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А зачем результаты расчет приводить к тексту?","plain_title":"Добрый день! А зачем результаты расчет приводить к тексту? ","creator":{"public_name":"Степан Матюшов","id":429329,"is_tutor":false},"comments":[{"creator":{"public_name":"Ivan Mamtsev","id":294764,"is_tutor":true},"id":197602,"body":"Ага, видимо явное приведение типов, оставляет их такими и в результативной выборке. Поправлю тесты, чтобы в них вся выборка приводилась к строке.","topic_id":104858},{"creator":{"public_name":"Степан Матюшов","id":429329,"is_tutor":false},"id":197540,"body":"**Ivan Mamtsev**, тест не проходил пока целое в текст не привел о_О ::integer::text \nhttps://ru.hexlet.io/code_reviews/1657063\nСейчас проверить не могу, почему-то связи с сервером вашим нет ","topic_id":104858},{"creator":{"public_name":"Ivan Mamtsev","id":294764,"is_tutor":true},"id":197526,"body":"Добрый день, подскажите, о каких результатах расчета вы говорите? В теории, в практике?","topic_id":104858},{"creator":{"public_name":"Степан Матюшов","id":429329,"is_tutor":false},"id":197537,"body":"**Ivan Mamtsev**, при проверке практики не принимало ответ пока не сделал ::text на числовое поле","topic_id":104858},{"creator":{"public_name":"Ivan Mamtsev","id":294764,"is_tutor":true},"id":197538,"body":"Странно, я не вижу чтобы в решении учителя было приведение типов. Мб тесты не проходили, потому что не было округления?","topic_id":104858}],"communitable":{"parent_entity_name":null,"parent_entity_url":null,"entity_name":"Расходы на рекламу","entity_url":null,"active":true}}],"lesson":{"exercise":{"id":2494,"slug":"marketing_attribution_ad_expenses_exercise","name":null,"state":"active","kind":"exercise","language":"sql","locale":"ru","has_web_view":false,"has_test_view":false,"reviewable":true,"readme":"В таблице `payments` хранится информация о платежах пользователей:\n\n* `user_id`\n* `payment_date` - дата платежа\n* `amount` - сумма\n\n**payments**\n\n| user_id | payment_date | amount |\n|---------|--------------|--------|\n| 1 | 2022-01-01 | 600 |\n| 2 | 2022-01-02 | 700 |\n| 3 | 2022-01-01 | 600 |\n\nВ таблице `registrations` хранится информация о регистрациях пользователей:\n\n* `user_id`\n* `registration_date` - дата регистрации\n* `cookie_id`\n\n**registrations**\n\n| user_id | reg_date | cookie_id |\n|---------|------------|-----------|\n| 1 | 2022-01-01 | 1 |\n| 2 | 2022-01-02 | 2 |\n| 3 | 2022-01-01 | 3 |\n\nВ таблице `visits` хранится информация о посещениях:\n\n* `cookie_id`\n* `ad_id` - может иметь значение `NULL`\n\n**visits**\n\n| cookie_id | ad_id |\n|-----------|-------|\n| 1 | 2 |\n| 2 | NULL |\n\nВ таблице `ads` хранится информация о рекламных компаниях:\n\n* `ad_id`\n* `amount_spent` - расходы на рекламную компанию\n\n**ads**\n\n| ad_id | amount_spent |\n|-------|--------------|\n| 1 | 300 |\n| 2 | 200 |\n\n## solution.sql\n\nСоставьте запрос, который выводит таблицу с полями:\n\n* `ad` - рекламная кампания\n* `amount_spent` - расходы на каждую из рекламных кампаний\n* `visits_cnt` - количество привлеченных пользователей\n* `regs_cnt` - количество зарегистрированных пользователей\n* `cpu` - cost per user, расходы на привлечение одного зарегистрированного пользователя: (расходы на кампанию / количество зарегистрированных пользователей)\n* `payments_cnt` - количество пользователей, совершивших покупку\n* `cppu` - расходы на привлечение одного платящего пользователя: (расходы на кампанию / количество платящих пользователей)\n* `revenue` - выручка\n* `romi` - return on marketing investment, показатель как окупились вложенные деньги: (расходы - выручка) / расходы * 100%. Округлите результат до двух знаков.