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What is Full Join in SQL?

Under SQL joins, Full Join is a keyword, which is used to select all records from the right table and also from the left table

 

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Full Join in SQL

The Full Join basically returns all records from the left table and also from the right table. For example, let’s say, we have two tables, Table A and Table B. When Full Join is applied on these two tables, it returns us all records from both Table A and Table B. If the condition is not met, then the null value is displayed instead.
A Brief Introduction to Full Join

Syntax

SELECT columns
FROM table1 name
FULL JOIN table2 name
ON table1.coumn_x = table2.column_y;

where SELECT, FULL JOIN, and ON are the keywords, columns are the list of columns, table1 is the first table, table2 is the second table, and column_x and column_y are the columns for performing Left Join, followed by a semicolon.

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Example

Let’s apply Full Join to two tables, the employee table, and the department table

Select employee.e_name, employee.e_dept, department.d_name, department.d_location from employee
FULL JOIN department
ON employee.e_dept = department.d_name;

Syntax

 

After writing the query, click on the execute button to check for errors. Once the query is executed, a message appears like ‘Commands completed successfully.
This brings us to the end of this tutorial section on JOIN operators.

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