選擇sql結果的反轉作爲字符串列表

Question

具有sql例如如下所示，導致一些行具有一個值。 我搜索了不同於SELECT * FROM some_sql的sql，其結果是一行以逗號分隔的值。

WITH some_sql AS (
    SELECT 1 FROM DUAL 
    UNION 
    SELECT 2 FROM DUAL 
) 
SELECT * FROM some_sql 

此SQL導致兩行具有值1和2。 我SEACH導致1,2-而不改變「some_sql」的代碼的SQL。

Answer 1

考慮http://halisway.blogspot.com/2006/08/oracle-groupconcat-updated-again.html

Answer 2

SICE你是11G，你可以使用LISTAGG

WITH some_sql AS (
    SELECT 1 x FROM DUAL 
    UNION 
    SELECT 2 x FROM DUAL 
) 
SELECT LISTAGG(x, ',') WITHIN GROUP(ORDER BY x) FROM some_sql