SQL

postgres extract date from timestamp

SELECT '2018-07-25 10:30:30'::TIMESTAMP::DATE;

postgres extract time from timestamp

select cast(timestamp '2014-04-03 12:34:00' as time)
-- equivalent to
select '2014-04-03 12:34:00'::time

postgres extract date from timestamp

SELECT DATE(column_name) FROM table_name;

postgres extract date from timestamp

SELECT DATE(SUBSTRING('2018-07-25 10:30:30' FROM 1 FOR 10));