Sql 从逗号分隔列表中的联接表中获取多个列值

我有3个表，其中包含如下行：

研究报告表格：

REPORT_ID   TOPIC
141         My Report Topic Title
142         Another Report Topic Title
143         Yet Another Report Topic Title
...

REPORT_ID    PROGRAM_AREA_ID
141          6
141          11
141          12
...

PROGRAM_AREA_ID    TITLE
6                  Program Area One
11                 Program Area Two
12                 Program Area Three
...

计划区域报告相关表：

REPORT_ID   TOPIC
141         My Report Topic Title
142         Another Report Topic Title
143         Yet Another Report Topic Title
...

REPORT_ID    PROGRAM_AREA_ID
141          6
141          11
141          12
...

PROGRAM_AREA_ID    TITLE
6                  Program Area One
11                 Program Area Two
12                 Program Area Three
...

程序区域表格：

REPORT_ID   TOPIC
141         My Report Topic Title
142         Another Report Topic Title
143         Yet Another Report Topic Title
...

REPORT_ID    PROGRAM_AREA_ID
141          6
141          11
141          12
...

PROGRAM_AREA_ID    TITLE
6                  Program Area One
11                 Program Area Two
12                 Program Area Three
...

此查询当前正在从下面返回结果：

选择rr.report\u id、rr.topic、pa.title作为程序区域
来自研究报告
内部连接程序\u区域\u报告\u REL parr ON rr.report\u id=parr.report\u id
parr.PROGRAM\u area\u id=pa.PROGRAM\u area\u id上的内部连接程序\u区域pa
其中rr.report_id=141

查询结果：

report_id    topic                    program_areas
141          My Report Topic Title    Program Area One
141          My Report Topic Title    Program Area Two
141          My Report Topic Title    Program Area Three

report_id    topic                    program_areas
141          My Report Topic Title    Program Area One, Program Area Two, Program Area Three    

我需要一个select查询，其结果格式如下：

首选查询结果：

report_id    topic                    program_areas
141          My Report Topic Title    Program Area One
141          My Report Topic Title    Program Area Two
141          My Report Topic Title    Program Area Three

report_id    topic                    program_areas
141          My Report Topic Title    Program Area One, Program Area Two, Program Area Three    

如何在当前查询中完成此操作？

使用

string\u agg（）

函数：-

SELECT rr.report_id, rr.topic, string_agg(pa.title,',') as program_areas 
FROM RESEARCH_REPORTS rr 
INNER JOIN PROGRAM_AREAS_REPORTS_REL parr ON rr.report_id = parr.report_id 
INNER JOIN PROGRAM_AREAS pa ON parr.program_area_id = pa.program_area_id 
WHERE rr.report_id = 141
group by rr.report_id, rr.topic