A seasoned software engineer with extensive experience in building complex distributed data-intensive backend services. The most general way to satisfy a COUNT DISTINCT or SELECT DISTINCT clause is to ...

MySQL is one of the world’s most widely used database management systems. It is easy to install and use and is usually free. Here’s how to use it. In our previous post, we took you through the basic ...

CREATE TABLE branch ( branch_id INT PRIMARY KEY, branch_name VARCHAR (40), FOREIGN KEY (mgr_id) REFERENCES employee (emp_id) ON DELETE SET NULL ); --Adicionando foreign key na tabela employee ALTER ...

Databases systems have come a long way from their origins. Stemming from the original relational database system in the 70s, we’ve seen a lot of big jumps in terms of what they can do and how ...

Hello Pythonistas welcome back. Today we will continue with the third project in our series CodeCraft: Building Skills One Project at a Time. So let’s get started, the third project in this series is ...