{"id":268,"date":"2012-12-05T11:16:00","date_gmt":"2012-12-05T11:16:00","guid":{"rendered":"8f121ce07d74717e0b1f21d122e04521"},"modified":"2012-12-05T11:16:00","modified_gmt":"2012-12-05T11:16:00","slug":"","status":"publish","type":"post","link":"https:\/\/www.xiaobo.li\/notes\/archives\/268","title":{"rendered":"mysql\u4e2dint\u3001bigint\u3001smallint \u548c tinyint\u7684\u533a\u522b\u4e0e\u957f\u5ea6\u7684\u542b\u4e49"},"content":{"rendered":"
\n

\u6700\u8fd1\u4f7f\u7528mysql\u6570\u636e\u5e93\u7684\u65f6\u5019\u9047\u5230\u4e86\u591a\u79cd\u6570\u5b57\u7684\u7c7b\u578b\uff0c\u4e3b\u8981\u6709int,bigint,smallint\u548ctinyint\u3002\u5176\u4e2d\u6bd4\u8f83\u8ff7\u60d1\u7684\u662fint\u548csmallint\u7684\u5dee\u522b\u3002\u4eca\u5929\u5c31\u5728\u7f51\u4e0a\u4ed4\u7ec6\u627e\u4e86\u627e\uff0c\u627e\u5230\u5982\u4e0b\u5185\u5bb9\uff0c\u7559\u6863\u505a\u4e2a\u603b\u7ed3\uff1a<\/p>\n

\u4f7f\u7528\u6574\u6570\u6570\u636e\u7684\u7cbe\u786e\u6570\u5b57\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

bigint<\/strong><\/p>\n

\u4ece -2^63 (-9223372036854775808) \u5230 2^63-1 (9223372036854775807) \u7684\u6574\u578b\u6570\u636e\uff08\u6240\u6709\u6570\u5b57\uff09\u3002\u5b58\u50a8\u5927\u5c0f\u4e3a 8 \u4e2a\u5b57\u8282\u3002<\/p>\n

P.S.<\/span><\/em> bigint\u5df2\u7ecf\u6709\u957f\u5ea6\u4e86\uff0c\u5728mysql\u5efa\u8868\u4e2d\u7684length\uff0c\u53ea\u662f\u7528\u4e8e\u663e\u793a\u7684\u4f4d\u6570<\/span><\/p>\n<\/p>\n

int<\/strong><\/p>\n

\u4ece -2^31 (-2,147,483,648) \u5230 2^31 \u2013 1 (2,147,483,647) \u7684\u6574\u578b\u6570\u636e\uff08\u6240\u6709\u6570\u5b57\uff09\u3002\u5b58\u50a8\u5927\u5c0f\u4e3a 4 \u4e2a\u5b57\u8282\u3002int <\/strong>\u7684 SQL-92 \u540c\u4e49\u5b57\u4e3a integer<\/strong>\u3002<\/p>\n

smallint<\/strong><\/p>\n

\u4ece -2^15 (-32,768) \u5230 2^15 \u2013 1 (32,767) \u7684\u6574\u578b\u6570\u636e\u3002\u5b58\u50a8\u5927\u5c0f\u4e3a 2 \u4e2a\u5b57\u8282\u3002<\/p>\n

tinyint<\/strong><\/p>\n

\u4ece 0 \u5230 255 \u7684\u6574\u578b\u6570\u636e\u3002\u5b58\u50a8\u5927\u5c0f\u4e3a 1 \u5b57\u8282\u3002<\/p>\n

\u6ce8\u91ca<\/h5>\n

\u5728\u652f\u6301\u6574\u6570\u503c\u7684\u5730\u65b9\u652f\u6301 bigint<\/strong> \u6570\u636e\u7c7b\u578b\u3002\u4f46\u662f\uff0cbigint<\/strong> \u7528\u4e8e\u67d0\u4e9b\u7279\u6b8a\u7684\u60c5\u51b5\uff0c\u5f53\u6574\u6570\u503c\u8d85\u8fc7 int<\/strong> \u6570\u636e\u7c7b\u578b\u652f\u6301\u7684\u8303\u56f4\u65f6\uff0c\u5c31\u53ef\u4ee5\u91c7\u7528 bigint<\/strong>\u3002\u5728 SQL Server \u4e2d\uff0cint<\/strong> \u6570\u636e\u7c7b\u578b\u662f\u4e3b\u8981\u7684\u6574\u6570\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

