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...
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...
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...
6. Truncate a particular date field using PostgreSQL date_trunc() Postgres provides the facility to truncate the date to specific precision. The following query gives you start date of the month based on the value in the date_of_join field. dbase=# select date_trunc('month',date_of_join)...
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...
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 ...
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...
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. ...
DIFFERENCE INITCAP LEFT and RIGHT LEN LENGTH LOWER LPAD and RPAD LTRIM OCTETINDEX OCTET_LENGTH POSITION QUOTE_IDENT QUOTE_LITERAL REGEXP_COUNT REGEXP_INSTR REGEXP_REPLACE REGEXP_SUBSTR REPEAT REPLACE REPLICATE REVERSE RTRIM SOUNDEX SPLIT_PART STRPOS STRTOL SUBSTRING TEXTLEN TRANSLATE TRIM UPPER ...
FunctionMySQLPostgreSQLBigQueryRedshiftPrestoGet difference between two dates at some specificityDATEDIFF()SubtractionDATE_DIFF()DATEDIFF()DATE_DIFF() Here’s how we’d use this in Postgres: 1#Get difference between two dates2SELECTDATE('2019-01-31')-DATE('2019-01-01')3-- 304 ...