May 13, 2025 · 4 min read · LeetCode SQL Optimization: Window Functions vs. Subqueries Developers who frequently use LeetCode are certainly familiar with the problem 185: Department Top Three Salaries, a classic question included in the Top SQL 50. The official provides two ref...
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May 5, 2025 · 3 min read · SQL is a non-negotiable skill for developers, analysts, and engineers in 2025. Whether you're applying for backend roles or data-driven positions, these top SQL questions will sharpen your edge in interviews. ✅ Basics & Core Syntax 1. What is SQL?SQL...
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Jan 31, 2025 · 2 min read · Introduction Data Manipulation Language (DML) in SQL is used to manage data within tables. The three most important DML commands are: INSERT INTO – Adds new records. UPDATE – Modifies existing records. DELETE – Removes records from a table. 1. ...
Join discussionSep 11, 2024 · 2 min read · SQL: SQL (Structured Query Language) plays a crucial role in data management. It's the standard language for interacting with relational databases, a cornerstone of modern computing. Let's get started with the key differences between two fundamental ...
Join discussionSep 9, 2024 · 6 min read · SQL (Structured Query Language) is the standard language used for interacting with relational databases. Whether you are dealing with small-scale databases or enterprise-level systems, query optimization is critical to ensure performance efficiency. ...
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Sep 7, 2024 · 11 min read · Introduction Imagine you're tasked with building or managing a database that needs to grow effortlessly as your business scales, all while keeping your data safe and accessible from anywhere. That’s where Azure SQL Database comes in a powerful platfo...
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Sep 5, 2024 · 9 min read · What is SQL? SQL refers to Structured Query Language to interact with the database. With SQL we can add data, retrieve data, change/ modify data in the data and also we can delete the data in the database. So let's know what is data and database? Dat...
Join discussionMay 8, 2024 · 3 min read · This might ruffle some feathers, but mastering SQL first before learning how to program should be the standard. I learned SQL first before I learned how to program and I have enjoyed working on a SaaS product for almost a decade. In the ever-expandin...
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Apr 21, 2024 · 11 min read · Welcome back to part three of our hospital database series! In the previous installments, we embarked on a journey to translate real-world hospital processes into a structured conceptual model and then transformed it into a relational model. Now, it'...
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Apr 17, 2024 · 40 min read · STRUCTURED QUERY LANGUAGE(SQL) Table of Contents 1 Introduction to SQL 1.1 Data Definition Language (DDL) 1.2 Data Manipulation Language (DML) 2 Introduction to SQL Server 2.1 SQL Server Management Studio 2.1.1 Create a new Database 2.1.2 Queries 3 ...
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