select 'bigint unsigned' as type ,Ǝ' as bytes ,~0 as max_num,0 as min_num unionselect 'int unsigned',Ɗ',~0>>32,0 unionselect 'mediumint unsigned',Ɖ',~0>>40,0 unionselect 'smallint unsigned',ƈ',~0>>48,0 unionselect 'tinyint unsigned',Ƈ',~0>>56,0 unionselect 'signed bigint',Ǝ',~0>>1,-(1<<word">63) unionselect 'signed int',Ɗ',~0>>33,-(1<<word">31) unionselect 'signed mediumint',Ɖ',~0>>41,-(1<<23) unionselect 'signed smallint',ƈ',~0>>49,-(1<<15) unionselect 'signed tinyint',Ƈ',~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)【mysql一个语句查出来】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
http://m.bbyears.com/shujuku/132900.html
推荐访问:mysql增删改查语句 mysql建表语句