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Oracle PL/SQL (Procedural Language/Structured Query Language) resources, news, and support articles.

Different error handling behavior between EXECUTE IMMEDIATE and DBMS_SQL (11296)

One of the Q4 2011 playoff quizzes examined the way that user-defined exceptions are handled. If you didn't participate in the playoff, you may want to view this quiz - even try to answer it for yourself - before reading this post.

Q4 2011 Championship Playoff Results

You will find below the rankings for the Q4 2011 playoff; the number next to the player's name is the number of times that player has participated in a playoff. Congratulations first and foremost to our top-ranked players:

1st Place: Frank Schrader, Germany, wins an US$250 Gift Card.
2nd Place: Janis Baiza, Latvia, wins an US$175 Gift Card.
3rd Place: Valentin Nikotin, Russia, wins an US$100 Gift Card.

A Conversation with Hans Forbrich

Hans Forbrich, an Oracle ACE Director, talks about his path to becoming a prized speaker at Oracle User Group meetings around the world. Enjoy all Saurabh Filed under: Oracle Tagged: Oracle, oracle user group, Saurabh, video player

Compiling Incomplete Program Units (9633)

The 25 January quiz tested your knowledge of the minimal amount of code needed to "create" a PL/SQL procedure in the data dictionary, even if the resulting program unit is invalid.

The choices offered were:


The first was scored as incorrect and the last three as correct.

Caclulating Entropy and Gini Index for a partitioned table

20th century has been highlighted by the two notable insights onto the nature of information. In 1948, Claude Shannon published classic paper “A Mathematical Theory of Communication” suggesting quantitative information measure — entropy — as average number of bits needed to store or communicate one symbol in a message. The paper has tremendous impact: it launched the whole new discipline — the Information Theory.

Comparing Schemas: Red Gate Schema Compare for Oracle

This week I attended a webinar by Cary Millsap, organized by Red Gate. It was called "Real Developers DO use Tools" and was focussed on, well, tools. At the end of Cary's talk, James Murtagh showed a demo of their Schema Compare tool. The demo wasn't flawless, but he recovered nicely :) (note to self: don't do live demo's).

Q4 2011 Championship Playoff on 25 January

The 7th quarterly championship playoff of the PL/SQL Challenge will take place on Wednesday, 25 January.

Forty-two players qualified to participate. In this playoff, players will have 30 minutes in which to take five quizzes. Scoring and ranking for the playoff follows the same formula used for the daily quiz.


The 18 January quiz tested your knowledge of the contents of strings returned by a call to DBMS_UTILITY.FORMAT_CALL_STACK, which (roughly speaking) answers the question: "How did I get here?" (with a nod to the Talking Heads, one of my all-time favorite bands)

Iudith Mentzel went exploring and came up with some interesting tidbits that I thought I would share.

Revise Partitioning Concepts in Oracle

Hi all, Partitioning is one of the most stable, proven and efficient features of Oracle. It defines proper segregated format of data management along with boosting up the query performance. Recently, I published my article on Partitioning concepts at Exforsys. The article covers theoretical concepts involved in the feature.

Serializable Transaction Impact Not Seen by Players (9622)

The 10 January quiz tested your knowledge of serializable transactions and system change numbers. Several players ran the verification code and got "b = 0" for the second and fourth choices (9005 and 9007), which would have made them correct (they were marked as incorrect). Here's the report from one player:

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