SQL JOINS

WHAT IS JOINS :
To combine data from two or more tables based on a related column.

• Retrieving connected data stored across multiple tables.
• Matching records using common columns.
• Improving data analysis by combining related information.
• Creating meaningful result sets from separate tables.

TYPES OF JOINS :

1. INNER JOIN.
2. LEFT JOIN.
3. RIGHT JOIN.
4. FULL JOIN.
5. Natural Join.

INNER JOIN :

To retrieve rows where matching values exist in both tables. It helps in:

• Combining records based on a related column.
• Returning only matching rows from both tables.
• Excluding non-matching data from the result set.
• Ensuring accurate data relationships between tables.