Recursive Queries

Overview

Recursive queries iterate over relational networks, graphs, and deep trees using recursive CTE execution patterns.

Code Examples

SQL

WITH RECURSIVE Nodes AS (
    SELECT id, parent_id FROM graph WHERE parent_id IS NULL
    UNION ALL
    SELECT g.id, g.parent_id FROM graph g JOIN Nodes n ON g.parent_id = n.id
)
SELECT * FROM Nodes;

Summary

Recursive queries traverse non-linear tree and graph structures in SQL.