1. IT COMBINES BOTH THE TABLES. 2. NOTE -> SELECT FIELDS SHOULD BE SAME NO OF COLUMNS THEN ONLY IT RUNS OTHERWISE IT THROWS ERROR. 3. ONLY DIFF BETWEEN UNION AND UNION ALL IS UNION ELIMINATE THE ...

This tutorial explains the usage of SQL JOINS and UNIONS for combining data from multiple tables in a relational database. The LEFT JOIN returns all rows from the left table and the matched rows from ...