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Ensure that date is in a range with ice cream cone

In cases when you have a daterange in postgres and you need to ensure that a date falls within that range, you can use Postgres's ice cream cone operator (@>).

dev=# select tsrange('2019-1-1', '2020-1-1') @> '2019-6-1'::timestamp;          
 ?column? 
----------
 t
(1 row)
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