oracle 行转列，用特殊符号拼接

Posted 2020-12-17 iullor

第一种

函数 wm_content(‘待转列名称‘) 11g 往后，不推荐使用

实例

多表关联时可以使用

(SELECT wm_concat(nvl(B1.OPERA_CODE,‘a‘)) AS OPERA_CODE FROM OPERATION_NAME B1 WHERE T1.OPERA_REQ_NO=B1.OPERA_REQ_NO) AS SURGERY_OPER_CODE

第二种

实例

WITH TEMP AS
 (SELECT ‘CHINA‘ NATION, ‘GUANGZHOU‘ CITY
    FROM DUAL
  UNION ALL
  SELECT ‘CHINA‘ NATION, ‘SHANGHAI‘ CITY
    FROM DUAL
  UNION ALL
  SELECT ‘CHINA‘ NATION, ‘BEIJING‘ CITY
    FROM DUAL
  UNION ALL
  SELECT ‘USA‘ NATION, ‘NEW YORK‘ CITY
    FROM DUAL
  UNION ALL
  SELECT ‘USA‘ NATION, ‘BOSTOM‘ CITY
    FROM DUAL
  UNION ALL
  SELECT ‘JAPAN‘ NATION, ‘TOKYO‘ CITY
    FROM DUAL)
SELECT NATION, LISTAGG(CITY, ‘,‘) WITHIN GROUP(ORDER BY CITY) AS CITIES
  FROM TEMP
 GROUP BY NATION

用法：
LISTAGG(‘待转的列‘,‘分割符号‘) WITHIN GROUP(ORDER BY 列字段) AS XXX 字段 FROM 表 WHERE 条件 group by 分组条件 ;