PostgreSQL: Add Interval to Timestamp from column value

Question

I need to add minutes coming from an integer column with a timestamp to compare to another column.

Here\'s an example:

 SELECT t1.id_liame, t1.id_ta         


        

Answer 1

You can write your query like this:

SELECT 
   t1.id_liame,
   t1.id_table,
   t1.periodicidade,
   t3.data_extracao,
   CASE
      WHEN(NOW() < (t3.data_extracao + (INTERVAL '1 min' * t1.periodicidade))) 
      THEN 'yes' ELSE 'no'
   END
FROM table1 AS t1
LEFT JOIN liame_has_extracao AS t2 USING(id_liame)
LEFT JOIN extracao AS t3 USING(id_extracao)

As you can see, you can multiply intervals with integers so with INTERVAL '1 minute' you define your base unit and multiply your actual time interval.

Hope that helps