匿名通过本文主要向大家介绍了MySQL，整形占用，字节数等相关知识,希望本文的分享对您有所帮助
下面小编就为大家带来一篇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。
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)
以上就是MySQL使用一个语句就可以查出各种整形占用字节数及最大最小值的示例代码的详细内容，更多请关注微课江湖其它相关文章！