SQL SUBQUERIES
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A subquery is a query that resides within another query. These nested queries allow you to perform complex data retrieval and manipulation in a single command. Subqueries are particularly useful when dealing with multiple tables or when you need to filter data based on results from another query.
Cons:
Performance Overhead:
Subqueries can be less efficient than other query techniques, especially when dealing with large datasets.
Some subqueries may require scanning the entire table or performing additional operations, impacting performance.
Readability:
Subqueries can make queries harder to read and understand, especially when nested deeply.
Complex subqueries may confuse developers and maintainers, leading to maintenance challenges.
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