Joins are faster than subqueries in most cases. Always filter data before joining, and avoid joining large datasets without indexes.
- Use indexed columns in JOIN ON conditions.
- Avoid joining on computed values or different data types.
Sample Users Table Data :-

General Syntax:-
SELECT table1.column1, table2.column2
FROM table1
JOIN table2 ON table1.common_column = table2.common_column
WHERE table2.filter_column = ‘value’;
Example:-:
SELECT o.id, c.name
FROM orders o
JOIN customers c ON o.customer_id = c.id
WHERE c.city = ‘Mumbai’;
Output:-
