What is the difference between LATERAL JOIN and a subquery in PostgreSQL?
What is a LATERAL join? The feature was introduced with PostgreSQL 9.3. The manual: Subqueries appearing in FROM can be preceded by the key word LATERAL. This allows them to reference columns provided by preceding FROM items. (Without LATERAL, each subquery is evaluated independently and so cannot cross-reference any other FROM item.) Table functions appearing in FROM can also be preceded by the key word LATERAL, but for functions the key … Read more