Mostly data; on Oracle, Hadoop, Spark, and whatever I find interesting.

I needed a place where I can publish solutions to problems I’ve met in different areas without worrying about much else.

Invisible Tables

A colleague said that he had some tables that showed up in one tool, but not in another, I think it was Enterprise Manager/Cloud Control. This is easy to forget if you don’t work with non-relational tables regularly. What happens is that only relational tables are listed in DBA_TABLES or USER_TABLES, but all tables can be found if you search DBA_OBJECTS / USER_OBJECTS for objects with OBJECT_TYPE=TABLE. The documentation actually says: USER_TABLES describes the relational tables owned by the current user. [Read More]

You should speak at UKOUG Tech17

Statistically there has to be someone like you, who wants to know about your experience

Have you been in a presentation with the feeling that the speaker is talking over your head? As if he is speaking to a select group, maybe trying to impress them? The selection of words and expressions, subject for the talk may sometimes give a feeling of cleverness, yet you can’t relate to it. Instead you walk away thinking you are not remotely smart enough to give a presentation. That is too bad. [Read More]

Normalizing Data Sets

Importing one-file datasets to your relational database

Here the other day I was helping my son with his homework. His task was to create a simple data model, create it in MySQL, and make a simple web page to access the data. I thought that after creating a few INSERT statements on his own I could help him with demo data. Since he had decided to create a movie database I googled for some movie data sets and decided to use the IMDB 5000. [Read More]

Hi there!

I just got started. With a new blogging platform. I was frustrated with the way things went and wanted to start over with something else, something simple and not pretentious at all. Something that let me spend time on writing the post, and not on formatting the code when I had some SQL to show. Just plain and simple. My previous blog used to be mostly about Oracle, but I spend more and more time looking into Hadoop, Spark and related software. [Read More]