I adapted to my code and worked very well.
Thank you so much, Jeremy.
On Thursday, December 14, 2017 at 6:12:30 PM UTC+3, Jeremy Evans wrote:
>
> On Thursday, December 14, 2017 at 6:57:30 AM UTC-8, Gencer W. G. wrote:
>>
>> What I want to achieve:
>>
>> WITH summary AS (
>> SELECT f.* ,
>> ROW_NUMBER() OVER(PARTITION BY f.name
>> ORDER BY f.version DESC) AS rk
>> FROM files f WHERE f.user_id = 1 and f.is_deleted IS FALSE)
>> SELECT s.*
>> FROM summary s
>> WHERE s.rk = 1"
>>
>> This query works as a RAW SQL. But I am unable to get f.*, row_number()
>> together on Sequel. I only get row_number() for select. Also a little help
>> on writing this query like above (for surrounding by WITH) is appreciated.
>>
>> So far tried:
>>
>> TableModel.select{Sequel[:reserves].*
>> }.select{row_number.function.over(partition: object_name, order:
>> version.desc).as(:rk)}.where(... # i did not finish the query.
>>
>> How do I make sure f* and row number as rk get together with surrounded
>> WITH on Sequel query builder? Or should I use raw?
>>
>
> You don't need to use raw SQL for this:
>
> DB.from{summary.as(:s)}.
> select_all(:s).
> where{s[:rk] =~ 1}.
> with(:summary, DB.from{files.as(:f)}.
> select_all(:f).
> select_append{row_function.function.over(:partition=>f[:name],
> :order=>f[:version].desc).as(:rk)}.
> where{f[:user_id] =~ 1}.
> where{f[:deleted_at] =~ false})
>
> Thanks,
> Jeremy
>
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