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Introduction
Basic CTE
Summary
14. Summary

## Instruction

Excellent. It's time to wrap things up.

• We've discussed the following CTEs syntax:
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 the WITH keyword.
• You can skip column definitions if you provide aliases to columns that contain aggregates and other functions.
• CTEs are temporary sets of rows. They are similar to subqueries. Thanks to them, your query becomes better organized and easier to read.

Let's do a very short quiz to check how much you remember.

## Exercise

Click to start the quiz.