在Postgres中的Array字段中搜索

Question

I have the following table structure here countries column is of array type.

 id | name  |             countries             
----+-------+-----------------------------------
  1 | Asia  | {india,china,pakistan,bangladesh}
  2 | World | {india,pakistan,srilanka}

To find all rows of china or sriLanka I use below query:

SELECT * 
FROM country_list 
WHERE 'china' = ANY(country_list.countries) 
   OR 'srilanka' = ANY(country_list.countries);

Can we have any better way to do this just like In operator?

Maybe something like, SELECT * FROM country_list WHERE name in ('Asia','World'); ?

Answer 1

You can use the && overlaps operator :

select *
from country_list
where countries && array['china','srilanka'];

Answer 2

尝试类似此查询。

SELECT * FROM table WHERE name @> ARRAY['s']::varchar[]