Equijoins are also commonly known as simple joins, or inner joins. Given two or more tables, an equijoin will return the results of these tables where a common column between any given pair of tables has the same value (an equal value). Equijoins are typically joins between foreign keys in one table to a primary key in another table.
A join between two tables where rows are returned if one or more columns in common between the two tables are equal and not NULL.
5.2.1. Pre-Oracle9i Equijoin Syntax
The boss, King, gets his employee report with only the department ID on it, because the query used for the report is based on only the EMPLOYEES table. When the company was smaller, he knew automatically that department 100 ...