Question

我正在编写一个查询，根据计数（TOTALCOUNT）删除表中的某些行。我想删除所有计数＆lt; = 5的行。以下是我的询问：

DELETE  FROM NSFABSTRACTS WHERE TOTALCOUNT<=5
  SELECT WORD, COUNT(WORD) AS TOTALCOUNT FROM NSFABSTRACTS
  GROUP BY WORD;

我也试过下面的那个，也没用：

DELETE  FROM NSFABSTRACTS 
  SELECT WORD, COUNT(WORD) AS TOTALCOUNT FROM NSFABSTRACTS
  GROUP BY WORD
WHERE TOTALCOUNT<=5;

它给了我这个错误：

Error report: SQL Error: ORA-00933: SQL command not properly ended 00933. 00000 - "SQL command not properly ended" *Cause: *Action:。

感谢您的帮助。

Answer 1

DELETE  FROM NSFABSTRACTS 
WHERE WORD IN (
                SELECT WORD FROM NSFABSTRACTS
                GROUP BY WORD
                HAVING COUNT(*)<=5
              )

这将删除所有包含在表格中出现小于等于5次的单词的玫瑰。

Answer 2

尝试：

DELETE  FROM NSFABSTRACTS 
WHERE FileID IN
(
  SELECT FILEID
  FROM NSFABSTRACTS 
  GROUP BY WORD, FILEID
  HAVING COUNT(WORD) <=5;
)

假设文件ID是您的主键。

Answer 3

尝试：

DELETE  FROM NSFABSTRACTS 
WHERE FILEID IN
(
     SELECT FILEID FROM NSFABSTRACTS
     GROUP BY FILEID, WORD
     HAVING COUNT(Word)<=5
)

Answer 4

试试此代码

delete from NSFabstracts where fileID in 
(select fileid from nsfabstracts group by word,fileid
having COUNT(word)<=5)

无法从表SQL中删除行

4 个答案: