Subquery in SQL–Scalar, Correlated, Multi-row, and More! | When to Use What? | @codewithabby |2025

Subquery in SQL–Scalar, Correlated, Multi-row, and More! | When to Use What? | ⁨@codewithabby | 2025

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Hello Everyone !
Welcome to the channel Code With Abby. CodeWithAbby is the one stop solution for all your technical needs. I (at Code With Abby) am from INDIA and make videos of different technical topics. These videos are made based on my research and industry experience of more than 20 years.
In this video , I am going to talk, discuss and demo about an important concept in SQL Server i.e.subqueries. What , Why , where and real-time examples with practical demo in SQL server Management Studio.

At the end of this episode you would be able to understand subqueries in depth. You would be able to use this in your practical projects.

Regards,
Abby
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00:00 - Introduction
01:07 - Defining subqueries in SQL Server
01:56 - Subqueries practical example in SQL Server Management Studio
06:38 - First Real-time example of subquery
11:00 - Second Real-time example of subquery
15:05 - Third Real-time example of subquery
17:12 - Types of Subqueries
18:42 - Scalar Subqueries
19:13 - Multi-Row Subqueries
19:37 - Multi-Column Subqueries
22:15 - Subqueries in SELECT clause
26:04 - Subqueries in WHERE Clause
26:39 - Subqueries in FROM Clause
28:52 - Subqueries in HAVING Clause
29:53 - Non-Correlated & Correlated Subqueries
30:58 - Subqueries Vs. Join
31:54 - When to use subqueries?
32:29 - When to use join?
Play List (Mastering SQL Queries and T SQL)
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Видео Subquery in SQL–Scalar, Correlated, Multi-row, and More! | When to Use What? | @codewithabby |2025 канала CodeWithAbby