CREATE TABLE classes ( class_id SERIAL PRIMARY KEY, class_name VARCHAR(50) NOT NULL ); CREATE TABLE students ( student_id SERIAL PRIMARY KEY, student_name VARCHAR(100 ...

This document outlines performance on using NOT IN versus NOT EXISTS clauses, where the compared field is NULLABLE or not NULLABLE. If your fields are not nullable, it does not make a difference. If ...

This document outlines a performance benchmark on selecting all values from a larger table, joined by a smaller table, where no joined values exists. In other words, an inverted INNER JOIN clause. It ...