SQL задачи
SQL задачи для подготовки к собеседованию. SQL тесты для проверки знаний. № 7065181110 SQL запросы к конкретной Базе данных с решением и разбором По вопросам рекламы: @anothertechrock
Show more📈 Analytical overview of Telegram channel SQL задачи
Channel SQL задачи (@sqlquestions) in the Russian language segment is an active participant. Currently, the community unites 10 008 subscribers, ranking 11 796 in the Technologies & Applications category and 63 553 in the Russia region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 10 008 subscribers.
According to the latest data from 30 August, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -29 over the last 30 days and by 2 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 9.75%. Within the first 24 hours after publication, content typically collects 5.68% reactions from the total number of subscribers.
- Post reach: On average, each post receives 976 views. Within the first day, a publication typically gains 568 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 6.
- Thematic interests: Content is focused on key topics such as sql, sqlquestions, шапка, order_table, архитектура.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“SQL задачи для подготовки к собеседованию.
SQL тесты для проверки знаний.
№ 7065181110
SQL запросы к конкретной Базе данных с решением и разбором
По вопросам рекламы: @anothertechrock”
Thanks to the high frequency of updates (latest data received on 31 August, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
SELECT allergies, COUNT(*) AS total_diagnosis FROM patients WHERE allergies IS NOT NULL GROUP BY allergies ORDER BY total_diagnosis DESC;#задача
patients все аллергии (allergies), упорядоченные по их количеству (total_diagnosis - тоже вывести). Удалите из запроса значения NULL.
#задачаSELECT first_name, last_name, 'Patient' as role FROM patients union all select first_name, last_name, 'Doctor' from doctors;#задача
patients и doctors имена, фамилии и роли (first_name, last_name, role) пациентов и докторов. Роли будут, соответственно, "Patient" или "Doctor".
#задачаРеклама. ООО «Отус онлайн-образование», ОГРН 1177746618576, www.otus.ruРеклама. ООО «Отус онлайн-образование», ОГРН 1177746618576, www.otus.ruSELECT city, COUNT(*) AS num_patients FROM patients GROUP BY city ORDER BY num_patients DESC, city asc;#задача
patients общее число пациентов (num_patients) по городам. Результат нужно отсортировать в порядке убывания по количеству пациентов, а затем, в порядке возрастания, по названиям городов.
#задачаSELECT patient_id, diagnosis FROM admissions GROUP BY patient_id, diagnosis HAVING COUNT(*) > 1;#задача
admissions пациентов, которые неоднократно обращались к врачу по поводу одного и того же диагноза. Вывести patient_id и diagnosis.
#задача