\n\n### Подсказки\n\n* Перед тем как писать запросы в файл, можно зайти в репл `psql` в терминале и поэкспериментировать\n","prepared_readme":"В таблице `payments` хранится информация о платежах пользователей:\n\n* `user_id`\n* `payment_date` - дата платежа\n* `amount` - сумма\n\n**payments**\n\n| user_id | payment_date | amount |\n|---------|--------------|--------|\n| 1 | 2022-01-01 | 600 |\n| 2 | 2022-01-02 | 700 |\n| 3 | 2022-01-01 | 600 |\n\nВ таблице `registrations` хранится информация о регистрациях пользователей:\n\n* `user_id`\n* `registration_date` - дата регистрации\n* `cookie_id`\n\n**registrations**\n\n| user_id | reg_date | cookie_id |\n|---------|------------|-----------|\n| 1 | 2022-01-01 | 1 |\n| 2 | 2022-01-02 | 2 |\n| 3 | 2022-01-01 | 3 |\n\nВ таблице `visits` хранится информация о посещениях:\n\n* `cookie_id`\n* `ad_id` - может иметь значение `NULL`\n\n**visits**\n\n| cookie_id | ad_id |\n|-----------|-------|\n| 1 | 2 |\n| 2 | NULL |\n\nВ таблице `ads` хранится информация о рекламных компаниях:\n\n* `ad_id`\n* `amount_spent` - расходы на рекламную компанию\n\n**ads**\n\n| ad_id | amount_spent |\n|-------|--------------|\n| 1 | 300 |\n| 2 | 200 |\n\n## solution.sql\n\nСоставьте запрос, который выводит таблицу с полями:\n\n* `ad` - рекламная кампания\n* `amount_spent` - расходы на каждую из рекламных кампаний\n* `visits_cnt` - количество привлеченных пользователей\n* `regs_cnt` - количество зарегистрированных пользователей\n* `cpu` - cost per user, расходы на привлечение одного зарегистрированного пользователя: (расходы на кампанию / количество зарегистрированных пользователей)\n* `payments_cnt` - количество пользователей, совершивших покупку\n* `cppu` - расходы на привлечение одного платящего пользователя: (расходы на кампанию / количество платящих пользователей)\n* `revenue` - выручка\n* `romi` - return on marketing investment, показатель как окупились вложенные деньги: (расходы - выручка) / расходы * 100%. Округлите результат до двух знаков.\n\n### Подсказки\n\n* Перед тем как писать запросы в файл, можно зайти в репл `psql` в терминале и поэкспериментировать\n","has_solution":true,"entity_name":"Расходы на рекламу"},"units":[{"id":8441,"name":"theory","url":"/courses/marketing-attribution/lessons/ad-expenses/theory_unit"},{"id":9965,"name":"quiz","url":"/courses/marketing-attribution/lessons/ad-expenses/quiz_unit"},{"id":8517,"name":"exercise","url":"/courses/marketing-attribution/lessons/ad-expenses/exercise_unit"}],"links":[],"ordered_units":[{"id":8441,"name":"theory","url":"/courses/marketing-attribution/lessons/ad-expenses/theory_unit"},{"id":9965,"name":"quiz","url":"/courses/marketing-attribution/lessons/ad-expenses/quiz_unit"},{"id":8517,"name":"exercise","url":"/courses/marketing-attribution/lessons/ad-expenses/exercise_unit"}],"id":3754,"slug":"ad-expenses","state":"approved","name":"Расходы на рекламу","course_order":140,"goal":"Учимся рассчитывать расходы на рекламную кампанию","self_study":null,"theory_video_provider":"vimeo","theory_video_uid":"866867656","theory":"Следующим этапом в нашей сквозной аналитике является оценка затрат на рекламу. Мы уже провели предварительные шаги, включая анализ клиентов, их платежей, дат и каналов привлечения. Теперь наша задача - добавить информацию о затратах на рекламу.