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

Four Secrets of Success

More than a few people think that I am pretty good at what I do, that I am successful. I respect their judgement and thought about what contributed to my success. I came up with four that form a foundation for (my) success. Since it is possible that others will find them helpful, I have decided to share my Four Secrets of Success (book in the works, film rights sold to Branjolina Films).

SQL Brainteasers: Guess the Mythical Creature

Another batch of SQL brainteasers. This time the clues are to the powers of mythical creatures – the task is to guess the creature!
There’s six in all, can you get them all? Put your answers in the comments!

Simple Android Oracle client

I am happy to announce, that I’ve just published my first android app – Simple oracle client for android!
Since this is only the first version, I’m sure that it contains various UI bugs, so I’ll wait for reviews and bug reports!
Several screenshots:

Querying InnoDB Tables

Somebody ran into the following error message trying to query the innodb_sys_foreign and innodb_sys_foreign_cols tables from the information_schema database:

MySQL Non-unique Index

Somebody wanted to know how to find any non-unique indexes in MySQL. The query takes a session variable with the table name and returns the non-unique indexes by column names. It uses a correlated subquery to exclude the table constraints.

You set the session variable like this:

Popular PHP Frameworks

My students often ask me about popular PHP frameworks and MySQL approaches. I wish a PHP framework choice was as clear as a JavaScript framework, like AngularJS. Unfortunately, PHP frameworks aren’t that clear cut.

VMware 7 Upgrade

VMwareUpgrade7I finally upgraded from VMware Fusion 6 to VMware Fusion 7 to take advantage of the new features.

DATE row generator with DBMS_SCHEDULER

A recent question on the Oracle-L mailing list was about generating dates in a given period. If you had a string like 'MWF', all Mondays, Wednesdays and Fridays between the from- and to-dates should be generated.That reminded me of a quiz on I did on using DBMS_SCHEDULER.EVALUATE_CALENDAR_STRING. I had created a table function to test calendar expressions - that might be useful for something similar to what was asked on the mailing list.

Christmas - A time to give

It's Christmas time... It's a time for giving... It's a time for warm-hearted feelings...But there are people battling for their lives against cancer, who may not have much energy left to enjoy the holidays. Almost everybody has family or friends whose life has been impacted by cancer. Let us all reach out however we can, help wherever we can, and let good thoughts go out to the victims.

Ideas for PL/SQL Championship(s) next year

For most of this year, we have offered two weekly, competitive quizzes on PL/SQL:

PL/SQL Challenge & PL/SQL Explore

But it doesn't really make sense to offer two different championships. At least, that's how I, the fellow who would write all those quizzes, feels about it.

There is, as one might expect, lots of overlap between the top 50 ranked players in the two quizzes: only 14 in PL/SQL Explore are not in PL/SQL Challenge's top 50.

It seems to me that it makes much more sense to have a single championship for PL/SQL, overall.

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