The IN operator is used to check multiple values.
When a subquery returns more than one result, IN is used to match those values.
This makes filtering flexible and powerful.
IN works with a list of values.
A subquery can generate this list dynamically.
The outer query compares against these values.
Subqueries with IN are commonly used to match records across related tables.
This is useful when multiple values are returned.
The outer query checks whether values exist inside the result of the subquery.
This helps match multiple records.
IN subqueries are commonly used in reports and multi-table filtering.
They are easier to read than complex joins in some cases.
Understanding IN improves SQL logic skills.