ORA-00923：使用listagg时未找到FROM关键字

Question

SELECT
                m.externalmerchantid AS merchant_merchantID,
                m.legalname,
                m.tradingname,
                m.status AS merchant_status,
                s.subscriptiontype AS subscriptiontype,
                s.externalid                         AS subscription_merchantID,
                s.status                             AS subscription_status,
                s.wayofintegration,
                psp.name,
                s.startdate,
                s.firstactivationdate,
                s.enddate,
                sb.iban,
                sb.sepacreditorid,
        listagg(sst.subschemetypeid, ',')  WITHIN GROUP (ORDER BY s.subscriptionid)
        FROM
                msm_merchant m,
                msm_subscription s,
                msm_subscription_bvn sb,
                psp_serviceprovider psp,
        msm_subscriptionschemetype sst
            WHERE
      s.status = 'ACTIVE'
            AND m.merchantid = s.merchant_merchantid
            AND s.subscriptionid = sb.subscriptionid
            AND m.status = 'ACTIVE'
      AND sst.subscriptionid = s.subscriptionid
            AND m.acquirer_acquirerid = 'RaboNL'
            AND s.serviceprovider_providerid = psp.serviceproviderid;

但是获得错误

ORA-00923: FROM keyword not found where expected
00923. 00000 -  "FROM keyword not found where expected"
*Cause:    
*Action:
Error at Line: 16 Column: 50