Ejemplo de código ORACLE COUNT GROUP BY YEAR

Ejemplo: grupo sql de Oracle por fecha y año

Select count(1), country_of_sale, to_char(datefield, 'YYYY-MM') AS yyyymm
from table 
where country_of_sale IN ('USA', 'EUROPE', 'ASIA')
group by country_of_sale, to_char(datefield, 'YYYY-MM')
order by to_char(datefield, 'YYYY-MM');

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