BigQuery中的RANK（）具有或Where Where子句

Question

在BigQuery中，我有一個查詢使用RANK()函數按用戶的總數對用戶進行分組。我只關心前10名用戶。目前，我在子選擇中執行RANK()函數，WHERE子句生活在父查詢中以限制結果。有人可以向我解釋如何在沒有父查詢的情況下完成此操作嗎？我想運行查詢看起來是這樣的：

SELECT source, user, count(tweet_id) as total, max(friends) as friends, 
RANK() OVER (PARTITION BY source ORDER BY total DESC, friends DESC) as user_rank 
FROM tweets 
GROUP BY source, user 
HAVING user_rank <= 10 

但我得到的錯誤：字段「user_rank」在表中找不到「鳴叫」。我可以使用user_rank ORDER BY，只是不過濾。

感謝您的任何建議！

Answer 1

您可能需要做一些像

SELECT source, user, total, friends, user_rank 

FROM (
    SELECT source, user, count(tweet_id) as total, max(friends) as friends, 
    RANK() OVER (PARTITION BY source ORDER BY total DESC, friends DESC) as user_rank 
    FROM tweets 
    GROUP BY source, user 
) 

HAVING user_rank <= 10