SQL Server · question
Question 4 of 35
Explain different types of JOIN operations.
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Re-explain
- INNER JOIN: Returns records matching in both tables
- LEFT JOIN: Returns all records from left table and matching from right
- RIGHT JOIN: Returns all records from right table and matching from left
- FULL OUTER JOIN: Returns all records from both tables
- CROSS JOIN: Returns Cartesian product of both tables
Example:
-- INNER JOIN
SELECT e.Name, d.DepartmentName
FROM Employees e
INNER JOIN Departments d ON e.DeptID = d.ID;
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