RIGHT JOIN
JoinReturns all rows from the right table and matching rows from the left table.
Syntax
SELECT cols FROM t1 RIGHT JOIN t2 ON condition
Example
SELECT o.id, c.name FROM orders o RIGHT JOIN customers c ON o.customer_id = c.id;
About SQL RIGHT JOIN
The RIGHT JOIN keyword belongs to the Join category of SQL statements. Returns all rows from the right table and matching rows from the left table. Understanding this command is essential for any developer working with relational databases like PostgreSQL, MySQL, SQLite, or SQL Server.
SQL (Structured Query Language) is the standard language for managing and querying relational databases. The RIGHT JOIN statement is supported across all major database systems, though specific syntax may vary slightly between PostgreSQL, MySQL, MariaDB, Oracle, SQL Server, and SQLite. Always consult your database's documentation for vendor-specific features and limitations.
Best practices for using RIGHT JOIN: always test queries on a development database before running them in production, use parameterized queries to prevent SQL injection, and leverage EXPLAIN to understand query performance. For complex queries, consider using CTEs (Common Table Expressions) to improve readability and maintainability.