）
- 26. SQLite的GROUP BY
- 27. LINQ的GROUP BY，ORDER BY值
- 28. GROUP BY Informix中（11.5）
- 29. GROUP BY和XQuery中
- 30. PostgreSQL中的空GROUP BY
您的問題可能會重複。看看[這裏]（http://stackoverflow.com/questions/6413966/getting-maximum-value-of-field-in-solr） – heinob