This query joins the tracktime, schedules, and stops tables to retrieve the necessary data. The date_part('seconds',(t.arrival - s.arrival)) calculates the difference in seconds between the actual and scheduled arrivals for each stop along a route.where date_part('seconds',(t.arrival - s...
TheAGEdate function calculates how long ago an event occurred. It returns a value representing the number of years, months, and days an event happened or the difference between two given arguments. The syntax is pretty straightforward: applyAGE()to a single timestamp, and your query will retur...
PostgreSQL. The DATE_PART() function in PostgreSQL calculates the difference between two dates. The syntax of the DATE_PART() function is as follows: DATE_PART('interval', date1, date2)。 where: `interval` is the interval that you want to calculate. `date1` is the start date. `date2...
DefinitionReturns the difference between<date1>and<date2>expressed in units of<date_part>. For example, subtracting the dates someone entered and left a band to see how long they were in the band. Example Number of days between March 25, 1986 and February 20, 2021 ...
Essentially, the value represented bytimestamptzand'2015-12-13 21:35:26+02'are the same, indicating the same point in time. The only difference is that the display has been adjusted to reflect your time zone setting. However, if you treat thetimestamptzvalue according to the clock on you...
In this query, we used the julianday() function when calculating the difference between two dates/timestamps. This function returns the number of days, which is what we expect for the trip duration. The flight duration is better presented in hours – thus, we multiply the result by 24 to...
date_diff(str date 1, str date 2):This function is used to find the difference between two specified dates and returns the difference in the number of days. Year (str date):This function is used to return the year portion of the given date in string format. ...
Returns the difference between two dates or times for a given date part, such as a day or month. DATEDIFF (datepart, {date|time|timetz|timestamp}, {date|time|timetz|timestamp}) BIGINT DATE_PART Extracts a date part value from a date or time. DATE_PART (datepart, {date|timestamp})...
If you do want to use an interval, the make_interval() function is quite useful for this:select current_date - make_interval(days => lag_days) from the_table; There is however a difference between the two queries: the first one returns a date value, the second one a timestamp value...
This function returns the current date and time in the session time zone as a value of data type TIMESTAMP. Note The difference between this function and CURRENT_TIMESTAMP is: LOCALTIMESTAMP returns the TIMESTAMP value. CURRENT_IMESTAMP returns the TIMESTAMP WITH TIME ZONE value. Syntax TZ...