直接上碼：
select 'bigint unsigned' as type ,'8' as bytes ,~0 as max_num,0 as min_num unionselect 'int unsigned','4',~0>>32,0 unionselect 'mediumint unsigned','3',~0>>40,0 unionselect 'smallint unsigned','2',~0>>48,0 unionselect 'tinyint unsigned','1',~0>>56,0 unionselect 'signed bigint','8',~0>>1,-(1<<63) unionselect 'signed int','4',~0>>33,-(1<<31) unionselect 'signed mediumint','3',~0>>41,-(1<<23) unionselect 'signed smallint','2',~0>>49,-(1<<15) unionselect 'signed tinyint','1',~0>>57,-(1<<7); +--------------------+-------+----------------------+----------------------+| type | bytes | max_num | min_num |+--------------------+-------+----------------------+----------------------+| bigint unsigned | 8 | 18446744073709551615 | 0 || int unsigned | 4 | 4294967295 | 0 || mediumint unsigned | 3 | 16777215 | 0 || smallint unsigned | 2 | 65535 | 0 || tinyint unsigned | 1 | 255 | 0 || signed bigint | 8 | 9223372036854775807 | -9223372036854775808 || signed int | 4 | 2147483647 | -2147483648 || signed mediumint | 3 | 8388607 | -8388608 || signed smallint | 2 | 32767 | -32768 || signed tinyint | 1 | 127 | -128 |+--------------------+-------+----------------------+----------------------+rows in set (0.00 sec)
以上這篇MySQL一個語句查出各種整形占用字節數及最大最小值的實例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持VeVb武林網。
新聞熱點
疑難解答
