ERROR：またはその近くの構文エラー ""

Question

は、TO_CHAR関数の中でWHERE条件を記述する方法がわからない ""

select 
    to_char(date_trunc('day',create_time),'DD Month YYYY') as date, 
    to_char(min(create_time),'HH24:mi') as login_time where login_status = 1, 
    to_char(max(create_time),'HH24:mi') as login_out where login_status = 0 
from 
    users.access_log 
where 
    user_id = 1010 
group by 
    user_id, actionlink_id, date_trunc('day', create_time) 

がまたはその近くにエラーを取得

をこのクエリを解決してください。

Answer 1

は、2つのログインおよびログアウトの行を持ってjoinを使用します。

select 
    to_char(date_trunc('day',create_time),'DD Month YYYY') as date, 
    to_char(min(a.create_time),'HH24:mi') as login_time, 
    to_char(max(b.create_time),'HH24:mi') as login_out 
from users.access_log a 
left join users.access_log b on b.user_id = a.user_id 
    and b.login_status = 0 
    and date_trunc('day', b.create_time) = date_trunc('day', a.create_time) 
    and b.actionlink_id = a.actionlink_id 
where a.user_id = 1010 
and a.login_status = 1 
group by a.user_id, a.actionlink_id, date_trunc('day', a.create_time) 

Answer 2

あなたはCASE expression、ないWHERE必要があります。

select 
    to_char(date_trunc('day',create_time),'DD Month YYYY') as date, 
    case when login_status = 1 then to_char(min(create_time),'HH24:mi') end as login_time, 
    case when login_status = 0 then to_char(max(create_time),'HH24:mi') end as login_out 
from 
    users.access_log 
where 
    user_id = 1010 
group by 
    user_id, actionlink_id, date_trunc('day', create_time)