Answers for "select max int from varchar mysql"

mysql mediumint max value

--			SIGNED										  UNSIGNED
--			Min               		Max                   Min Max
TINYINT     -128                    127                   0   255
SMALLINT    -32767                  32767                 0   65535
MEDIUMINT   -8388608                388608                0   16777215
INT         -2147483648             2147483647            0   4294967295
INTEGER     -2147483648             2147483647            0   4294967295
BIGINT      -9223372036854775808    9223372036854775808   0   18446744073709551615

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