PostgreSQL outshines various other SQL databases with its feature set. Unlike most SQL databases, PostgreSQL offers extensive support for array columns. Using them, we can store collections of values within a single column without creating separate tables. In this article, we explore the capabilities of arrays in PostgreSQL and implement examples using Kysely. Creating the […]
SQL indexes act like guides in our database and help us retrieve the data faster. The bigger our database is, the more emphasis we need to put on its performance. By using indexes, we can help our PostgreSQL database retrieve the data faster. In this article, we learn what indexes are and how to create […]
So far, when working with Kysely, we fetched all rows from our tables. However, this might not be the best solution when it comes to performance. A common approach is to query the data in parts and present the users with separate pages or infinite scrolling. We implement pagination in this article with NestJS, PostgreSQL, […]
When using SQL databases, we can set constraints to ensure our data remains accurate and reliable during insertions, updates, or deletions. In this article, we’ll explore different SQL constraints and demonstrate how to apply them using Kysely and NestJS to maintain data integrity. Check out this repository for the full code from this article. Not-null […]
The integrity of our data should be one of the primary concerns of web developers. Thankfully, SQL databases equip us with tools that we can use to ensure the consistency and accuracy of our data. You can see the complete code from this article in this repository. One of the critical situations to consider is […]
Implementing relationships across tables is a crucial aspect of working with SQL databases. So far, this series covers using Kysely to design simple relationships such as one-to-one and many-to-one. This article looks into many-to-many, which is a slightly more advanced relationship. Check out this repository if you want to see the full code from this […]
Designing relationships is one of the crucial aspects of working with SQL databases. In this article, we continue using Kysely with NestJS and implement many-to-one relationships. Check out this repository if you want to see the full code from this article. Introducing the many-to-one relationship When implementing the many-to-one relationship, a row from the first table […]
When we design the architecture of our database, we usually end up with tables that relate to each other in some way. Managing such relationships is one of the crucial aspects of working with SQL databases. In this article, we explain the one-to-one relationship and handle it using Kysely with PostgreSQL and NestJS. You can […]
Object-Relational Mapping (ORM) libraries such as Prisma and TypeORM can help us produce code faster by avoiding writing SQL queries. They have a smaller learning curve because we don’t need to learn a new language and dive deep into understanding how the database works. Unfortunately, ORM libraries often generate SQL queries that are far from […]
One of the characteristics of relational databases is a strict data structure. We need to specify the shape of every table with its fields, indexes, and relationships. Even if we design our database carefully, the requirements that our application must meet are changing. Because of that, our database needs to evolve as well. When restructuring […]
