Oracle SQL | How to use Sub Queries | GoLogica

Oracle SQL- How to use Sub Queries | GoLogica
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Welcome to the GoLogica comprehensive Oracle SQL training series! In this video, we dive deep into the world of subqueries - a powerful tool in SQL that allows you to perform more complex queries by nesting one query inside another. Whether you're a beginner looking to enhance your SQL skills or an experienced developer aiming to fine-tune your query-writing abilities, this tutorial is for you.
What You'll Learn:
🔹 Introduction to Subqueries: Understand what subqueries are and how they can be used to perform advanced data retrieval operations.
🔹 Types of Subqueries: Learn about different types of subqueries, including single-row subqueries, multi-row subqueries, correlated subqueries, and nested subqueries.
🔹 Writing Subqueries: Step-by-step instructions on how to write and implement subqueries in Oracle SQL, complete with practical examples.
🔹 Using Subqueries in SELECT Statements: Explore using subqueries within SELECT statements to filter data, perform calculations, and generate new datasets.
🔹 Subqueries in WHERE and HAVING Clauses: Discover how subqueries can be utilized in WHERE and HAVING clauses to create more specific and powerful filters.
🔹 Performance Considerations: Tips and best practices for optimizing subqueries to ensure efficient query performance.
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