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SQL Joins, SQL Inner Join, SQL Left Join, SQL Right Join, SQL Full Join

SQL TUTORIALS-

SQL Joins

Introduction-

-✅Simple Joins are used in SQL to combine rows from two or more tables based on a related column...

Emoji Examples in HTML

Join Type	Description
INNER JOIN	Please Note- Returns only matching rows from both tables.
LEFT JOIN	Please Note- Returns all rows from the left table and matching rows from the right.
RIGHT JOIN	Please Note- Returns all rows from the right table and matching rows from the left.
FULL OUTER JOIN	Please Note- Returns all rows when there is a match in one of the tables.
CROSS JOIN	Please Note- Returns cartesian product (every row of table A with every row of table B).

💡 Note: The SQL JOINS Table. Example Of Two Tables- 1-)Employee and 2-)Department.

Emoji Examples in HTML

Emoji Examples in HTML



SELECT Employee.EmpName, Department.DeptName
FROM Employee
INNER JOIN Department ON Employee.DeptID = Department.DeptID;

✅Result Show :-

Result →

Emoji Examples in HTML



SELECT Employee.EmpName, Department.DeptName
FROM Employee
LEFT JOIN Department ON Employee.DeptID = Department.DeptID;

✅Result Show :-

Result →

Emoji Examples in HTML

💡 Note: The SQL JOINS is used in SQL to combine rows from two or more tables based on a related column (usually a foreign key).



SELECT Employee.EmpName, Department.DeptName
FROM Employee
RIGHT JOIN Department ON Employee.DeptID = Department.DeptID;

✅Result Show :-

Result →

Emoji Examples in HTML



SELECT Employee.EmpName, Department.DeptName
FROM Employee
FULL OUTER JOIN Department ON Employee.DeptID = Department.DeptID;

✅Result Show :-

Result →

Emoji Examples in HTML

1.Can a LEFT JOIN return NULL values if there's no match in the right table?

Yes No

2.Does an INNER JOIN return unmatched rows from either table?

No Yes

3.Is it true that a FULL OUTER JOIN shows only matched rows from both tables?

No Yes