尝试从sqlite数据库更新数据时，SQL错误或缺少数据库（在＆＃34;。＆＃34;：语法错误）错误

Question

我一直在java中遇到这个错误。我确实看过类似的问题，但他们没有帮助。有人能解决吗？感谢

UPDATE SearchedWords 
SET SearchedWords.NrOfSearches=SearchedWords.NrOfSearches+1 
FROM SearchedWords
INNER JOIN Dictionary ON SearchedWords.WordID=Dictionary.ID 
WHERE Dictionary.Word=? AND SearchedWords.UserID=?;

Answer 1

SQLite不支持JOIN中的UPDATE。这是一个解决方法：

UPDATE SearchedWords 
    SET NrOfSearches = NrOfSearches + 1 
    WHERE EXISTS (SELECT 1
                  FROM Dictionary d
                  WHERE d.ID = SearchedWords.WordID AND
                        d.Word = ?
                 ) AND
          UserID = ?;