This is the condition contacts.entry_time vs precence_records.created to get the late entries: ( ("substring"(precence_records.created::text, 0, 11) || ' '::text) || contacts.entry_time::text) < precence_records.created::text The precence_records.created is the check in time and contacts.entry_time its the time of the schedule entry time for the employee. Precence_records.employees_perm_id IS NULL Dates, Times and Timestamps in PostgreSQL can be added/subtracted an INTERVAL value: SELECT now ()::time - INTERVAL '10 min'. ( ("substring"(precence_records.created::text, 0, 11) || ' '::text) || contacts.entry_time::text) < precence_records.created::text AND Precence_records.type::text = 'entry'::text ANDĬontacts.id = precence_ntact_id AND ("substring"(precence_records.created::text, 0, 11) || ' '::text) || contacts.entry_time::text AS entry_datetime, The idea is to convert timestamp to epoch, divide by interval desired in minutes then round to get the desired interval. Precence_records.created AS created_datetime, To calculate the difference between the timestamps in PostgreSQL, simply subtract the start timestamp from the end timestamp. The late entries I get with this view: CREATE OR REPLACE VIEW employees_late_entries PostgreSQL internally stores the interval values as seconds, days and months.
Here's more about the EXTRACT() function.I have employees who register their check in/out from their work. If you'd like to calculate the difference between the timestamps in seconds in PostgreSQL, subtract one date from the other (here: arrival - departure) then extract EPOCH from the difference to get it in seconds. The difference will be of the type interval, which means you'll see it in days, hours, minutes, and seconds. Solution 3 (difference in seconds):ĮXTRACT(EPOCH FROM (arrival - departure)) AS difference To calculate the difference between the timestamps in PostgreSQL, simply subtract the start timestamp from the end timestamp. In this solution, the resulting column is also of the type interval. Here, it would be AGE(arrival, departure). If you'd like to get the difference in years, months, days, hours, minutes, and seconds, use the AGE(end, start) function. Solution 2 (difference in years, months, days, hours, minutes, and seconds):
To calculate the difference between the timestamps in PostgreSQL, simply subtract the start timestamp from the end timestamp. PostgreSQL - DATEDIFF - Datetime Difference in Seconds, Days, Months, Weeks etc. ( select patientid, sum(s.duration) as hour, Date(s. We can subtract one or more days from a date in PostgreSQL with the -operator. Solution 1 (difference in days, hours, minutes, and seconds): You'd like to calculate the difference between the arrival and the departure. In the travel table, there are three columns: id, departure, and arrival. The following table lists the behaviors of the basic arithmetic operators. Now, let us see the Date/Time operators and Functions. We had discussed about the Date/Time data types in the chapter Data Types. You have two columns of the type timestamp and you want to calculate the difference between them. PostgreSQL - DATE/TIME Functions and Operators.
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