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 Single table vs. multiple tables.

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'