sql - 如何排序由XMLAGG函数聚合的字段？

Question

我有下表:

Part_number   seq_nbr    Super_narrative
1                1        When replacing
1                2        part  with following parts
1                3        note:follwing are now available
1                4        with the organization 

我正在使用XMLAGG将super_narrative聚合在对应于part_number的1行中。

SELECT serv_part_nbr, rtrim (xmlagg (xmlelement (e, Super_narrative || ', ')).extract ('//text()'), ',') PHRASE_TEXT 
FROM BL_MACS_SUPERSEDENCE_NOTE
GROUP BY part_number

但是我想根据 super_narrative聚合 seq_nbr。

怎么做？？

Answer 1

您没有提到DBMS，但是一个疯狂的猜测是:

SELECT serv_part_nbr
              , rtrim (xmlagg (xmlelement(e, Super_narrative || ', ') order by seq_nbr ).extract ('//text()'), ','
                          ) PHRASE_TEXT 
 FROM BL_MACS_SUPERSEDENCE_NOTE
 GROUP BY part_number