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GROUP BY ... WITH ROLLUP是sql中的一個很酷的功能。RAILS是否有GROUP BY ... WITH ROLLUP查詢？
Rails是否支持ROLLUP？
我怎麼能寫這樣的查詢，
.group('column1, column2,....')
A
回答
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沒有ActiveRecord的沒有彙總。 https://code.google.com/p/yii/issues/detail?id=1935 – Mahesh
@Mahesh是否有任何替代方法來獲取子組的總數？我想不出任何。 – Varun
您可以通過使用find_by_sql ref編寫一個sql查詢： - http://api.rubyonrails.org/classes/ActiveRecord/Querying.html – Mahesh