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Comparing Two Dates

Jim Knicely authored this post.

There are several cool built-in functions that you can use to compare two dates.

Example:

dbadmin=> SELECT today,
dbadmin->        yesterday,
dbadmin->        DATE_EQ(today, yesterday) AS date_equal,
dbadmin->        DATE_GE(today, yesterday) AS date_greater_than_or_equal,
dbadmin->        DATE_GT(today, yesterday) AS date_greater_than,
dbadmin->        DATE_LE(today, yesterday) AS date_less_than_or_equal,
dbadmin->        DATE_LT(today, yesterday) AS date_less_than
dbadmin->   FROM (SELECT sysdate::date AS today,
dbadmin(>                (sysdate-1)::date AS yesterday) foo;
   today    | yesterday  | date_equal | date_greater_than_or_equal | date_greater_than | date_less_than_or_equal | date_less_than
------------+------------+------------+----------------------------+-------------------+-------------------------+----------------
 2018-07-25 | 2018-07-24 | f          | t                          | t                 | f                       | f
(1 row)

Have fun!

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