As our database grows, focusing more on its performance is important. SQL indexes act as guides within the database, helping to speed up data retrieval. In this article, we cover how to create indexes using PostgreSQL, Drizzle ORM, and NestJS and explain what indexes are. Why we might need indexes In the previous parts of […]
In SQL, generated columns automatically calculate their values using data from other fields in the same table. This can help ensure data consistency, improve query performance, and simplify our database design in general. The SQL standard contains two types of generated columns. Virtual generated columns With virtual generated columns, we avoid using additional disk storage. […]
Our SQL queries can become more complex as the application we develop grows. To deal with that, PostgreSQL implements views that act as virtual tables with rows and columns from which we can select. Additionally, we can create a cached version of our data using materialized views that store our virtual tables in the database. […]
Storing date and time in a database can be challenging, but it’s important to get it right. In this article, we solve this problem using PostgreSQL and the Drizzle ORM. We also delve into time zones and how to manage them in our database. Managing dates with PostgreSQL We can understand how our database handles […]
Drizzle is a lightweight TypeScript ORM that lets us manage our database schema. Interestingly, it allows us to manage our data through a relational API or an SQL query builder. In this article, we learn how to set up NestJS with Drizzle to implement create, read, update, and delete operations. We also learn how to […]
As a business grows, there is a high chance that it will expand to multiple different countries. The developers must ensure the application is available in different languages to accommodate that. Fortunately, we don’t have to create a separate version of our application in each language. Instead, we can use tools that let us dynamically […]
Web applications are becoming increasingly complex. While that’s the case, we must ensure the interface is intuitive and easy to use. By allowing our users to drag and drop elements across the screen, we can simplify many tasks, such as reordering lists or grouping items. In this article, we learn how to implement the drag-and-drop […]
As our application grows, the amount of data we receive through our REST API grows as well. We often need to split the data into parts and load them separately to avoid performance issues. A common pattern is implementing infinite scrolling that loads more content when the user scrolls down. In this article, we implement […]
Our applications sometimes include features that allow users to select files from their hard drives, and some functionalities might let users download files. Implementing End-to-End tests that ensure that everything works as expected might not seem straightforward at first. In this article, we create a simple React application that lets users choose a JSON file […]
With End-to-End testing (E2E), we test a fully working application where different parts of our application work together in real-life scenarios from start to finish. The End-to-End tests might also act as regression tests that check if our latest changes haven’t broken any previous features. We might also use them as smoke tests that ensure […]
