行列转换和多行合并一个字段

  select company_cd,customer_seq_no,shop_cd,
         MAX(decode(item_cd,'29', item_details_name, NULL)) ITMN_29,
         MAX(decode(item_cd,'30', item_details_name, NULL)) ITMN_30,
         MAX(decode(item_cd,'31', item_details_name, NULL)) ITMN_31
  from(
      SELECT item_cd,company_cd,shop_cd,customer_seq_no,LTRIM(MAX(SYS_CONNECT_BY_PATH(item_details_name,' ')),'　') item_details_name
      FROM
      (
       SELECT item_cd,company_cd,shop_cd,customer_seq_no,item_details_name,MIN(item_details_name) OVER(PARTITION BY item_cd) item_details_name_MIN,
       (ROW_NUMBER() OVER(ORDER BY item_cd,item_details_name))+(DENSE_RANK() OVER (ORDER BY item_cd)) NUMID
       FROM
        (
          select mis.item_cd,tcffs.company_cd,tcffs.shop_cd,tcffs.customer_seq_no,mids.item_details_name
          from t_customer_free_flag_shop tcffs,m_item_details_shop mids,m_item_shop mis
          where tcffs.delete_flag='0' and mids.delete_flag='0' and mis.delete_flag='0'
                and tcffs.company_cd=mis.company_cd and tcffs.shop_cd=mis.shop_cd
                and tcffs.item_cd=mis.item_cd and tcffs.version_number=mis.version_number
                and tcffs.item_details_cd=mids.item_details_cd
         --and tcffs.item_cd and tcfis.item_details_cd in
        --or and tcffs.item_cd and tcfis.item_details_cd in
        --or and tcffs.item_cd and tcfis.item_details_cd in                
        )
      )
      START WITH item_details_name=item_details_name_MIN CONNECT BY NUMID-1=PRIOR NUMID
      GROUP BY item_cd,company_cd,customer_seq_no,shop_cd
  )
  group by company_cd,customer_seq_no,shop_cd


第一个是行列转化，
第二个是多行转一列