以前行的累积数组？

Question

是否存在将先前的ID推入数组的查询，这将导致：

id  c_array
-----------------
1  {}
2  {1}
3  {1,2}
4  {1,2,3}

Answer 1

我认为您希望将array_agg聚合用作窗口函数。

SELECT
  id,
  array_agg(id) OVER (ORDER BY id) AS c_array
FROM the_table

Answer 2

尝试这样

select id, array(select l.id from table1 l where l.id< i.id order by id) as 
c_Arr from table1 i