Sql 如何将查询附加到具有其他id值的列值

所需结果：是

重新格式化的\u路径

列值

在这里，我试图将

id

列值附加到

path

的结尾部分（或文件名）中，作为

重新格式化的\u path

列。
我尝试使用

regexp\u substr（路径，[^/]+'，6,6）

，但它只适用于少数列

---

谢谢

您可以使用

SUBSTR

和

INSTR

的组合，如下所示：

    table format:
    id,path,reformated_path
    123,"https://www.ddf.com/wewe/rer/ff/w.jpg","https://www.ddf.com/wewe/rer/ff/123_w.jpg"
    124,"https://www.ddf.com/wewe/rer/ff/eewe/2324.00.jpg","https://www.ddf.com/wewe/rer/ff/eewe/124_2324.00.jpg"
125,"https://www.ddf.com/wewe/rer/ff/eewe/23.00.png","https://www.ddf.com/wewe/rer/ff/eewe/125_23.00.png"

SQL> WITH YOUR_TABLE(ID, PATH) AS
  2  (SELECT 123,'https://www.ddf.com/wewe/rer/ff/w.jpg' FROM DUAL UNION ALL
  3  SELECT 124, 'https://www.ddf.com/wewe/rer/ff/eewe/2324.00.jpg' FROM DUAL)
  4  -- Your query starts from here
  5  SELECT ID, PATH,
  6     SUBSTR(PATH, 1,
  7    INSTR(PATH,'/',-1))
  8    || ID || '_'
  9    || SUBSTR(PATH,
 10       INSTR(PATH,'/',-1)+1) FORMATTED_PATH
 11    FROM YOUR_TABLE;

        ID PATH                                               FORMATTED_PATH
---------- -------------------------------------------------- -------------------------------------------------------
       123 https://www.ddf.com/wewe/rer/ff/w.jpg              https://www.ddf.com/wewe/rer/ff/123_w.jpg
       124 https://www.ddf.com/wewe/rer/ff/eewe/2324.00.jpg   https://www.ddf.com/wewe/rer/ff/eewe/124_2324.00.jpg

SQL>