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## Overview
**`SQL UPDATE JOIN`** is used to update the data of one table by using the data of some other table and some `JOIN` conditions.

## Syntax



UPDATE tableName  
JOIN tableName 
ON tableName.colName = tableName.colName  
SET tableName.colName = tableName.colName;

## Code example
Let's look at an example to understand the concept.

Suppose we have a table `Employee` with the following data:

We have another table named `Manager` with the following data:


Now we write a query in which we update the values of the `Employee` table by using the values of `Manager` table for the rows where `Age` is equal to `21` or `25`. We also want to update the `Name` and the `City`.  

UPDATE Employee
        INNER JOIN
    Manager ON Employee.Age = Manager.Age 
SET 
    Employee.Name = Manager.Name,
    Employee.City = Manager.City
WHERE Employee.Age IN (21, 25);

SELECT * FROM Employee;

## Explanation

- Line 1: We update the `Employee` table.

- Line 3: We join both the tables on the basis of their age. 

- Lines 5 to 6: We set the name and the city of `Employee` to be the same as the name and city of `Manager`.

- Line 7: Rows are updated only if the age equals 21 or 25.

- Line 9: We display the data of the `Employee` table to the console.

How to update data using JOIN

Update a table's data using another table via JOIN conditions, setting specific columns and filtered by criteria.