将SQLite语句移植到Firebird

Question

我的这个select语句在SQLite中完美运行：

SELECT extra, count(extra) AS total FROM (SELECT itemID, item, note, sourceItemID, title, collectionName, tagID, modalityID, extra FROM items INNER JOIN factors ON items.itemID = factors.zotero_itemID WHERE collectionID = :collectionID AND (tagID = 4 OR tagID = 1) GROUP BY item) GROUP BY extra

但是当我尝试在Firebird上运行它时，我收到此错误消息：

Dynamic SQL Error.
SQL error code = -104.
Invalid expression in the select list (not contained in either an aggregate function or the GROUP BY clause).

请有人知道发生了什么事吗？ 最好的问候

Answer 1

SELECT extra, count(extra) AS total 
FROM (SELECT extra 
      FROM items 
      INNER JOIN factors ON items.itemID = factors.zotero_itemID 
      WHERE collectionID = :collectionID 
      AND (tagID = 4 OR tagID = 1) 
      ) t
GROUP BY extra

如果您只需要内部查询count extra，最好不要选择其他人group by，因为您还没有使用聚合函数（在内部查询）。