4.4.4 As with TIMESTAMP, you may NOT perform Addition, Multiplication, Division, or other operations with two DATES.4.4.3 Because the difference of two DATES is an INTEGER, this difference may be added, subtracted, divided, multiplied, or even modulo (%).4.4.2 You may add or subtract an INTEGER to a DATE to produce another DATE.The difference between two DATES is always an INTEGER, representing the number of DAYS difference Many larger INTERVAL values, like the calendar values they reflect, are not constant in length when expressed in smaller INTERVAL values You may NOT (ever) perform Addition, Multiplication, or Division operations with two TIMESTAMPS Multiplication and division of INTERVALS is under development and discussion at this time You may add or subtract an INTERVAL to a TIMESTAMP to produce another TIMESTAMP The difference between two TIMESTAMPs is always an INTERVAL 4.3 Which do I want to use: DATE or TIMESTAMP? I don't need minutes or hours in my value. 4.2 What about TIMESTAMP WITH TIME ZONE?.4 WORKING with DATETIME, DATE, and INTERVAL VALUES.A couple of examples were considered in this write-up to explain the difference between CURRENT_TIMESTAMP and LOCALTIMESTAMP functions. The CURRENT_TIMESTAMP retrieves the date and time along with the time zone, while the LOCALTIMESTAMP function retrieves the date and time without the time zone. The current/latest date and time at which the transaction started can be obtained using the CURRENT_TIMESTAMP and LOCALTIMESTAMP functions. In Postgres, the only difference between the CURRENT_TIMESTAMP and LOCALTIMESTAMP functions is the time zone. That’s all you need to know about the Postgres CURRENT_TIMESTAMP VS LOCALTIMESTAMP functions. The output clarifies that the LOCALTIMESTAMP function keeps only three digits for the seconds and skips the rest of the fractional points. In this example, we specified 3 as a precision parameter, so the CURRENT_TIMESTAMP function retrieves the seconds with only three fractional points. In Postgres, both CURRENT_TIMESTAMP and LOCALTIMESTAMP functions can accept a precision parameter that allows us to specify the fractional seconds up to the specific number of digits: SELECT CURRENT_TIMESTAMP(3) Now, it’s time to implement the LOCALTIMESTAMP function practically: SELECT LOCALTIMESTAMP įrom the resultant output, it is clear that the LOCALTIMESTAMP function returns a timestamp without a time zone.Įxample #2: CURRENT_TIMESTAMP VS LOCALTIMESTAMP With Precision Parameter The resultant output proved that the CURRENT_TIMESTAMP function retrieves the timestamp and the time zone. Let us implement these functions one by one and see where they differ: SELECT CURRENT_TIMESTAMP The CURRENT_TIMESTAMP retrieves the date and time along with the time zone, while the LOCALTIMESTAMP function retrieves the date and time without the time zone.Įxample #1: CURRENT_TIMESTAMP VS LOCALTIMESTAMP in PostgreSQL So, what's the distinction between these two functions? Well! It’s the time zone that makes a key difference. In Postgres, the current/latest date and time at which the transaction started can be obtained using the CURRENT_TIMESTAMP and LOCALTIMESTAMP functions. What is Difference Between the CURRENT_TIMESTAMP and LOCALTIMESTAMP Functions? This write-up will present a comparative analysis of the Postgres CURRENT_TIMESTAMP and LOCALTIMESTAMP functions with examples. For instance, the TO_DATE() function is used for string-to-date conversion, the LOCALTIMESTAMP function retrieves the current date and time, etc. All these functions perform different functionalities on the date and time values. PostgreSQL provides multiple built-in functions to deal with the date and time, such as TO_DATE(), LOCALTIMESTAMP, NOW(), CURRENT_TIMESTAMP, and so on.
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