Hey, folks! In this article, we will be focusing on SQL Self Join in detail. As we have already seen in our series of  SQL Join tutorial, Joins enables us to associate information from different record tables in accordance with the condition.

• Now, in this post, we will unveil the working of Self Join in detail.

What is Self Join in SQL?

SQL Self Join enables the administrator to join the single table with itself. That is, it connects and associates the data records with itself.

Thus, a Self Join maintains a Unary relationship between itself. Here, every record(row) of the table is combined and associated with itself and with every other record of the table.

Self Joins are useful when we come across situations wherein the data with the same table needs to be compared.

Moreover, it is useful to model the hierarchies within the single table of the database. Now, let us focus on the structure of Self Join in the upcoming section.

#sql #sql self join