51 lines
1.2 KiB
Plaintext
51 lines
1.2 KiB
Plaintext
-- Jam / 50% Full / 100% Full Pie Chart WITH time range support
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WITH filtered AS (
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SELECT
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Name,
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Full,
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Half_Full,
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Jam,
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t_stamp,
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ROW_NUMBER() OVER (PARTITION BY Name ORDER BY t_stamp DESC) AS rn
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FROM lane_data
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WHERE t_stamp BETWEEN :startTime AND :endTime
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),
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latest_records AS (
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SELECT *
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FROM filtered
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WHERE rn = 1
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),
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totals AS (
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SELECT
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GREATEST(COUNT(*), 22) AS total_lanes,
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SUM(CASE WHEN Jam = 1 THEN 1 ELSE 0 END) AS jammed_count,
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SUM(CASE WHEN Half_Full = 1 THEN 1 ELSE 0 END) AS half_full_count,
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SUM(CASE WHEN Full = 1 THEN 1 ELSE 0 END) AS full_count
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FROM latest_records
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)
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SELECT
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'Jammed' AS `Status`,
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COALESCE(jammed_count, 0) AS `Count`,
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ROUND(COALESCE(jammed_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
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FROM totals
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UNION ALL
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SELECT
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'50% Full' AS `Status`,
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COALESCE(half_full_count, 0) AS `Count`,
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ROUND(COALESCE(half_full_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
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FROM totals
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UNION ALL
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SELECT
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'100% Full' AS `Status`,
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COALESCE(full_count, 0) AS `Count`,
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ROUND(COALESCE(full_count, 0) * 100.0 / total_lanes, 2) AS `Percentage (%)`
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FROM totals;
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