Length of int bigint smallint and tinyint in mysql

The length of int bigint smallint and tinyint in mysql int www.2cto.com int from-2 ^ 31 (-2,147,483,648) to 2 ^ 31-1 (2,147,483,647) integer data (all numbers ), the storage size is 4 bytes, And the SQL-92 of the int Is integer. If the unsigned attribute (unsigned => positive number) is selected, it is a 10-bit integer data of 2 ^ 31*2 + 1 (2147483647*2 + 1 = 4294967295, the storage size is 4 bytes. Mediumint if the unsigned (unsigned => positive) attribute is selected, it is (8388607*2 + 1 = 16777215) 8-bit integer data, and the storage size is 2 bytes. Smallint is an integer from-2 ^ 15 (-32,768) to 2 ^ 15-1 (32,767). The storage size is 2 bytes. If the unsigned attribute (unsigned => positive number) is selected, it is 2 ^ 15*2 + 1 (32767*2 + 1 = 65535) 6-bit integer data, the storage size is 2 bytes. Integer Data of tinyint from 0 to 255. The storage size is 1 byte.