SQL Joins

SQL joins are methods to combine data from two or more tables based on related columns. Think of tables as spreadsheets; a join merges relevant rows to give a complete view. For example, an "inner join" shows only matches found in both tables, while a "left join" includes all rows from the first table and matching rows from the second. Joins help organize complex data, making relationships clear—like linking customer info with their orders or products to categories—enabling efficient analysis and reporting.