How to implement "SELECT INTO" in Oracle with PostgreSQL commands?

I have seen many explanations about SELECT INTO in the oracle clause. I found a difference in applying SELECT INTO in Oracle and other SQL databases. In Oracle, the SELECT INTO statement retrieves values from one or more database tables (as the SQL SELECT statement does) and stores them in variables (which the SQL SELECT statement does not do). Whereas in Postgres, SELECT INTO creates a new table from the results of a query. I want to apply/implement such a thing in Postgres. What is the appropriate command or statement there? Here is my Oracle query: SELECT COUNT(1) INTO ada FROM atk_history_qty WHERE tgl BETWEEN TO_DATE ('2014/02/01', 'yyyy/mm/dd') AND TO_DATE ('2014/02/28', 'yyyy/mm/dd');