Topic 11418 min readStructured Tutorial
SQL Server SELF JOIN Tutorial
Quick Answer
A SELF JOIN in SQL Server is a join where a table is joined to itself to compare rows within the same table. It is useful for querying hierarchical data or finding relationships between rows in the same table.
Learning Objectives
- Understand what a SELF JOIN is and when to use it in SQL Server.
- Write SQL queries using SELF JOIN to find relationships within the same table.
- Apply SELF JOIN to solve hierarchical data problems.
Introduction
In SQL Server, a SELF JOIN is a powerful technique where a table is joined to itself.
This allows you to compare rows within the same table, which is useful for hierarchical data or finding related records.
A table can join to itself to reveal relationships within its own data.
