I tried :
WITH posts_tags_cte AS (
SELECT post_id, array_agg(tag_id) as tags
FROM posts_tags
WHERE tag_id in (1, 2)
GROUP BY post_id
)
SELECT posts.id FROM posts_tags_cte JOIN posts ON posts.id =
posts_tags_cte.post_id
WHERE posts_tags_cte.tags @> array[1, 2]::int8[]
But it gives me all the posts.
Thanks,
Arup Rakshit
a...@zeit.io
> On 12-Sep-2018, at 9:14 PM, Arup Rakshit <a...@zeit.io> wrote:
>
> Can you show me the SQL construction? Do I need to use `WITH`?
>
>
> Thanks,
>
> Arup Rakshit
> a...@zeit.io <mailto:a...@zeit.io>
>
>
>
>> On 12-Sep-2018, at 9:13 PM, David G. Johnston <david.g.johns...@gmail.com
>> <mailto:david.g.johns...@gmail.com>> wrote:
>>
>> On Wednesday, September 12, 2018, Arup Rakshit <a...@zeit.io
>> <mailto:a...@zeit.io>> wrote:
>> IN is OR, I want the AND logic. Select posts which has tag 1, 2 and 3 ( tag
>> ids )
>>
>> Build arrays and then use the “contains” operator.
>>
>> David J.
>
