Oracle中的列值串聯

Question

請幫我在Oracle中執行以下操作。

我有這樣的事情列名爲id，我需要在級聯

Id 
1 
2 
3 
4 
5 
6 
8 
9 
9 

我需要一個查詢返回1,2,3,4,5,6,7,8,9,9

我怎樣才能做到這一點？

Answer 1

嘗試

select ltrim(max(sys_connect_by_path(id, ',')), ',') 
    from (select id, rownum t 
      from yourtable t) 
connect by prior t = t - 1 
start with t = 1; 

Answer 2

試試這個，

WITH t(ID) AS 
(
SELECT 1 FROM dual 
UNION 
SELECT 2 FROM dual 
UNION 
SELECT 3 FROM dual 
UNION 
SELECT 4 FROM dual 
) 
SELECT LISTAGG(ID, ',') WITHIN GROUP (ORDER BY ID) 
FROM t;