The ClickHouse
11 USD SELECT purchases.ad_id as ad_id
The number of purchases.calc_usd_sum as calc_usd
purchases.campaign_ad_id AS campaign_ad_id
purchases.campaign_duration AS campaign_duration,
purchases.campaign_price_per_day AS campaign_price_per_day,
purchases.category_id as category_id,
purchases.category_level_2 AS category_level_2,
purchases.category_level_3 AS category_level_3,
purchases.category_level_parent as category_level_parent,
purchases.country_id as country_id,
purchases.created_at as created_at,
purchases.data_chunk_date as data_chunk_date,
purchases.data_version as data_version,
purchases.device as device,
purchases.flow_id as flow_id,
purchases.manager as manager,
purchases.new_old_payer as new_old_payer,
purchases.package_name as package_name
purchases.payment_status as payment_status,
purchases.payment_system_name as payment_system_name,
purchases.purchase_id as purchase_id,
purchases.user_id as user_id
From the purchases
And you need to determine the difference between transaction dates for each user_id.The user may have several transactions (>2) and the difference must be counted from the first transaction to the third, from the second to the third, etc.The date of transaction for each user is determined by request
select user_id, created_at as transaction_date
from purchases
where payment_status=‘success’
The result will be the ClickHouse query, which will add 2 columns of transaction_date and Days Since Previous Date.
Examples of data in the CSV file
Applications 1
Client's review of cooperation with Vladyslav Y.
The ClickHouseThe task is performed professionally and responsibly.
I recommend
Freelancer's review of cooperation with Y H
The ClickHouse10 / 10
A good customer. I recommend it.
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очень интересное задание, могли бы вы более подробно объяснить???
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Спрашивайте!
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разницу нужно считать в днях например
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это можна сделать скриптом, не запросом к БД
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мне нужно именно в бд, дальше буду обрабатывать данные
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сбросьте дамп бд или таблицы
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но с данными
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прикрепила csv файл
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плохой дамп, под запрос не пишется
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а хотя стоп разобрался
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первая строка как названия колонок в файле
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у меня старая БД, и такой запрос как datediff не срабатывает так как надо
если интересует могу сделать страницу, таблицу как угодно, там смогу вывести данные разными запросами.
Если что пишите...
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