Dec 25, 2025 · 5 min read · Entity Framework Core (EF Core) allows for powerful, complex querying patterns that go far beyond simple Select and Where statements. While LINQ provides a high-level abstraction, understanding how it translates to SQL is critical for performance. He...
Join discussionOct 20, 2025 · 2 min read · Introduction When working with databases, we often need to fetch results that depend on other results. That’s where subqueries come in handy. A subquery is a query written inside another SQL query. You can think of it like this: A subquery is a query...
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Oct 15, 2025 · 5 min read · A subquery, also known as an inner query or nested query, is a SQL query nested inside a larger query. It's a powerful technique for breaking down complex problems into smaller, more manageable parts, allowing you to perform more advanced data retrie...
Join discussionAug 22, 2025 · 4 min read · Retrieval-Augmented Generation (RAG) has become one of the most popular techniques for enhancing LLMs with external knowledge. The idea is simple: retrieve relevant chunks of data from a knowledge base and feed them into the LLM along with the user’s...
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Jul 4, 2025 · 4 min read · Today marked a significant step forward in my structured SQL learning journey. Building on foundational concepts, I focused on writing queries that simulate real-world use cases: slicing data, computing business metrics, and summarizing information e...
Join discussionApr 3, 2025 · 10 min read · Nói một cách đơn giản, Subquery là một câu truy vấn SQL được đặt bên trong một câu truy vấn SQL khác (thường gọi là truy vấn cha hoặc truy vấn ngoài). Kết quả của Subquery sẽ được sử dụng bởi truy vấn cha để hoàn thành nhiệm vụ của nó như: lọc dữ liệ...
Join discussionOct 19, 2024 · 3 min read · In todays article I’m going to be talking about advanced querying in SQL. I’m going to be using the same database schema we created in our previous article which you can find here - https://themathlab.hashnode.dev/mysql-fundamentals-learn-the-basics ...
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Sep 27, 2024 · 2 min read · A subquery is a query nested within another query to provide intermediate results for the main query. Subqueries can appear in the: SELECT clause: To compute derived columns. FROM clause: To use as a temporary table or result set. WHERE clause: To...
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Sep 9, 2024 · 1 min read · Subqueries are a critical feature in MySQL, allowing for more complex and dynamic querying. This guide offers a quick overview of how they work and when to use them. A common use of subqueries is to filter data in a SELECT statement. For instance: SE...
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Aug 23, 2024 · 3 min read · We’re excited to announce that Traceye now offers dedicated SubQuery nodes, providing seamless and efficient data indexing across multiple blockchain ecosystems. SubQuery, originally designed for indexing Parachains and later expanded to support EVM ...
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