\n\nНа текущем этапе мне хотелось бы поделиться информацией о текущем состоянии рынка рекламы в России. Самыми крупными рекламодателями являются крупные компании, такие как финтех, банки, розничные сети, платформы, телекоммуникационные компании и IT-ориентированные предприятия. Мы видим, что рекламные бюджеты этих компаний составляют миллиарды рублей ежегодно. Это огромный рынок, который основным образом оценивается в сфере онлайн-рекламы.\n\nИз графика справа видно, что интернет-реклама занимает самую большую долю, составляя 324 миллиарда рублей ежегодно. За ней следует наружная реклама, транзитная реклама и цифровые рекламоносители (телевизионная реклама). Доля радиорекламы немного увеличилась, в то время как пресса сильно снизилась, так как люди предпочитают электронные и онлайн-медиа бумажным изданиям.\n\nС учетом того, что интернет в настоящее время является основным источником трафика и рекламы, и даже старшее поколение переходит в онлайн, рекламные бюджеты компаний переключаются на интернет-рекламу.\n\n### Практика\n\nК нашим данным добавим еще одну таблицу _ads_ с затратами на каждый источник рекламы. Для источника Direct полагаем затраты равными нулю.\n\n```sql\nSELECT * FROM ads;\n```\n\n| ad_id | amount_spent |\n| ------ | ------------ |\n| Yandex | 100 |\n| VK | 200 |\n\n<https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/8>\n\nСоберем сводную таблицу\n\n```sql\nSELECT *\nFROM registrations AS r\nLEFT JOIN payments AS p\nON r.user_id = p.user_id\nLEFT JOIN visits AS v\nON v.cookie_id = r.cookie_id\nLEFT JOIN ads AS a\nON a.ad_id = v.ad_id\nLIMIT 3;\n```\n\n| cookie_id | user_id | registration_date | user_id | amount | payment_date | cookie_id | ad_id | ad_id | amount_spent |\n| --------- | ------- | ------------------------ | ------- | ------ | ------------------------ | --------- | ------ | ------ | ------------ |\n| 1 | user1 | 2023-01-01T00:00:00.000Z | user1 | 100 | 2023-02-01T00:00:00.000Z | 1 | Yandex | Yandex | 100 |\n| 2 | user2 | 2023-01-02T00:00:00.000Z | user2 | 200 | 2023-02-02T00:00:00.000Z | 2 | VK | VK | 200 |\n| 3 | user3 | 2023-01-03T00:00:00.000Z | user3 | 300 | 2023-02-03T00:00:00.000Z | 3 | | | |\n\n<https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/9>\n\nТеперь посчитаем сумарные затраты на рекламу по каждому **платному** каналу. Заменив LEFT JOIN на INNER JOIN, уберем канал Direct с нулевыми затратами.\n\n```sql\nSELECT\n v.ad_id AS source,\n COUNT(DISTINCT p.user_id) AS users_count,\n SUM(amount) AS source_amount,\n SUM(amount_spent) AS source_spent\nFROM registrations AS r\nLEFT JOIN payments AS p\nON r.user_id = p.user_id\nLEFT JOIN visits AS v\nON v.cookie_id = r.cookie_id\nINNER JOIN ads AS a\nON a.ad_id = v.ad_id\nGROUP BY 1;\n```\n\n| source | users_count | source_amount | source_spent |\n| ------ | ----------- | ------------- | ------------ |\n| VK | 3 | 1400 | 600 |\n| Yandex | 2 | 600 | 200 |\n\n<https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/10>\n\nНаконец, посчитаем ROI каждого канала\n\n```sql\nSELECT\n v.ad_id AS source,\n COUNT(DISTINCT p.user_id) AS users_count,\n SUM(amount) AS source_amount,\n SUM(amount_spent) AS source_spent,\n (SUM(amount) - SUM(amount_spent)) * 100 / SUM(amount_spent) AS roi\nFROM registrations AS r\nLEFT JOIN payments AS p\nON r.user_id = p.user_id\nLEFT JOIN visits AS v\nON v.cookie_id = r.cookie_id\nINNER JOIN ads AS a\nON a.ad_id = v.ad_id\nGROUP BY 1;\n```\n\n| source | users_count | source_amount | source_spent | roi |\n| ------ | ----------- | ------------- | ------------ | --- |\n| VK | 3 | 1400 | 600 | 133 |\n| Yandex | 2 | 600 | 200 | 200 |\n\n<https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/11>\n"},"lessonMember":null,"courseMember":null,"course":{"start_lesson":{"exercise":null,"units":[{"id":7106,"name":"theory","url":"/courses/marketing-attribution/lessons/intro/theory_unit"}],"links":[],"ordered_units":[{"id":7106,"name":"theory","url":"/courses/marketing-attribution/lessons/intro/theory_unit"}],"id":3148,"slug":"intro","state":"approved","name":"Введение","course_order":100,"goal":"Знакомимся с целями и задачами курса","self_study":null,"theory_video_provider":null,"theory_video_uid":null,"theory":"В этом курсе мы изучим тему «Сквозная аналитика». В рамках обучения мы затронем следующие темы:\n\n* Объяснение концепции и постановка задачи\n* Сопоставление данных из разных систем\n* Оценка эффективности рекламы\n* Расходы на рекламу\n* Реальные данные визитов\n* Сценарии атрибуции\n* Каналы привлечения\n\nВ ходе курса мы научимся оценивать ROI канала привлечения, чтобы понять, откуда нужно привлекать клиентов. Мы узнаем, как сопоставлять данные из разных систем и научимся работать с настоящим кликстримом — данными о визитах.\n\nПолученные навыки пригодятся при выборе каналов привлечения с помощью анализа сценариев атрибуции.\n"},"id":310,"slug":"marketing-attribution","challenges_count":3,"name":"Сквозная аналитика","allow_indexing":true,"state":"approved","course_state":"finished","pricing_type":"paid","description":"На этом курсе вы научитесь оценивать ROI канала привлечения, чтобы понять, откуда нужно привлекать клиентов. Вы узнаете, как сопоставлять данные из разных систем. В итоге научитесь работать с настоящим кликстримом — данными о визитах. Полученные навыки пригодятся, если вы решите выбрать каналы привлечения с помощью анализа сценариев атрибуции.","kind":"advanced","updated_at":"2026-01-20T11:52:23.459Z","language":"other","duration_cache":30480,"skills":["Сопоставлять данные из разных систем","Оценивать ROI канала привлечения","Выбирать каналы привлечения"],"keywords":[],"lessons_count":8,"cover":"https://hexlet.io/rails/active_storage/representations/proxy/eyJfcmFpbHMiOnsiZGF0YSI6ODczOCwicHVyIjoiYmxvYl9pZCJ9fQ==--37c96055a877b0bb836b15d02ade2c1b1491ac99/eyJfcmFpbHMiOnsiZGF0YSI6eyJmb3JtYXQiOiJwbmciLCJyZXNpemVfdG9fZmlsbCI6WzYwMCw0MDBdfSwicHVyIjoidmFyaWF0aW9uIn19--6067466c2912ca31a17eddee04b8cf2a38c6ad17/image.png"},"recommendedLandings":[{"stack":{"id":55,"slug":"data-analytics","title":"Аналитик 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stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-lock "><path d="M5 13a2 2 0 0 1 2 -2h10a2 2 0 0 1 2 2v6a2 2 0 0 1 -2 2h-10a2 2 0 0 1 -2 -2v-6"></path><path d="M11 16a1 1 0 1 0 2 0a1 1 0 0 0 -2 0"></path><path d="M8 11v-4a4 4 0 1 1 8 0v4"></path></svg></div><p style="font-size:var(--mantine-font-size-sm)" class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Сквозная аналитика</p></div><h1 style="--title-fw:var(--mantine-h1-font-weight);--title-lh:var(--mantine-h1-line-height);--title-fz:var(--mantine-h1-font-size);margin-bottom:var(--mantine-spacing-xl)" class="m_8a5d1357 mantine-Title-root" data-order="1">Теория: Расходы на рекламу</h1><script type="application/ld+json">{"@context":"https://schema.org","@type":"LearningResource","name":"Расходы на рекламу","inLanguage":"ru","isPartOf":{"@type":"LearningResource","name":"Сквозная аналитика"},"isAccessibleForFree":"False","hasPart":{"@type":"WebPageElement","isAccessibleForFree":"False","cssSelector":".paywalled"}}</script><div