MySQL UPDATE JOIN: Update Data with Joins

To achieve updating data in MySQL with table join, you can use the UPDATE statement combined with the JOIN statement. The specific steps are as follows:

1. Using the SELECT statement and JOIN statement, query the data that needs to be updated based on the specified conditions. Additionally, include the fields that need to be updated in the SELECT clause of the SELECT statement. For example:

SELECT t1.id, t1.field1, t2.field2
FROM table1 t1
JOIN table2 t2 ON t1.id = t2.id
WHERE t1.condition = 'xxx'

1. Identify the fields that need to be updated and their new values, then use the UPDATE statement to update them based on the results obtained from the previous step, for example:

UPDATE table1 t1
JOIN table2 t2 ON t1.id = t2.id
SET t1.field1 = 'new_value1',
    t2.field2 = 'new_value2'
WHERE t1.condition = 'xxx'

1. By executing the above UPDATE statement, you can update the data in multiple tables.

It is important to adjust the names of tables and fields according to the actual situation, and ensure that the association conditions are accurate. Additionally, when dealing with a large amount of data updates, consider using transactions to guarantee data consistency and integrity.