Introduction
Basic CTE
Summary
14. Summary

## Instruction

Excellent. It's time to wrap things up.

• The syntax for CTEs so far is as follows:
WITH cte_name1 (cte1_columns) AS (your_cte1),
cte_name2 (cte2_columns) AS (your_cte2),
...
SELECT ...
• CTEs are placed at the start of the query. They are introduced with WITH.
• You can skip columns definition if you provide aliases to columns containing aggregates and other functions.
• CTEs are temporary sets of rows similar to subqueries. Thanks to them, your query becomes better organized and easier to read.

Alright, then, shall we start with a very short quiz to check how much you remember?

## Exercise

Press to start the quiz.