Joining Strategies: Comprehensive Insight into SQL Join Types

Photo by Sunder Muthukumaran on Unsplash

In SQL, joins are used to combine rows from two or more tables based on a related column between them. There are several types of joins, each serving a different purpose. Here are the main types of SQL joins:

1. INNER JOIN:

• Returns only the rows that have matching values in both tables.
• Syntax:

SELECT * FROM table1
INNER JOIN table2 ON table1.column_name = table2.column_name;

2. LEFT (OUTER) JOIN:

• Returns all rows from the left table and the matched rows from the right table. If there is no match, NULL values are returned for columns from the right table.
• Syntax:

SELECT * FROM table1
LEFT JOIN table2 ON table1.column_name = table2.column_name;

3. RIGHT (OUTER) JOIN:

• Returns all rows from the right table and the matched rows from the left table. If there is no match, NULL values are returned for columns from the left table.
• Syntax:

SELECT * FROM table1
RIGHT JOIN table2 ON table1.column_name = table2.column_name;

4. FULL (OUTER) JOIN:

• Returns all rows when there…