Simple queries

The following gets the 10 most recently added data points for a table.

SELECT * FROM <database_name>.<table_name>
ORDER BY time DESC
LIMIT 10

The following gets the 5 oldest data points for a specific measure.

SELECT * FROM <database_name>.<table_name>
WHERE measure_name = '<measure_name>'
ORDER BY time ASC
LIMIT 5

The following works with nanosecond granularity timestamps.

SELECT now() AS time_now
, now() - (INTERVAL '12' HOUR) AS twelve_hour_earlier -- Compatibility with ANSI SQL 
, now() - 12h AS also_twelve_hour_earlier -- Convenient time interval literals
, ago(12h) AS twelve_hours_ago -- More convenience with time functionality
, bin(now(), 10m) AS time_binned -- Convenient time binning support
, ago(50ns) AS fifty_ns_ago -- Nanosecond support
, now() + (1h + 50ns) AS hour_fifty_ns_future 

Measure values for multi-measure records are identified by column name. Measure values for single-measure records are identified by measure_value::<data_type>, where <data_type> is one of double, bigint, boolean, or varchar as described in Supported data types. For more information about how measure values are modeled, see Multi-measure records vs. single-measure records.

The following retrieves values for a measure called speed from multi-measure records with a measure_name of IoTMulti-stats.

SELECT speed FROM <database_name>.<table_name> where measure_name = 'IoTMulti-stats'

The following retrieves double values from single-measure records with a measure_name of load.

SELECT measure_value::double FROM <database_name>.<table_name> WHERE measure_name = 'load'