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Simple SQL with and without Inline Views

October 21, 2011 (Forward to the Next Post in the Series) Sometimes it is interesting to take a step back from some of the more difficult to construct SQL statements, and just put together something simple.  The following request recently arrived through an ERP mailing list: “I want to find the last ship date for all the [...]

Brain Teaser: Why is this Query Performing a Full Table Scan

September 14, 2011 While taking a look at the OTN threads this morning, I found an interesting test case, where the OP was asking why a query used a full table scan and not an index range scan.  The OP would like for the query to use the index without using a hint in the query.  [...]

The New Order Oracle Coding Challenge 4 – Tic Tac Toe

(Back to the Previous Post in the Series) Tic Tac Toe, the game of X’s and O’s, was an oddly popular game in elementary school.  When playing the game you quickly learn a couple of rules: Because X always places his mark first (alternating between X and O), there is an unfair advantage for the player placing [...]

The New Order Oracle Coding Challenge 3 – Mind Boggle

August 5, 2011 (Modified August 7, 2011) (Back to the Previous Post in the Series) (Forward to the Next Post in the Series) In part 1 of this series the challenge was to simply reverse the order of digits in the numbers from 1 to 1,000,000 to find that cases where the numbers formed by the reverse ordered digits [...]

The New Order Oracle Coding Challenge 2

August 2, 2011 (Back to the Previous Post in the Series) (Forward to the Next Post in the Series) In the previous article in this series we tried to develop different methods for identifying special numbers between 1 and 1,000,000, such that the number formed by reversing the order of the digits will evenly divide into the original number.  [...]

The New Order Oracle Coding Challenge 1

July 31, 2011 (Forward to the Next Post in the Series) Years ago I played a couple of different games with letters, rather than numbers, on dice – attempting to form words from the letters displayed on top of the dice.  I was not very good with those games, and I recall attempting to create a [...]

The Unique Result Oracle Database Coding Challenge

July 28, 2011 I must say that I am impressed with the number of unique solutions that were developed for the previous coding challenge (FizzBuzz).  While not all solutions were extremely efficient (a couple were intentionally designed to be as inefficient as possible), the various techniques provide views of different approaches to solving a problem [...]

The FizzBuzz Oracle Database Coding Challenge

July 26, 2011 Through a web search I located a page titled “Coding Horror: Why Can’t Programmers.. Program?“  A simple question was asked in an interview, and apparently 199 of 200 programmers struggled to build a solution for the problem in less than ten minutes.  The problem must be that the 199 people who did not succeed [...]

How Many Ways to Solve this Problem? Generate a Calendar that Displays Average Hours Per Day

July 18, 2011 I am surprised at the significant number of unique solutions to the SQL problems that I have previously posed on this blog.  For fun I thought that I would give people another chance to demonstrate their unique approaches to solving another problem. Supposed that a transaction table exists with the following definition: CREATE [...]

How Many Ways to Solve this Problem? Add the Sequential Numbers x Through y

July 13, 2011 I am not entirely sure why, however a couple of days ago the following search keywords were used to access one or more articles on this blog: the sum of 1+2+3+4...+98+99+100 The above request I found to be a bit interesting, and there is a 50/50 chance that the person found the right answer [...]