27 lines
1.0 KiB
SQL
27 lines
1.0 KiB
SQL
SELECT
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CONCAT(DATE(dumper_cycles.t_stamp), ' ', HOUR(dumper_cycles.t_stamp), ':00') AS StartTimestamp,
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CONCAT('H', TIMESTAMPDIFF(HOUR, DATE_FORMAT(dumper_cycles.t_stamp, "%Y-%m-%d %H:00:00"), DATE_FORMAT(NOW(), "%Y-%m-%d %H:00:00"))) AS Hour,
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COALESCE(SUM(dumper_cycles.ulc1 = 1), 0) AS ULC1,
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COALESCE(SUM(dumper_cycles.ulc2 = 1), 0) AS ULC2,
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COALESCE(SUM(dumper_cycles.ulc3 = 1), 0) AS ULC3,
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COALESCE(SUM(dumper_cycles.ulc4 = 1), 0) AS ULC4
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FROM dumper_cycles
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WHERE (dumper_cycles.t_stamp BETWEEN :starttime AND :endtime)
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GROUP BY HOUR(dumper_cycles.t_stamp)
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UNION ALL
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-- Default row with zeros when no dumper cycles exist
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SELECT
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CONCAT(DATE(:starttime), ' ', HOUR(:starttime), ':00') AS StartTimestamp,
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CONCAT('H', TIMESTAMPDIFF(HOUR, DATE_FORMAT(:starttime, "%Y-%m-%d %H:00:00"), DATE_FORMAT(NOW(), "%Y-%m-%d %H:00:00"))) AS Hour,
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0 AS ULC1,
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0 AS ULC2,
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0 AS ULC3,
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0 AS ULC4
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WHERE NOT EXISTS (
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SELECT 1 FROM dumper_cycles
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WHERE dumper_cycles.t_stamp BETWEEN :starttime AND :endtime
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); |