Store query result in a variable using in PL/pgSQL

Question

How to assign the result of a query to a variable in PL/pgSQL, the procedural language of PostgreSQL?

I have a function:

CREATE OR REPLACE FUNCTION t         


        

Answer 1

You can use the following example to store a query result in a variable using PL/pgSQL:

 select * into demo from maintenanceactivitytrack ; 
    raise notice'p_maintenanceid:%',demo;