从子查询选择中选择字段 [英] select the fields from the subquery selection

问题描述

我有这个查询，只是从ad_media获取字段，但是我不知道如何选择子查询选择中的字段以及从左到ad_params
any的字段确实可以帮助您

I have this query that getting the fields just from ad_media , but i can't figure out how to select also the fields that are in the subquery selection as well as the fields from the left join with ad_params any help thanks indeed

select ad_media.ad_media_id
, ad_media.ad_id 
from ad_media 
where ad_media.ad_id in
(
    select action_states.ad_id 
    from action_states 
    where action_states.state = 'reg'   
    and action_states.action_id = '1' 
    and action_states.timestamp::date between '2018-04-17' and '2018-04-17' 
    and action_states.ad_id in
    (
        select ads.ad_id 
        from ads  
        where ads.category = '2010' 
        and ads.name = 'joe'
    ) 
)  
left join ad_params 
on ad_media.ad_id = ad_params.ad_id;

推荐答案

您可以尝试内部加入而不是子查询：

SELECT ad_media.ad_media_id, ad_media.ad_id 
FROM ad_media 
INNER JOIN action_states ON action_states.ad_id = ad_media.ad_id
INNER JOIN ads ON ads.ad_id = action_states.ad_id
LEFT JOIN ad_params ON ad_media.ad_id = ad_params.ad_id
WHERE action_states.state = 'reg'   
AND action_states.action_id = '1' 
AND action_states.timestamp::DATE BETWEEN '2018-04-17' AND '2018-04-17'
AND ads.category = '2010' AND ads.name = 'joe';

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