mysql在所有行上左联接最大值

Question

I have the following table:

Table Scores:

+----+-------+
| Id | value |
+----+-------+
|  1 |   300 |
|  2 |   300 |
|  3 |   300 |
|  4 |   100 |
|  5 |   200 |
+----+-------+

What I need as a result of the query:

+----+-------+
| Id | value |
+----+-------+
|  1 |   300 |
|  2 |   300 |
|  3 |   300 |
|  4 |   300 |
|  5 |   300 |
+----+-------+

With what query can I achieve this?

(this is just part of a complex query, this would help a lot to minimize my code)

Answer 1

You could cross join the table with a query that returns the max value:

SELECT     id, max_value
FROM       scores
CROSS JOIN (SELECT MAX(value) AS max_value 
            FROM scores) m