What is the difference between INNER JOIN, LEFT JOIN and RIGHT JOIN in SQL?

In SQL joins, "left" and "right" tables are determined by their order in the JOIN clause. The left table is listed first, the right table second. LEFT JOIN returns all rows from the left table and matching rows from the right, filling unmatched rows with NULLs on the right. Conversely, RIGHT JOIN returns all rows from the right table and matching rows from the left, using NULLs for unmatched left-side rows. INNER JOIN only returns rows with matches in both tables. The choice between LEFT and RIGHT JOIN is based on which table's complete data is prioritized. Switching table order and join type can yield equivalent results. LEFT JOIN is more frequently used. The core function of JOINs is combining data from multiple tables based on shared columns. Understanding these join types is crucial for effective SQL database management.