SQL> SELECT tname from tab where tname='OPERATION';

no rows selected

SQL> SELECT tname from tab where tname like 'OPERATION%';

TNAME
--------------------------------------------------------------------------------
OPERATION

SQL> SELECT length('OPERATION') from tab where tname like 'OPERATION%';

LENGTH('OPERATION')
------------------------
                       9

SQL> SELECT length(tname) from tab where tname like 'OPERATION%';

LENGTH(TNAME)
-------------
           10