Recursive CTE For Hierarchical Data Structures Explained
Recursive CTEs allow hierarchical data retrieval. They consist of an anchor member & a recursive member. Example: Find employee hierarchy using `WITH RECURSIVE EmployeeHierarchy AS (...) SELECT * FROM EmployeeHierarchy;
Recursive Common Table Expression CTE A Recursive Common Table Expression (CTE) is a CTE that references itself. It allows you to perform recursive queries, often used for hierarchical or tree-like data structures (e.g., organizational charts, folder structures, or graphs). A recursive CTE consists of two parts: 1. Anchor member: The base query that initializes the recursion. 2. Recursive member: A query that references the CTE itself to continue building the result set. Example: Find a Hierarchy (e.g., Employee Management Tree) Assume you have an employees table: The goal is to re...