40 lines
1.5 KiB
SQL
40 lines
1.5 KiB
SQL
-- 创建小时雨量统计表
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CREATE TABLE IF NOT EXISTS hourly_rainfall (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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hour_start DATETIME NOT NULL, -- 小时开始时间（例如：2025-04-21 18:00:00）
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hour_end DATETIME NOT NULL, -- 小时结束时间（例如：2025-04-21 19:00:00）
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rainfall INTEGER NOT NULL, -- 该小时的雨量（整数，实际值需除以10）
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min_value INTEGER, -- 该小时内记录的最小累积值
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max_value INTEGER, -- 该小时内记录的最大累积值
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samples INTEGER, -- 该小时内的采样数量
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created_at DATETIME NOT NULL, -- 记录创建时间
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UNIQUE(hour_start) -- 确保每小时只有一条记录
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);
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-- 创建用于计算历史数据的临时视图
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CREATE TEMP VIEW IF NOT EXISTS hourly_data AS
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SELECT
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datetime(strftime('%Y-%m-%d %H:00:00', timestamp)) as hour_start,
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datetime(strftime('%Y-%m-%d %H:59:59', timestamp)) as hour_end,
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MIN(optical_rain) as min_value,
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MAX(optical_rain) as max_value,
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COUNT(*) as samples,
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MAX(optical_rain) - MIN(optical_rain) as rainfall
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FROM sensor_data
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WHERE timestamp >= '2025-04-21 18:00:00'
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GROUP BY strftime('%Y-%m-%d %H', timestamp)
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ORDER BY hour_start;
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-- 将历史数据插入小时雨量表
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INSERT OR IGNORE INTO hourly_rainfall
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(hour_start, hour_end, rainfall, min_value, max_value, samples, created_at)
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SELECT
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hour_start,
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hour_end,
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rainfall,
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min_value,
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max_value,
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samples,
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datetime('now')
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FROM hourly_data;
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