sql - MySQL Select minimum/maximum among two (or more) given values

Question

Is it possible to SELECT the minimum or maximum among two or more values. I'd need something like this:

SELECT MAX_VALUE(A.date0, B.date0) AS date0, MIN_VALUE(A.date1, B.date1) AS date1
FROM A, B
WHERE B.x = A.x

Can I achieve this by only using MySQL?

Answer 1

You can use LEAST and GREATEST function to achieve it.

SELECT
    GREATEST(A.date0, B.date0) AS date0,
    LEAST(A.date1, B.date1) AS date1
FROM A, B
WHERE B.x = A.x

Both are described here http://dev.mysql.com/doc/refman/5.0/en/comparison-operators.html