75 lines
1.7 KiB
MySQL
75 lines
1.7 KiB
MySQL
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-- Tables
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CREATE TABLE IF NOT EXISTS usage_stats(
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rental_id BIGINT PRIMARY KEY,
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duration BIGINT,
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bike_id BIGINT,
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end_date TIMESTAMP,
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end_station_id BIGINT,
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end_station_name TEXT,
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start_date TIMESTAMP,
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start_station_id BIGINT,
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start_station_name TEXT
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);
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INSERT INTO usage_stats
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VALUES (40346508, 360, 12019, TO_TIMESTAMP(1420326360), 424, 'Ebury Bridge, Pimlico', TO_TIMESTAMP(1420326000), 368, 'Harriet Street, Knightsbridge')
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ON CONFLICT DO NOTHING;
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SELECT TO_TIMESTAMP(1420326360);
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CREATE TABLE IF NOT EXISTS read_files(
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file_path TEXT,
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etag TEXT PRIMARY KEY
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);
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CREATE TABLE IF NOT EXISTS bike_points(
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id TEXT PRIMARY KEY,
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common_name TEXT,
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lat REAL,
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lon REAL,
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id_num BIGINT
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);
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CREATE TABLE IF NOT EXISTS accidents(
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id BIGINT PRIMARY KEY,
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lat REAL,
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lon REAL,
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location TEXT,
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date TEXT,
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severity TEXT
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);
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-- indicies
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CREATE INDEX IF NOT EXISTS idx_station_start_and_end_date ON usage_stats (start_station_id, start_date, end_date);
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SELECT COUNT(*) FROM usage_stats;
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SELECT
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min(u.start_station_name) AS startStationName,
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u.end_station_name AS endStationName,
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count(*) AS number,
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round(avg(u.duration)) AS avgDuration
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FROM usage_stats u
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WHERE u.start_station_id = 512 AND u.start_date::DATE >= '2010-01-01'::DATE AND u.start_date::DATE <= '2022-01-15'::DATE
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GROUP BY u.end_station_name
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ORDER BY number DESC
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LIMIT 3;
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SELECT
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MIN(b.id_num) as id,
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MIN(b.common_name) AS commonName,
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MIN(b.lat),
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MIN(b.lon),
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max(u.start_date) AS maxEndDate,
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min(u.start_date) AS maxStartDate
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FROM usage_stats u
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JOIN bike_points b ON u.start_station_id = b.id_num
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WHERE u.start_station_id = 306
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