max length of int in mysql code example

Example 1: mysql get max value and id

SELECT a.id, a.rev, a.contents
FROM YourTable a
INNER JOIN (
    SELECT id, MAX(rev) rev
    FROM YourTable
    GROUP BY id
) b ON a.id = b.id AND a.rev = b.rev

Example 2: max length found in mysql

SELECT city, max(length(city)) FROM Customers;

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