Answers for "mysql integer max value"

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

unsigned int in mysql

id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT

mysql biginteger size

For MySQL database:
In BIGINT(8), the number 8 represents how the data will be displayed. It does not affect the storage. The number is used to display width.

BIGINT takes 8 bytes i.e. 64 bits. The signed range is -9223372036854775808 to 9223372036854775807 and unsigned range takes positive value. The range of unsigned is 0 to 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