選擇Postgres中所有數組中存在的值

Question

我有一些表ignore與col ignored_entry_ids包含整數的數組。例如：

id  ignored_entry_ids 
1  {1,4,6} 
2  {6,8,11} 
3  {5,6,7} 

如何選擇數字，與陣列的每一行中是否存在？ （在examle 6）

Answer 1

如果您的號碼是唯一的內部數組，你可以做這樣的事情，不認爲它可以在不unnest

with cte as (
    select id, unnest(ignored_entry_ids) as arr 
    from ign 
) 
select arr 
from cte 
group by arr 
having count(*) = (select count(*) from ign) 

sql fiddle demo

進行，如果號碼不獨特，加distinct：

with cte as (
    select distinct id, unnest(ignored_entry_ids) as arr 
    from ign 
) 
select arr 
from cte 
group by arr 
having count(*) = (select count(*) from ign)