直接上码： select 'bigint unsigned' as type ,'8' as bytes ,~0 as max_num,0 as min_num unionselect 'int unsigned','4',~032,0 unionselect 'mediumint unsigned','3',~040,0 unionselect 'smallint unsigned','2',~048,0 unionselect 'tinyint uns
直接上码：
select 'bigint unsigned' as type ,'8' as bytes ,~0 as max_num,0 as min_num union
select 'int unsigned','4',~0>>32,0 union
select 'mediumint unsigned','3',~0>>40,0 union
select 'smallint unsigned','2',~0>>48,0 union
select 'tinyint unsigned','1',~0>>56,0 union
select 'signed bigint','8',~0>>1,-(1<<63) union
select 'signed int','4',~0>>33,-(1<<31) union
select 'signed mediumint','3',~0>>41,-(1<<23) union
select 'signed smallint','2',~0>>49,-(1<<15) union
select '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)
以上这篇MySQL一个语句查出各种整形占用字节数及最大最小值的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持每日运维。
