Self Join MySQL | MySQL full course | Full tutorial for beginners | #revildo_code

Self Join MySQL | MySQL full course | Full tutorial for beginners | #revildo_code

SELF JOIN is a join that is used to join a table with itself. In the previous sections, we have learned about the joining of the table with the other tables using different JOINS, such as INNER, LEFT, RIGHT, and CROSS JOIN. However, there is a need to combine data with other data in the same table itself.

In MySQL, Self-Join is important to query ordered data by comparing rows in the same table. The SQL query for Self-Join is applied in a table to itself showing as if there are two tables where using temporary names as alias for the same table in SQL statement.

self join is a join in which a table is joined with itself (which is also called Unary relationships), especially when the table has a FOREIGN KEY which references its own PRIMARY KEY. To join a table itself means that each row of the table is combined with itself and with every other row of the table

self-join is a join that can be used to join a table with itself. Hence, it is a unary relation. In a self-join, each row of the table is joined with itself and all the other rows of the same table. Thus, a self-join is mainly used to combine and compare the rows of the same table in the database.

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