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发布时间:2013-12-17 16:17:56
tinyint,smallint,mediumint,int,bigint。分别使用8,16,24,32,64位存储空间,取值范围是-2^(n-1)到2^(n-1)-1,n是存储位数,如:tinyint存储范围是0 ~ 255,tinyint unsigned是-128 ~ 127unsigned(不准有负值)tinyintsmallintmediumintint.........【阅读全文】