class=""><div style="--alert-color:var(--mantine-color-indigo-light-color);margin-bottom:var(--mantine-spacing-lg);font-size:var(--mantine-font-size-lg)" class="m_66836ed3 mantine-Alert-root" id="mantine-_R_remqrdub_" role="alert" aria-describedby="mantine-_R_remqrdub_-body" aria-labelledby="mantine-_R_remqrdub_-title"><div class="m_a5d60502 mantine-Alert-wrapper"><div class="m_667f2a6a mantine-Alert-icon"><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="tabler-icon tabler-icon-rocket "><path d="M4 13a8 8 0 0 1 7 7a6 6 0 0 0 3 -5a9 9 0 0 0 6 -8a3 3 0 0 0 -3 -3a9 9 0 0 0 -8 6a6 6 0 0 0 -5 3"></path><path d="M7 14a6 6 0 0 0 -3 6a6 6 0 0 0 6 -3"></path><path d="M14 9a1 1 0 1 0 2 0a1 1 0 1 0 -2 0"></path></svg></div><div class="m_667c2793 mantine-Alert-body"><div class="m_6a03f287 mantine-Alert-title"><span id="mantine-_R_remqrdub_-title" class="m_698f4f23 mantine-Alert-label">Полный доступ к материалам</span></div><div id="mantine-_R_remqrdub_-body" class="m_7fa78076 mantine-Alert-message"><div style="--group-gap:var(--mantine-spacing-md);--group-align:center;--group-justify:space-between;--group-wrap:wrap" class="m_4081bf90 mantine-Group-root"><p class="mantine-focus-auto m_b6d8b162 mantine-Text-root">Зарегистрируйтесь и получите доступ к этому и десяткам других курсов</p><a style="--button-height:var(--button-height-xs);--button-padding-x:var(--button-padding-x-xs);--button-fz:var(--mantine-font-size-xs);--button-bg:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-hover:linear-gradient(45deg, var(--mantine-color-blue-filled) 0%, var(--mantine-color-cyan-filled) 100%);--button-color:var(--mantine-color-white);--button-bd:none" class="mantine-focus-auto mantine-active m_77c9d27d mantine-Button-root m_87cf2631 mantine-UnstyledButton-root" data-variant="gradient" data-size="xs" href="/u/new"><span class="m_80f1301b mantine-Button-inner"><span class="m_811560b9 mantine-Button-label">Зарегистрироваться</span></span></a></div></div></div></div></div><div class="paywalled m_d08caa0 mantine-Typography-root"><p>Следующим этапом в нашей сквозной аналитике является оценка затрат на рекламу. Мы уже провели предварительные шаги, включая анализ клиентов, их платежей, дат и каналов привлечения. Теперь наша задача - добавить информацию о затратах на рекламу.</p>
<p>На текущем этапе мне хотелось бы поделиться информацией о текущем состоянии рынка рекламы в России. Самыми крупными рекламодателями являются крупные компании, такие как финтех, банки, розничные сети, платформы, телекоммуникационные компании и IT-ориентированные предприятия. Мы видим, что рекламные бюджеты этих компаний составляют миллиарды рублей ежегодно. Это огромный рынок, который основным образом оценивается в сфере онлайн-рекламы.</p>
<p>Из графика справа видно, что интернет-реклама занимает самую большую долю, составляя 324 миллиарда рублей ежегодно. За ней следует наружная реклама, транзитная реклама и цифровые рекламоносители (телевизионная реклама). Доля радиорекламы немного увеличилась, в то время как пресса сильно снизилась, так как люди предпочитают электронные и онлайн-медиа бумажным изданиям.</p>
<p>С учетом того, что интернет в настоящее время является основным источником трафика и рекламы, и даже старшее поколение переходит в онлайн, рекламные бюджеты компаний переключаются на интернет-рекламу.</p>
<h3 id="heading-3-1">Практика</h3>
