Comments on: NoCoug SQL Challenge Entry

By: The Tenth Solution « So Many Oracle Manuals, So Little Time

The Tenth Solution « So Many Oracle Manuals, So Little Time — Sun, 09 Aug 2009 15:58:17 +0000

[...] is my own solution to the problem. It is a variant of André Araujo’s solution; it is equally fast but has no logical limitations. However, it does have a hidden physical [...]

By: First International NoCOUG SQL Challenge Is Over ! at Waldar’s SQLing and Datawarehousing Place

Sat, 01 Aug 2009 13:45:50 +0000

[...] think his solution is the one I would have found by myself ! I’m sure the same clever logic could be reused for more problems [...]

By: Results of the First International NoCOUG SQL Challenge « So Many Oracle Manuals, So Little Time

Fri, 31 Jul 2009 19:45:32 +0000

[...] ninth solution—by André Araujo from Australia—used binary arithmetic and common table [...]

By: First International NoCoug SQL Challenge – And the Winner is… « I’m just a simple DBA on a complex production system

Fri, 31 Jul 2009 04:46:20 +0000

[...] wins the challenge for his wonderful solution using Discrete Fourier Transforms; the runner-up is André Araujo from Australia, who used binary arithmetic and common table expressions in his [...]

By: Iggy Fernandez

Iggy Fernandez — Mon, 20 Jul 2009 03:51:40 +0000

The first argument of the ORA-600 error is 15160. The ORA-600 troubleshooting tool in Metalink says that Oracle is “attempting to find a suitable table as the starting point in a complex join operation.” The real problem is that the estimated cost is too high for the optimizer to handle. The workaround is to introduce a Cardinality hint that instructs the query optimizer that the Die table has only one row :-) You will then be able to handle much higher values of the Throws variable.

T1 as (
— Results for the throw of 1 die
select /*+ CARDINALITY(d1 1) */ d1.face_value face_value, sum(d1.probability) probability
from die d1
group by d1.face_value
)

Regards,

Iggy

P.S. The contest is now closed and the winners will be announnced soon.

By: NoCOUG Got Nine, TSQL Got Eleven at Waldar’s SQLing and Datawarehousing Place

Mon, 20 Jul 2009 01:01:53 +0000

[...] I’m the seventh in the list there. As I told before, my favorite solution to this problem is André Aurajo’s one. [...]

By: Who Should Tune SQL: The DBA or The Developer? « So Many Oracle Manuals, So Little Time

Sun, 12 Jul 2009 18:40:31 +0000

[...] ninth solution—by André Araujo from Australia—used binary arithmetic and common table expressions to solve [...]

By: The First International NoCOUG SQL Challenge: Nine Ways To Change a Lightbulb « So Many Oracle Manuals, So Little Time

Wed, 08 Jul 2009 05:17:09 +0000

[...] ninth solution was sent in by André Araujo from Australia who used binary arithmetic and common table expressions [...]

By: Andre Araujo

Andre Araujo — Tue, 02 Jun 2009 22:07:39 +0000

Thanks, Laurent! I appreciate the feedback.

By: Laurent Schneider

Laurent Schneider — Tue, 02 Jun 2009 08:36:58 +0000

I love this solution because it is so easy to understand! Really a fantastic piece of code and impressive explanation, congrats !