可能与使用代码"的标识符有关

Could be related to the indentifier try using "code"

SELECT CATEGORY,ANTIGENNAME,LATINCOMPOSITION,HYCORCODE,FDACLEARANCE,
    LISTAGG(ORCHARDCODE, ';')
     WITHIN GROUP (ORDER BY ORCHARDCODE) as "code"
 from tablename
 group by HYCORCODE