SQL>
SQL>
SQL> -- variable scope
SQL>
SQL> declare
2 l_number number := l_another_number;
3 l_another_number number := 10;
4 begin
5 null;
6 end;
7 /
l_number number := l_another_number;
*
ERROR at line 2:
ORA-06550: line 2, column 24:
PLS-00320: the declaration of the type of this expression is incomplete or malformed
ORA-06550: line 2, column 14:
PL/SQL: Item ignored