Instruction
Good! The query worked this time. Intervals are typically used with BETWEEN to select facts from a given day, month, year etc. Take a look:
SELECT id FROM aircraft WHERE produced_date >= '2010-01-01' AND produced_date < '2010-01-01'::date + INTERVAL '1 year';
This query will look for aircraft produced in 2010. Note we needed to cast the string to date with the :: operator in order to add an interval.
Exercise
Show the id and the model for all the aircraft produced in 2014 and 2015.



