docs(sql): add LAG examples for time-based value comparisons #6577
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Enhance window function documentation with practical examples for calculating differences between current and previous values (e.g., 1h ago). - Add 3 LAG examples to window functions reference with tested queries - Create new 'Compare values' query guide covering common time-based comparison patterns (differences, percentage changes, exact intervals) - Add guide frontmatter for all InfluxDB 3 products All queries validated against InfluxDB 3 Core. Refs: Kapa.ai conversation https://app.kapa.ai/720100f9-ce93-4305-88fd-5fcf71effad7/conversations/4536b79e-3930-4359-87f5-2ad9ccc1917d Starting from: https://docs.influxdata.com/influxdb3/cloud-serverless/reference/sql/functions/window/
Enhance time-based value comparisons with counter metrics patterns using LAG and GREATEST to handle counter resets. - Add counter metrics section with 3 examples (rate, cumulative, intervals) - Include tested queries for non-negative differences and aggregation - Document workarounds for Flux increase() and InfluxQL NON_NEGATIVE_DIFFERENCE() All queries validated against InfluxDB 3 Core. Refs: Kapa.ai conversation https://app.kapa.ai/720100f9-ce93-4305-88fd-5fcf71effad7/conversations/16b13679-0ced-4780-ab58-3d9cacb2d899 Starting from: https://docs.influxdata.com/influxdb3/enterprise/
sanderson
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Dec 1, 2025
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🙌🏻 These examples are great! Only one suggestion.
Co-authored-by: Scott Anderson <[email protected]>
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Summary
Test plan
Refs: Kapa.ai conversation https://app.kapa.ai/720100f9-ce93-4305-88fd-5fcf71effad7/conversations/4536b79e-3930-4359-87f5-2ad9ccc1917d