When should you use RIGHT JOIN?

In SQL, a RIGHT JOIN is used to return all records from the right table (the table listed second in the JOIN) and the matched records from the left table (the table listed first in the JOIN). If there is no match, the result is NULL from the left table. RIGHT JOIN is particularly useful in scenarios where you want to retrieve data from the right table regardless of whether there are corresponding records in the left table.

When to Use RIGHT JOIN

  • When you want to include all entries from the right table regardless of whether there are matches in the left table.
  • When the right table is the primary entity and missing values from the left table should not exclude these primary entries.
  • In cases where the relationship between tables focuses on the right table more prominently.

Example

SELECT employees.name, departments.department_name FROM employees RIGHT JOIN departments ON employees.department_id = departments.id;

RIGHT JOIN SQL JOIN DATABASE SQL QUERY RELATIONAL DATABASE

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