Hello,
Yes, you can :-)
Using a functional that returns a table, like in the following example: http://www.postgresqltutorial.com/plpgsql-function-returns-a-table/
You will have to generate a dynamic sql statement for querying your table with the accurate WHERE clause. Like in this example: https://stackoverflow.com/questions/12780275/dynamic-sql-query-in-postgres
Hope this helps
Have a nice day
Thomas
Le mer. 29 août 2018 à 07:11, ss <ss@xxxxxxxxxxx> a écrit :
I have a table with many years as columns. y1976, y2077, .. ,
y2019,y2020 I want to dynamically return a column from a function.
select * from FUNCTION('y2016') .....
select t1.cola t1.colb, t1.colc, t2.y2016 from ..... Where t2.y2016 != 0;
or if I select year y2012 I want FUNCTION('y2012')
select t1.cola t1.colb, t1.colc, t2.y2012 from ..... Where t2.y2012 != 0;
to generalize
select * from FUNCTION( year_column )
select t1.cola t1.colb, t1.colc, t2.year_column from ..... Where
t2.year_column != 0;
is it possible? if so how?
