In a recursive CTE, what are the two essential parts?

Problem Statement

Explanation

The anchor member seeds the first set of rows. The recursive member references the CTE and expands the set until no new rows appear. Always add a termination guard such as a depth limit to avoid infinite recursion.

Code Solution

SolutionRead Only

WITH RECURSIVE org AS (
  SELECT id, manager_id, 1 AS lvl FROM emp WHERE manager_id IS NULL
  UNION ALL
  SELECT e.id, e.manager_id, o.lvl+1 FROM emp e JOIN org o ON e.manager_id=o.id
)
SELECT * FROM org;

Practice Sets

This question appears in the following practice sets:

Subqueries & CTEs (incl. Recursive)

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In a recursive CTE, what are the two essential parts?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

In a recursive CTE, what are the two essential parts?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime