Presto - static date and timestamp in where clause

Question

I\'m pretty sure the following query used to work for me on Presto:

select segment, sum(count)
from modeling_trends
where segment=\'2557172\' and date = \'2016-0         


        

Answer 1

Unlike some other databases, Presto doesn't automatically convert between varchar and other types, even for constants. The cast works, but a simpler way is to use the type constructors:

WHERE segment = '2557172'
  AND date = date '2016-06-23'
  AND count_time BETWEEN timestamp '2016-06-23 14:00:00.000' AND timestamp '2016-06-23 14:59:59.000'

You can see examples for various types here: https://prestosql.io/docs/current/language/types.html