Web development is a constantly evolving field, and it’s crucial for beginner developers to know where to start in order to acquire the skills that are in demand in the job market. In this blog, we will provide a roadmap to guide you on your journey to becoming a web developer in 2022. The Three Paths in Web Development There are three main paths in web development that you can choose from:...
When working with a PostgreSQL database, you may need to define a primary key column that auto-increments its value for each new record. This can be achieved by using the SERIAL type combined with the PRIMARY KEY constraint. The following steps outline how to accomplish this: Start by creating a new table, for example, let’s call it cars. Specify the columns you want in your table definition, including the primary key column....
Learn how to install the PostgreSQL Database Management System (DBMS) on macOS using the following instructions. If you’re using Windows or Linux, visit https://www.postgresql.org/download/ to choose your package. You can also search for instructions specific to your platform, such as “how to install postgres on Windows” or “how to install postgres on [your Linux distribution].” The installation process is similar across platforms, especially after the initial installation phase. On macOS, we will use Homebrew....
When working with PostgreSQL, there are two ways to list all databases: using the psql tool or by executing an SQL query. Listing databases using psql To list all databases using psql, follow these steps: Open the psql tool. Type the command \list or \l and hit Enter. PostgreSQL will display a list of databases and templates. Here is an example of the database list: airbnbclone nextbnb postgres test In addition to databases, PostgreSQL also includes templates....
In PostgreSQL, there are multiple ways to list tables in the current database. In this article, we will explore two methods: using the psql tool and running an SQL query. Method 1: Using psql To list the tables in the current database using the psql tool, follow these steps: Open the psql tool in your terminal or command prompt. Connect to your PostgreSQL database by running the following command: psql -U username -d database_name Replace username with your PostgreSQL username and database_name with the name of your database....
In PostgreSQL, it is not uncommon to encounter an error message stating “relation does not exist” when attempting to execute a query on a table. This article aims to provide a quick explanation of why this error occurs and how to resolve it. Let’s say you have a PostgreSQL database with a table named “Car.” When you run the following query: SELECT * FROM Car; You may encounter the following error message:...
Authentication is a crucial aspect of any web application, including those built with Next.js. There are several ways to manage authentication in Next.js, and in this blog post, I will explain how to implement email-based authentication with JWT tokens using NextAuth. To begin with, you will need to set up an external database. You can choose a local database or a cloud-based one. In my case, I opted for PostgreSQL, but you can use any database that you prefer....
PostgreSQL, also known as Postgres, is a highly popular and robust SQL database management system (DBMS). Developed as an open-source software, it has gained immense popularity since its inception in 1996, building upon the foundation laid by earlier software in the 1980s. As a comprehensive and feature-rich general-purpose relational database, PostgreSQL offers extensive support for the SQL standard. Moreover, it incorporates an array of unique features that make it an exceptional tool for database management....
SQL (Structured Query Language) is a powerful language used to interact with Database Management Systems (DBMS). It is specifically designed for querying and manipulating data in relational databases. In this blog post, we will explore the fundamental concepts of SQL and gain insights into its evolution and implementations. The Evolution of SQL First published in 1986, SQL has undergone several updates and revisions over the years. The latest version, as of writing this blog, is SQL 2019....
In this tutorial, I will explain how to manage users and permissions in PostgreSQL in an efficient and organized manner. PostgreSQL revolves around the concept of roles, which are used to define user permissions. When you first install PostgreSQL on macOS, a role is automatically created based on your macOS username, along with a list of permissions granted. It is important to note that in PostgreSQL, there are no users, only roles....