如何连接oracle中同一列的查询结果？

Question

我有这样的选择查询; select id, email from operators where op_code = 1

查询结果如下;

ID  EMAIL 
--  ----- 
1  abc@abc.com 
2  xyz@xyz.com 
3  def@def.com 

但我需要的电子邮件这样的格式，abc@abc.com,xyz@xyz.com,def@def.com

我如何在Oracle中实现这一目标？

Answer 1

请尝试以下查询，在ORACLE 11G工作：

select 
    listagg(email, ',') 
    within group (order by id) as list 
from operators 
where op_code=1 

SQL Fiddle Demo

OR

SELECT 
    (RTRIM(XMLAGG(xmlelement(X, EMAIL||',')order by id).extract('//text()'),',')) list 
FROM operators 
WHERE op_code=1