# Chapter 7. Queries
Table of Contents
7.2.3. The GROUP BY
and HAVING
Clauses
7.2.4. GROUPING SETS
, CUBE
, and ROLLUP
7.2.5. Window Function Processing
7.4. Combining Queries (UNION
, INTERSECT
, EXCEPT
)
7.8. WITH
Queries (Common Table Expressions)
7.8.3. Common Table Expression Materialization
7.8.4. Data-Modifying Statements in WITH
The previous chapters explained how to create tables, how to fill them with data, and how to manipulate that data. Now we finally discuss how to retrieve the data from the database.