InfluxDB Tech Tips - Understanding Dependent Tags In Series Cardinality InfluxDB supports writing historical data using the line protocol, with optional timestamp specification in Unix time format, allowing for flexible and efficient data storage. Timestamps have a maximum allowable value of 9223372036854775806 and minimum value of -9223372036854775806, and can be specified with precision using the HTTP API's `precision` query string parameter. Series cardinality is determined by the number of unique tag sets for a single measurement, not just the product of tag values per tag. When querying data with disparate time ranges in the WHERE clause, InfluxQL does not currently support it due to time gaps, and users must split their queries into separate queries for each range.