What are the two required parts of a recursive CTE?

Problem Statement

Explanation

The anchor produces the seed rows. The recursive member references the CTE and expands the result, usually via UNION ALL. A safety condition limits depth. This pattern models hierarchies like org charts and folder trees without procedural code.

Code Solution

SolutionRead Only

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

Practice Sets

This question appears in the following practice sets:

CTEs, Subqueries & Advanced Joins

Next Question

Master Interviews
Anywhere, Anytime

What are the two required parts of a recursive CTE?

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

What are the two required parts of a recursive CTE?

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