<p>К нашим данным добавим еще одну таблицу <em>ads</em> с затратами на каждый источник рекламы. Для источника Direct полагаем затраты равными нулю.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">SELECT * FROM ads;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<div style="--table-min-width:calc(50rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_a100c15 mantine-TableScrollContainer-scrollContainer m_d57069b5 mantine-ScrollArea-root"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-offset-scrollbars="x" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_62259741 mantine-TableScrollContainer-scrollContainerInner"><table><thead><tr><th>ad_id</th><th>amount_spent</th></tr></thead><tbody><tr><td>Yandex</td><td>100</td></tr><tr><td>VK</td><td>200</td></tr></tbody></table></div></div></div></div>
<p><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/8" rel="noopener noreferrer" target="_blank">https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/8</a></p>
<p>Соберем сводную таблицу</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">SELECT *
FROM registrations AS r
LEFT JOIN payments AS p
ON r.user_id = p.user_id
LEFT JOIN visits AS v
ON v.cookie_id = r.cookie_id
LEFT JOIN ads AS a
ON a.ad_id = v.ad_id
LIMIT 3;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<div style="--table-min-width:calc(50rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_a100c15 mantine-TableScrollContainer-scrollContainer m_d57069b5 mantine-ScrollArea-root"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-offset-scrollbars="x" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_62259741 mantine-TableScrollContainer-scrollContainerInner"><table><thead><tr><th>cookie_id</th><th>user_id</th><th>registration_date</th><th>user_id</th><th>amount</th><th>payment_date</th><th>cookie_id</th><th>ad_id</th><th>ad_id</th><th>amount_spent</th></tr></thead><tbody><tr><td>1</td><td>user1</td><td>2023-01-01T00:00<div></div>.000Z</td><td>user1</td><td>100</td><td>2023-02-01T00:00<div></div>.000Z</td><td>1</td><td>Yandex</td><td>Yandex</td><td>100</td></tr><tr><td>2</td><td>user2</td><td>2023-01-02T00:00<div></div>.000Z</td><td>user2</td><td>200</td><td>2023-02-02T00:00<div></div>.000Z</td><td>2</td><td>VK</td><td>VK</td><td>200</td></tr><tr><td>3</td><td>user3</td><td>2023-01-03T00:00<div></div>.000Z</td><td>user3</td><td>300</td><td>2023-02-03T00:00<div></div>.000Z</td><td>3</td><td></td><td></td><td></td></tr></tbody></table></div></div></div></div>
<p><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/9" rel="noopener noreferrer" target="_blank">https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/9</a></p>
<p>Теперь посчитаем сумарные затраты на рекламу по каждому <strong>платному</strong> каналу. Заменив LEFT JOIN на INNER JOIN, уберем канал Direct с нулевыми затратами.</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">SELECT
v.ad_id AS source,
COUNT(DISTINCT p.user_id) AS users_count,
SUM(amount) AS source_amount,
SUM(amount_spent) AS source_spent
FROM registrations AS r
LEFT JOIN payments AS p
ON r.user_id = p.user_id
LEFT JOIN visits AS v
ON v.cookie_id = r.cookie_id
INNER JOIN ads AS a
ON a.ad_id = v.ad_id
GROUP BY 1;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<div style="--table-min-width:calc(50rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_a100c15 mantine-TableScrollContainer-scrollContainer m_d57069b5 mantine-ScrollArea-root"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-offset-scrollbars="x" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_62259741 mantine-TableScrollContainer-scrollContainerInner"><table><thead><tr><th>source</th><th>users_count</th><th>source_amount</th><th>source_spent</th></tr></thead><tbody><tr><td>VK</td><td>3</td><td>1400</td><td>600</td></tr><tr><td>Yandex</td><td>2</td><td>600</td><td>200</td></tr></tbody></table></div></div></div></div>
<p><a style="text-decoration:underline" class="mantine-focus-auto m_849cf0da m_b6d8b162 mantine-Text-root mantine-Anchor-root" data-underline="hover" href="https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/10" rel="noopener noreferrer" target="_blank">https://www.db-fiddle.com/f/2gR99rUuRhS4FftgVAwZWo/10</a></p>
<p>Наконец, посчитаем ROI каждого канала</p>
<div style="margin-bottom:var(--mantine-spacing-lg)" class="m_e597c321 mantine-CodeHighlight-codeHighlight" dir="ltr"><div class="m_be7e9c9c mantine-CodeHighlight-controls"><button style="--ai-bg:transparent;--ai-hover:transparent;--ai-color:inherit;--ai-bd:none" class="mantine-focus-auto mantine-active m_d498bab7 mantine-CodeHighlight-control m_8d3f4000 mantine-ActionIcon-root m_87cf2631 mantine-UnstyledButton-root" data-variant="none" type="button" aria-label="Copy code"><span class="m_8d3afb97 mantine-ActionIcon-icon"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" stroke-width="2" stroke="currentColor" fill="none" stroke-linecap="round" stroke-linejoin="round"><path stroke="none" d="M0 0h24v24H0z" fill="none"></path><path d="M8 8m0 2a2 2 0 0 1 2 -2h8a2 2 0 0 1 2 2v8a2 2 0 0 1 -2 2h-8a2 2 0 0 1 -2 -2z"></path><path d="M16 8v-2a2 2 0 0 0 -2 -2h-8a2 2 0 0 0 -2 2v8a2 2 0 0 0 2 2h2"></path></svg></span></button></div><div style="--scrollarea-scrollbar-size:calc(0.25rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_f744fd40 mantine-CodeHighlight-scrollarea m_d57069b5 mantine-ScrollArea-root" dir="ltr"><div style="overflow-x:hidden;overflow-y:hidden;overscroll-behavior-inline:none" class="m_c0783ff9 mantine-ScrollArea-viewport" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><pre class="m_2c47c4fd mantine-CodeHighlight-pre" style="padding:0"><code class="m_5caae6d3 mantine-CodeHighlight-code">SELECT
v.ad_id AS source,
COUNT(DISTINCT p.user_id) AS users_count,
SUM(amount) AS source_amount,
SUM(amount_spent) AS source_spent,
(SUM(amount) - SUM(amount_spent)) * 100 / SUM(amount_spent) AS roi
FROM registrations AS r
LEFT JOIN payments AS p
ON r.user_id = p.user_id
LEFT JOIN visits AS v
ON v.cookie_id = r.cookie_id
INNER JOIN ads AS a
ON a.ad_id = v.ad_id
GROUP BY 1;</code></pre></div></div></div><button class="mantine-focus-auto m_c9378bc2 mantine-CodeHighlight-showCodeButton m_87cf2631 mantine-UnstyledButton-root" data-hidden="true" type="button">Expand code</button></div>
<div style="--table-min-width:calc(50rem * var(--mantine-scale));--sa-corner-width:0px;--sa-corner-height:0px" class="m_a100c15 mantine-TableScrollContainer-scrollContainer m_d57069b5 mantine-ScrollArea-root"><div style="overflow-x:hidden;overflow-y:hidden" class="m_c0783ff9 mantine-ScrollArea-viewport" data-offset-scrollbars="x" data-scrollbars="xy"><div class="m_b1336c6 mantine-ScrollArea-content"><div class="m_62259741 mantine-TableScrollContainer-scrollContainerInner"><table><thead><tr><th>source</th><th>users_count</th><th>source_amount</th><th>source_spent</th><th>roi</th></tr></thead><tbody><tr><td>VK</td><td>3</td><td>1400</td><td>600</td><td>133</td></tr><tr><td>Yandex</td><td>2</td><td>600</td><td>200</td><td>200</td></tr></tbody></table></div></div></div></div>
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