In PostgreSQL, the NOW() the function is used to return the current date and time. This function returns a timestamp value, which represents the current date and time in the time zone of the PostgreSQL server.
The NOW() the function can be used in various ways in a PostgreSQL query. For example, you could use it to insert the current date and time into a table like this:
INSERT INTO timetable (event_time) VALUES (NOW());
SELECT * FROM timetable WHERE event_time >= NOW() - INTERVAL '1 day';
In this example, the query would return all rows from the events table where the event_time column is greater than or equal to the current date and time minus one day.
Overall, the NOW() function is a useful and convenient way to work with date and time values in PostgreSQL. It allows you to easily insert the current date and time into a table, or to use the current date and time as part of a filter or comparison in a query.
