Video : AVG, MEDIAN, MIN and MAX : Problem Solving using Analytic Functions

In today’s video we take a quick look at the AVG, MEDIAN, MIN and MAX aggregate and analytic functions.

You can get more information on these and more analytic functions here.

The star of today’s video is Sten Vesterli, in one of the rare moments at OpenWorld when he’s not in a wetsuit. 🙂

Cheers

Tim…

Video : FIRST_VALUE and LAST_VALUE : Problem Solving using Analytic Functions

Today’s video is a quick run through the FIRST_VALUE and LAST_VALUE analytic functions.

You can find more information about these and other analytic functions in the following articles.

The star of today’s video is Lonneke Dikmans. She probably won’t believe me, but I probably quote/paraphrase her advice more often than any other person in the Oracle space.

Cheers

Tim…

Video : LAG and LEAD : Problem Solving using Analytic Functions

Today’s video gives a quick demo of the LAG and LEAD analytic functions.

There is more information about these and other analytic functions in the following articles.

The star of today’s video is Gwen (Chen) Shapira of Kafka fame!

Cheers

Tim…

Video : JSON_SERIALIZE Function in Oracle Database 19c Onward

Today’s video is a brief run through the JSON_SERIALIZE function, introduced in Oracle 19c. If you have used any of the other SQL/JSON functions, it’s going to feel pretty familiar.

For those people that prefer there information in written form, you can read about this function here.

The star of this video is Zahid Anwar, or ZedDBA. 🙂

Cheers

Tim…

Video : SQL/JSON : Generate JSON from SQL

Today’s video is a quick run through some of the SQL/JSON functionality introduced in Oracle database 12.2.

For those people that want a lot more information, including copy/paste examples, check out the article it’s based upon, and all the other JSON stuff I’ve written here.

The star of today’s video is Roel Hartman of APEX fame!

Cheers

Tim…

Real Talk : PL/SQL and SQL as your only development skill

notes-514998_640This morning I was asked a question about the job opportunities for a PL/SQL developer these days. I’m talking about someone with good SQL and PL/SQL skills, but limited, or no, knowledge of other development languages.

I think most people know I’m a big fan of PL/SQL. If you have good SQL skills and you know PL/SQL well, you can do pretty much anything with an Oracle database, including all types of web service and web development. Throw in some APEX skills and you can be super productive as a web developer against Oracle databases.

So back to the question, what are the job opportunities for a PL/SQL developer? In the UK at least, that’s not a great place to be right now. When I first started with Oracle technology it was not uncommon for companies to employ developers just to code PL/SQL. There are still jobs like that available, my employer has two PL/SQL contractors right now, but the market for a programmer with just PL/SQL is on the decline. Search for “programming language popularity” and you will see a number of indexes don’t include SQL and PL/SQL in the top 20 lists. Search for “enterprise programming language popularity” and you will see SQL and PL/SQL appear. There may be flaws in the way the information for these lists is gathered, but you get the message.

That’s not to say SQL and PL/SQL skills are not of value, just that those skills alone are no longer enough. They have to be part of a package that includes other development skills.

Most people I talk to work in organisations that use multiple database engines (Oracle, SQL Server, MySQL, several NoSQL engines), so having a person that can only do PL/SQL development means they are of limited use compared to someone that also knows Java, C# or Javascript to a high level. That is, development skills that span database engines.

In a similar way, my current employer won’t commit to APEX as a strategic development platform because it is just for Oracle databases. Using database links to other engines to allow you to continue using APEX against them is not strategic. 🙂 In the same way, we have a lot of PL/SQL right now, but in the future I can see this being of less importance compared to other skills that are multi-engine. Do I like this situation? No, but it seems to be where we are right now.

Of course, this could be a conversation about “Java/C#/Javascript as your only development skill”. Development in todays world requires multiple languages, each serving a different purpose. It could also be a database engine discussion. I can’t imagine ever working for a company again that doesn’t expect me to look after MySQL, SQL Server and other engines, as well as Oracle.

I hope this doesn’t come off as negative. I love SQL and PL/SQL and I would love to be able to tell you these skills alone would set you up for life, but that would be a lie. As a developer, you are forced to follow the market and the market says you need multiple development skills to survive. I hope you pick SQL and PL/SQL as part of your skill set, as they are still very important in enterprise companies, but in the current climate betting your whole development career on a single language is not a safe bet. 🙂

Cheers

Tim…

PS. Us old folks will cling on until the bitter end. 🙂

Video : CASE Expressions and CASE Statements

Today’s video is about CASE expressions and CASE statements.

The guest in today’s video is Scott Wesley, who is currently plugging his new book called Pro jQuery in Oracle Application Express. He will no doubt use the vast quantities of money he makes from the books sales to throw outlandishly extravagant barbecues, because that’s all they do down under. 🙂

Cheers

Tim…

Video : Flashback Version Query

Today’s video gives a quick run through of flashback version query.

If you prefer to read articles, rather than watch videos, you might be interested in these.

The star of today’s video is Tanel Poder. I was filming some other people, he saw something was going on, came across and struck a pose. I figured he knew what I was doing, but it’s pretty obvious from the outtake at the end of the video he was blissfully unaware, but wanted in on the action whatever it was! A true star! 🙂

Cheers

Tim…

Video : SQL/XML (SQLX) : Generating XML using SQL in Oracle

Another video fresh off the press.

If videos aren’t your thing, you can always read the article the video is based on.

The star of this video is Kevin Closson. Kevin’s a really nice guy and has a brain the size of a planet, but you know somewhere in the back of his mind he’s wondering what it would be like to hunt you down, kill you and mount your head above his fireplace. 🙂

Cheers

Tim…