Comments on: Identifying Duplicates: Traditional vs. Analytical. Friends of Oracle and Java Thu, 21 May 2015 20:49:51 +0000 hourly 1 By: Alex Nuijten Sun, 07 May 2006 15:02:21 +0000 First of all, thank you for your comments.

To Mr. Ed:
My response to your comment is included in the blog. Because it is not possible to format the TKProf in this comment section (markup is not allowed) I added it to the blog.

To Karl R.:
The database I use on my laptop, where I did these tests is a (10g Release 1). It’s the Personal Edition that I have.

By: Karl r. Fri, 05 May 2006 15:23:00 +0000 Very nice article.
You see in RowSource that a window sort does not reduce the number rows as a group by does and that’s what i think the direct write read is probably the storing of the result of the window sort operation in temp.

PS.: which database version you used?

By: Mr. Ed Fri, 05 May 2006 09:01:33 +0000 Something is fishy about your tkprof. Look at this line:

229376 WINDOW SORT (cr=1383 pr=1809 pw=431 time=3154001 us)

The “time” is over 3 seconds. That’s longer than the elapsed time for the entire query!