The purpose of this repository is to serve as a practical study guide for SQL learners and a cheat sheet for future use. The Database Management System of choice was PostgreSQL due to its open-source ...

PL/SQL stands for Procedural Language extension of SQL. PL/SQL is a combination of SQL along with the procedural features of programming languages. It was developed by Oracle Corporation in the early ...

This tutorial explains how to use a script to load sample data into a [!INCLUDEbig-data-clusters-2019]. Many of the other tutorials in the documentation use this sample data. The following steps use a ...

Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...

The SQL Developer unit testing framework involves a set of sequential steps for each test case. The steps are as follows, including the user input for before the step is run and the framework ...

Even if generative AI hides SQL behind the curtain, it will continue to play a critical role in how we interact with and use data. In May 1974, Donald Chamberlin and Raymond Boyce published a paper on ...