SQL column name same as PL/SQL variable name - How can this be done in a select statement?

Question

Suppose I have a table:

create table foo (
  col_1     number;
  col_2     number;
);

Then I have the following code

declar         


        

Answer 1

Try this:

   declare
       col_1    number;
       col_2    number;
    begin
       col_1 := 1;
       select foo.col_2 into col_2 from foo where foo.col_1 = col_1;

       dbms_output.put_line(col_2);

    end;
/

Table name or synonym says that it entity linked to the table. Also you can use procedure name, if you do the procedure name.

for example, if proc name is DO, you can do the following:

   select foo.col_2 into DO.col_2 from foo where foo.col_1 = DO.col_1;