SUBSTR(LISTAGG(NCT.DESCRIPTION || ',') WITHIN GROUP(ORDER BY ZAB.ABNORMAL_NO),0,LENGTH(LISTAGG(NCT.DESCRIPTION || ',') WITHIN GROUP(ORDER BY ZAB.ABNORMAL_NO))-1) NC_CODE_DESCRIPTION
LISTAGG(NCT.DESCRIPTION , ',') WITHIN GROUP(ORDER BY ZAB.ABNORMAL_NO) NC_CODE_DESCRIPTION
FROM Z_ABNORMAL_BILL ZAB
LEFT JOIN Z_ABNORMAL_BILL_DISPOSE ZABD ON ZABD.ABNORMAL_BILL_BO = ZAB.HANDLE