\u5728\u6570\u636e\u7c7b\u578b\u4f18\u5148\u6b21\u5e8f\u8868\u4e2d\uff0cbigint<\/strong> \u4f4d\u4e8e smallmoney<\/strong> \u548c int<\/strong> \u4e4b\u95f4\u3002<\/p>\n

\u53ea\u6709\u5f53\u53c2\u6570\u8868\u8fbe\u5f0f\u662f bigint<\/strong> \u6570\u636e\u7c7b\u578b\u65f6\uff0c\u51fd\u6570\u624d\u8fd4\u56de bigint<\/strong>\u3002SQL Server \u4e0d\u4f1a\u81ea\u52a8\u5c06\u5176\u5b83\u6574\u6570\u6570\u636e\u7c7b\u578b\uff08tinyint<\/strong>\u3001smallint<\/strong> \u548c int<\/strong>\uff09\u63d0\u5347\u4e3a bigint<\/strong>\u3002<\/p>\n

int(M) \u5728 integer \u6570\u636e\u7c7b\u578b\u4e2d\uff0cM \u8868\u793a\u6700\u5927\u663e\u793a\u5bbd\u5ea6\u3002\u5728 int(M) \u4e2d\uff0cM \u7684\u503c\u8ddf int(M) \u6240\u5360\u591a\u5c11\u5b58\u50a8\u7a7a\u95f4\u5e76\u65e0\u4efb\u4f55\u5173\u7cfb\u3002\u548c\u6570\u5b57\u4f4d\u6570\u4e5f\u65e0\u5173\u7cfb int(3)\u3001int(4)\u3001int(8) \u5728\u78c1\u76d8\u4e0a\u90fd\u662f\u5360\u7528 4 btyes \u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\n

\u6700\u8fd1\u4f7f\u7528mysql\u6570\u636e\u5e93\u7684\u65f6\u5019\u9047\u5230\u4e86\u591a\u79cd\u6570\u5b57\u7684\u7c7b\u578b\uff0c\u4e3b\u8981\u6709int,bigint,smallint\u548ctinyint\u3002\u5176\u4e2d\u6bd4\u8f83\u8ff7\u60d1\u7684\u662fint\u548csmallint\u7684\u5dee\u522b\u3002\u4eca\u5929\u5c31\u5728\u7f51\u4e0a\u4ed4\u7ec6\u627e\u4e86\u627e\uff0c\u627e\u5230\u5982\u4e0b\u5185\u5bb9\uff0c\u7559\u6863\u505a\u4e2a\u603b\u7ed3\uff1a<\/p>\n

\u4f7f\u7528\u6574\u6570\u6570\u636e\u7684\u7cbe\u786e\u6570\u5b57\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

bigint<\/strong><\/p>\n

\u4ece -2^63 (-9223372036854775808) \u5230 2^63-1 (9223372036854775807) \u7684\u6574\u578b\u6570\u636e\uff08\u6240\u6709\u6570\u5b57\uff09\u3002\u5b58\u50a8\u5927\u5c0f\u4e3a 8 \u4e2a\u5b57\u8282\u3002<\/p>\n

P.S.<\/span><\/em> bigint\u5df2\u7ecf\u6709\u957f\u5ea6\u4e86\uff0c\u5728mysql\u5efa\u8868\u4e2d\u7684length\uff0c\u53ea\u662f\u7528\u4e8e\u663e\u793a\u7684\u4f4d\u6570<\/span><\/p>\n

int<\/strong><\/p>\n

\u4ece -2^31 (-2,147,483,648) \u5230 2^31 \u2013 1 (2...<\/p>\n<\/div>\n

\u7ee7\u7eed\u9605\u8bfb →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[288],"tags":[89,2],"class_list":["post-268","post","type-post","status-publish","format-standard","hentry","category-db","tag-int","tag-MySQL"],"_links":{"self":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/268","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/comments?post=268"}],"version-history":[{"count":0,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/posts\/268\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/media?parent=268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/categories?post=268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xiaobo.li\/notes\/wp-json\/wp\/v2\/tags?post=268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}