![](/img/trans.png)
[英]SQL: Column Must Appear in the GROUP BY Clause Or Be Used in an Aggregate Function
[英]PGError: ERROR: column “inboxes.id” must appear in the GROUP BY clause or be used in an aggregate function
我對MySQL數據庫有以下查詢:
SELECT inboxes.*
, count(inboxes.conv) AS times
, max(created_at) AS created_at
FROM `inboxes`
WHERE to_user = 2
OR account_id = 2
GROUP BY conv
ORDER BY id DESC
該查詢可在我的本地主機上運行,但是如果將其部署到Heroku,則會收到此錯誤:
PGError: ERROR: column "inboxes.id" must appear in the GROUP BY clause or
be used in an aggregate function
您需要在GROUP BY
指定要選擇的所有字段,即:
SELECT inboxes.id, count(inboxes.conv) AS times, max(created_at) as created_at FROM
WHERE (to_user = 2 OR account_id = 2) GROUP BY inboxes.id, conv ORDER BY inboxes.id DESC
為避免將來出現此類問題,請在本地安裝postgres並使用與生產環境相同的數據庫開發應用程序。
您應該擺脫inboxes.*
。 列出您需要提取的每個參數。
所有參數都必須分組( GROUP BY
)或與組函數一起使用( MAX
等)。
我不能告訴你為什么它可以在你的本地主機上工作。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.