SQL Server: Self Join

Level : Beginner
Mentor: Shailendra Chauhan
Type : GuidedLab
Points : 10
Duration : 00:25:00

Lab Details


In SQL Server, A Self Join is a join where a table is joined with itself. It's often used to compare rows within the same table, typically when dealing with hierarchical or recursive data structures.

In this lab, you will learn how to use Self Joins in SQL Server.

Based on this Schema, generate the solutions to the respective queries listed below:

  • Match suppliers that are from the same country.
  • Match customers that are from the same city and country.
  • Find customers with the same first name (i.e. duplicates).

Lab Objective

Upon completion of this lab, you will be able to:

  • Gain Hands-On Experience on SQL Server Self Joins


  • You should have conceptual understanding of Joins.
  • You must have SQL Server Installed on your systems.

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