Create a package level variable

    
SQL>
SQL>  create or replace
  2    package variables as
  3      g_public_number number := null;
  4      procedure setPrivateNumber( p_num number );
  5      procedure print_private_number;
  6    end variables;
  7    /

Package created.

SQL>
SQL>  create or replace
  2    package body variables as
  3      myNumber number := null;
  4
  5      procedure setPrivateNumber( p_num number ) is
  6      begin
  7        myNumber := p_num;
  8      end setPrivateNumber;
  9
 10      procedure print_private_number is
 11      begin
 12        dbms_output.put_line( nvl(to_char(myNumber),'null' ) );
 13      end print_private_number;
 14
 15    end variables;
 16    /

Package body created.

SQL>

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Create a package level variable : Package « PL SQL « Oracle PL / SQL

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