Advanced SQL queries extend the capabilities of basic SQL by allowing for more complex data retrieval and manipulation. They build upon fundamental concepts like SELECT statements, WHERE clauses, and JOINs, but introduce techniques that enable sophisticated data analysis. One key element is the use of subqueries, which allow you to embed one query within another. This enables you to filter data based on results from a separate query. Another powerful technique is using window functions, which allow you to perform calculations across a set of rows related to the current row, without grouping. These functions are invaluable for tasks like calculating running totals or ranking data. Finally, advanced queries often involve complex joins, combining data from multiple tables in intricate ways. Mastering these techniques is essential for extracting meaningful insights from large and complex datasets.