Postgres INTERVAL using value from table

Question

If I want to add 5 days to a date, I can do it using the INTERVAL function:

select create_ts + interval \'5 days\' from abc_company;
         


        

Answer 1

Simply multiply the value with an interval:

select create_ts + num_of_day * interval '1' day 
from abc_company;

Since Postgres 9.4 this is easier done using the make_interval() function:

select create_ts + make_interval(days => num_of_day)
from abc_company;