Master SQL for Data Analysis - What Is Subquery?

The video tutorial explains subqueries in SQL, which are queries nested within other queries. It covers the syntax, practical use cases, and types of subqueries, including single row, multiple rows, and table-like outputs. The tutorial also discusses where subqueries can be used in SQL statements like SELECT, UPDATE, DELETE, and INSERT. It emphasizes the importance of understanding the result set type returned by a subquery, as it affects how the data can be used in the main query. Practical examples are provided to illustrate these concepts.

What are the practical considerations when nesting subqueries?

Why is the type of result set returned by a subquery important?