RE: sql question

Igor, 
I think it should be:

select SUBSTR(hint,  INSTR(hint,' ') + 1, LENGTH(hint) - INSTR(hint,' ') -
1),
       count(*)
  from dba_outline_hints
 where hint like '%INDEX%'
GROUP BY (SUBSTR(hint,  INSTR(hint,' ') + 1, LENGTH(hint) - INSTR(hint,' ')
- 1));

--List of indices not used:
Select index_name 
  from user_indexes 
 where index_name not in ( 
    Select distinct SUBSTR(hint,  INSTR(hint,' ') + 1, LENGTH(hint) -
INSTR(hint,' ') - 1)
      from dba_outline_hints
     where hint like '%INDEX%'
         )

(INSTR changed)

Rob
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