SQL> select * from t;I A D
---------- ---------- -------------------1 b 2008-03-27 10:55:421 a 2008-03-27 10:55:461 d 2008-03-27 10:55:302 z 2008-03-27 10:55:552 t 2008-03-27 10:55:59--- 要獲得如下結果，注意字符串需要按照D列的時間排序：1 d,b,a
2 z,t
create or replace function my_concat(n number)
return varchar2
istype typ_cursor is ref cursor;v_cursor typ_cursor;v_temp varchar2(10);v_result varchar2(4000):= '';v_sql varchar2(200);
beginv_sql := 'select a from t where i=' || n ||' order by d';open v_cursor for v_sql;loopfetch v_cursor into v_temp;exit when v_cursor%notfound;v_result := v_result ||',' || v_temp;end loop;return substr(v_result,2);
end;SQL> select i,my_concat(i) from t group by i;I MY_CONCAT(I)
---------- --------------------1 d,b,a2 z,t
select i,ltrim(max(sys_connect_by_path(a,',')),',') a
from
(
select i,a,d,min(d) over(partition by i) d_min,
(row_number() over(order by i,d))+(dense_rank() over (order by i)) numid
from t
)
start with d=d_min connect by numid-1=prior numid
group by i;
SQL> select i,wmsys.wm_concat(a) from t group by i;I WMSYS.WM_CONCAT(A)
---------- --------------------1 b,a,d2 z,tSQL> select i,wmsys.wm_concat(a)2 from3 (select * from t order by i,d)4 group by i;I WMSYS.WM_CONCAT(A)
---------- --------------------1 d,b,a2 z,t
