Скачать или смотреть How Do I Use The DISTINCT Keyword In SQL? - Server Logic Simplified

How Do I Use The DISTINCT Keyword In SQL? Are you looking to filter out duplicate data in your SQL queries and obtain only the unique entries? In this comprehensive video, we'll explain everything you need to know about using the DISTINCT keyword in SQL. We'll start by showing how to select unique values from a single column, making it easier to identify different categories or locations in your database. You'll learn how to combine multiple columns to find distinct pairs or combinations, which is useful for analyzing relationships within your data. We’ll also cover how behind-the-scenes processing works when applying DISTINCT, helping you understand what happens after your query runs. Additionally, we'll discuss practical scenarios where DISTINCT can be used, such as preparing data for reports, populating dropdown menus, or counting unique entries with aggregate functions like COUNT. You'll discover tips on when to use DISTINCT to optimize your queries, especially with large datasets, and how it can help keep your data clean and organized. Whether you're building backend features or managing data for applications, understanding how to effectively utilize DISTINCT will make your data handling more efficient and straightforward. Join us for this detailed explanation and subscribe to our channel for more tutorials on backend development and database management.

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