Step 1: Understand what SQL joins are. SQL joins are used to combine data from two or more tables in a database.
Step 2: Learn about the different types of SQL joins. The main types are INNER JOIN, OUTER JOIN, and CROSS JOIN.
Step 3: Recognize that INNER JOIN combines rows that have matching values in both tables.
Step 4: Understand that OUTER JOIN includes all rows from one table and the matching rows from the other table, filling in with NULLs where there are no matches.
Step 5: Know that CROSS JOIN produces a Cartesian product, combining every row from the first table with every row from the second table.
