How to get SQL that do not use bind variables

Hello

I am trying to identify the SQL code which should benefit from the use of bind variables.
First of all, I tried to get the common signature of all the sql calls, using:
select * from (
select  force_matching_signature, count(1) from v$sql where force_matching_signature<>0 group by force_matching_signature order by 2 desc
) where rownum < 50;
Then I copied these values to the Clipboard and run:
select sql_text from v$sql where force_matching_signature=<<<copied_signature_value>>>;
Now, I want to make it automatically and get only 1 occurrence of each SQL that resembles others by using a query.

I tried this:
select sql_text from
(
select sql_text, force_matching_signature, row_number() over (partition by force_matching_signature order by sql_text desc)rn from v$sql where force_matching_signature <>0
)where rn <2 and rownum < 10 order by force_matching_signature desc
But it is not returning results by showing up at the count (1) from the first query, I've used. How can I change this if I get the results in order of "importance"?




Thank you

And I said. First use the command by then use rownum. I did not mention row_number. Also, there should be no need to add more columns.
Have you tried it? Why it did not work?

example not tested

select * from (
   select sql_text from (select sql_text, force_matching_signature, row_number() over (partition by force_matching_signature order by sql_text desc) rn from v$sql where force_matching_signature != 0)
   where rn = 1
   order by force_matching_signature desc /* add any ordering you like here */
   )
where rownum < 10  /* then filter on the first 10 results */

If you want to order that the statement that found most of the time comes first, say so. However, I don't see how to group in your case.
Maybe like this

example of tested

select * from (
   select cnt, sql_text
   from (select sql_text, force_matching_signature, row_number() over (partition by force_matching_signature order by sql_text desc) rn , count(*) over (partition by force_matching_signature) cnt
         from v$sql
         where force_matching_signature != 0)
   where rn = 1
   order by cnt desc, force_matching_signature desc /* add any ordering you like here */
   )
where rownum < 10  /* then filter on the first 10 results */
;

Published by: Sven w. October 11, 2012 14:49

Published by: Sven w. October 11, 2012 14:51

Published by: Sven w. on October 11, 2012 14:56 - number column added to the output

Tags: Database

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