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我需要将此SELECT转换为ActiveRecord,但我没有得到期望的结果。你可以帮我吗?选择是:将此SELECT转换为ActiveRecord
SELECT SUM(quantity) FROM (SELECT recipients.lang,COUNT(name) AS quantity FROM messages, recipients WHERE messages.lang=recipients.lang AND active=1 GROUP BY lang) AS temp;
非常感谢。
有时其良好的只是使用的find_by_sql。它更快。 – Shreyas 2010-11-12 09:19:30