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AlmaLinux Install & Configuration
This is a collection of blog posts for installing and configuring AlmaLinux with the Oracle, PostgreSQL, MySQL databases and several programming languages. Sample programs show how to connect PHP and...
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TDE on PostgreSQL
The scope of Transparent Data Encryption (TDE) in PostgreSQL only applies to columns. It does not encrypt other aspects of the database, like table-level and database-level encryption; and those who...
View ArticleGROUP BY Quirk
It’s always interesting to see how others teach SQL courses. It can be revealing as to whether they understand SQL or only understand a dialect of SQL. In this case, one of my old students was taking a...
View ArticlePostgreSQL Java
The majority of information to write this post comes form knowing how Java works and where to find the PostgreSQL JDBC Java archive (.jar) file and the standard documentation. Here are the URLs:...
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SQL Developer & PostgreSQL
I had a request from one of the adjunct professors to connect SQL Developer to the PostgreSQL database. This is in support of our database programming class that teaches students how to write PL/SQL...
View ArticlePL/pgSQL Test Q?
Intriguing little PostgreSQL PL/pgSQL test question posed by an interviewer of one of my students. Basically, how many times will this loop and what will it return or will it generate an error. (BTW,...
View ArticlePostgreSQL User Password
Miraculous events happen on my students’ computers almost weekly. For example, one couldn’t remember their student user’s password, which I set by default. How did they change it? They don’t recall....
View ArticlePython3 on PostgreSQL
The necessary Python 3 driver for connections to the PostgreSQL database is python3-psycopg2, as qualified by this earlier post with full test examples for Red Hat distributions. You can install it on...
View ArticleRuby+PostgreSQL on Ubuntu
This extends the earlier post on installing and configuring Ruby 3.3.0 on Ubuntu 22.0.4. Please refer to that earlier post to install Ruby. This post shows you how to install the necessary libraries...
View ArticleAdd PostGIS to PostgreSQL
The following blog post shows you how to add PostGIS and PgRouting to your existing install of PostgeSQL 14 on the Ubuntu Desktop, Version 22.0.4. This blog post relies on information in this earlier...
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