Nov 27, 2025 · 5 min read · Data Integrity ensures that the data in your database is accurate, consistent, and adheres to business rules. Constraints are the database objects that enforce these rules at the lowest level, preventing invalid data entry regardless of the applicati...
Join discussionOct 28, 2025 · 6 min read · We coded the domain layer classes in the earlier chapter. Now we need to write the classes of data layer so that the use case becomes more meaningful in nature. The GetArtUseCase will fetch the list of Art objects from the local Room database. This i...
Join discussionAug 14, 2025 · 8 min read · Imagine you’re sitting in an interview. The interviewer looks at you and asks,"What is data?" You might be tempted to say something like, “Data is anything that exists on Earth… numbers, letters, symbols, all of that right?” Then they hit you with th...
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Jul 15, 2025 · 3 min read · In relational database design, understanding how tables relate to each other is critical. Whether you're building a social media platform, e-commerce system, or blog site, you’ll encounter different types of relationships. In this article, I’ll walk ...
Join discussionMay 11, 2025 · 1 min read · Problem While inserting data into a PostgreSQL table, I got this error: ERROR: Key (“userId“)=(1234) already exists.duplicate key value violates unique constraint “User_pkey“ SQL state: 23505 Details: Key (“userId“)=(1234) already exists. The userId...
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Apr 5, 2025 · 4 min read · In a database design design we are discuss these three important topics - Tables, Entities and RDBMS. You may ask why ? Aren’t you digressing from the topic ? I would like to say that we would be using these concepts as the building blocks of our des...
Join discussionApr 5, 2025 · 3 min read · In today’s modern digital world dominated by Artificial Intelligence and Machine Learning, data is the new fuel. Data is at the core of every application - from fitness apps, healthcare and e-commerce to banking and social media. We use databases to ...
Join discussionApr 5, 2025 · 4 min read · What is SQL ? SQL (Structured Query Language) is the standard language used to create, read, update, and delete data in a relational database. Why is SQL important ? It allows us to communicate with the database and manage data effectively. Types of ...
Join discussionSep 23, 2024 · 7 min read · Introduction If you've found yourself asking the same age-old question: “Should I use UUIDs or auto-incrementing integers for my primary keys?”—congratulations! You're officially one of us, a developer with existential dilemmas. It’s like choosing be...
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Jun 5, 2024 · 2 min read · Trabalhando com edição de dados no banco utilizando o .NET, encontrei a dificuldade de puxar as keys do banco de dados para o código no Visual Studio. A primeira solução que pensei para isso foi criar uma textBox que serviria como um placeholder que ...
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