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Commit 791cac3

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Adding solutions
1 parent 764cd61 commit 791cac3

17 files changed

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‎dump_file/leetcodedb.sql

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SELECT country_name,
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CASE WHEN AVG(weather_state) <= 15 THEN 'Cold'
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WHEN AVG(weather_state) >= 25 THEN 'Hot'
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ELSE 'Warm'
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END AS weather_type
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FROM weather_1294 w
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INNER JOIN countries_1294 c ON w.country_id = c.country_id
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WHERE EXTRACT(month FROM day) = 11
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GROUP BY country_name;
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SELECT employee_id,
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COUNT(employee_id) OVER (PARTITION BY team_id) AS team_size
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FROM employee_1303
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ORDER BY employee_id;

‎easy/1322. Ads Performance (Easy).sql

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SELECT ad_id,
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COALESCE(ROUND(AVG(
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CASE WHEN action = 'Clicked' THEN 1
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WHEN action = 'Viewed' THEN 0
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ELSE NULL
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END)*100,2),0.00) AS ctr
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FROM ads_1322
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GROUP BY ad_id
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ORDER BY ctr DESC;
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SELECT p.product_name,SUM(o.unit)
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FROM orders_1327 o
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INNER JOIN products_1327 p ON o.product_id = p.product_id
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WHERE DATE_TRUNC('MONTH',o.order_date)::DATE = '2020年02月01日'
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GROUP BY p.product_name
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HAVING SUM(o.unit) >= 100;
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SELECT s.id,s.name
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FROM students_1350 s
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LEFT JOIN departments_1350 d ON s.department_id = d.id
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WHERE d.id IS NULL;
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SELECT eu.unique_id,e.name
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FROM employee_1378 e
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LEFT JOIN employee_uni_1378 eu ON e.id = eu.id
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ORDER BY e.name;

‎easy/1407. Top Travellers (Easy).sql

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SELECT u.name,COALESCE(SUM(r.distance),0) AS travelled_distance
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FROM users_1407 u
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LEFT JOIN rides_1407 r ON u.id = r.user_id
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GROUP BY u.name
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ORDER BY travelled_distance DESC,u.name;
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WITH bins AS (
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SELECT '[0-5>' AS bin, 0 AS min_duration, 5*60 AS max_duration
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UNION ALL
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SELECT '[5-10>' AS bin, 5*60 AS min_duration, 10*60 AS max_duration
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UNION ALL
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SELECT '[10-15>' AS bin, 10*60 AS min_duration, 15*60 AS max_duration
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UNION ALL
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SELECT '15 or more' AS bin, 15*60 as min_duration, 2147483647 AS max_duration
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)
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SELECT b.bin, COUNT(s.session_id) AS total
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FROM bins b
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LEFT JOIN sessions_1435 s
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ON s.duration >= min_duration
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AND s.duration < max_duration
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GROUP BY b.bin;
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SELECT sell_date,COUNT(DISTINCT product) AS num_sold,STRING_AGG(DISTINCT product,',' ORDER BY product) AS products
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FROM activities_1484
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GROUP BY sell_date
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ORDER BY sell_date;

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