{"id":7056,"date":"2024-11-14T08:25:39","date_gmt":"2024-11-14T00:25:39","guid":{"rendered":"https:\/\/fwq.ai\/blog\/7056\/"},"modified":"2024-11-14T08:25:39","modified_gmt":"2024-11-14T00:25:39","slug":"mysql-%e6%95%b0%e5%ad%97%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e8%a7%a3%e9%87%8a","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/7056\/","title":{"rendered":"MySQL \u6570\u5b57\u6570\u636e\u7c7b\u578b\u89e3\u91ca"},"content":{"rendered":"

\"MySQL<\/p>\n

MySQL \u4e2d\u7684\u6570\u5b57\u6570\u636e\u7c7b\u578b\u6709\u52a9\u4e8e\u7ba1\u7406\u548c\u4f18\u5316\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u3001\u6027\u80fd\u548c\u7cbe\u5ea6\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u9009\u62e9\u6b63\u786e\u7684\u7c7b\u578b\u6765\u6709\u6548\u7ba1\u7406\u4e0d\u540c\u8303\u56f4\u7684\u6570\u503c\uff0c\u4ece\u5fae\u5c0f\u7684\u6574\u6570\u5230\u5927\u89c4\u6a21\u7684\u6d6e\u70b9\u6570\u3002 <\/p>\n

\u672c\u6307\u5357\u63d0\u4f9b\u4e86 MySQL \u6570\u5b57\u7c7b\u578b\u7684\u7ec6\u5206\uff0c\u5e2e\u52a9\u60a8\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u8981\u6c42\u505a\u51fa\u660e\u667a\u7684\u51b3\u7b56\u3002<\/p>\n

\u6570\u5b57\u6570\u636e\u7c7b\u578b <\/h3>\n

MySQL\u652f\u6301\u9488\u5bf9\u7279\u5b9a\u573a\u666f\u5b9a\u5236\u7684\u5404\u79cd\u6570\u503c\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

TINYINT\uff0c<\/strong> \u975e\u5e38\u9002\u5408\u5b58\u50a8\u6700\u5927 255 \u7684\u5c0f\u6574\u6570\u3002\u901a\u5e38\u7528\u4e8e\u4e8c\u8fdb\u5236\u6807\u5fd7\u6216\u5c0f\u503c\u8ba1\u6570\uff0c\u4f8b\u5982\u72b6\u6001\u3002<\/p>\n

SMALLINT,<\/strong> \u5904\u7406\u6700\u5927 65,535 \u7684\u503c\u3002\u5b83\u975e\u5e38\u9002\u5408\u4e2d\u7b49\u6570\u636e\u8303\u56f4\uff0c\u4f8b\u5982\u5e74\u9f84\u6216\u6709\u9650\u7684\u5e93\u5b58\u6570\u91cf\u3002<\/p>\n

MEDIUMINT\uff0c<\/strong> \u5bf9\u4e8e 65,536 \u5230 16,777,215 \u4e4b\u95f4\u7684\u503c\uff0c\u5f53\u9700\u8981\u8303\u56f4\u548c\u5b58\u50a8\u6548\u7387\u4e4b\u95f4\u7684\u5e73\u8861\u65f6\uff08\u4f8b\u5982\u4eba\u53e3\u666e\u67e5\u6570\u636e\u6216\u4e2d\u7b49\u89c4\u6a21\uff09\uff0cMEDIUMINT \u975e\u5e38\u5b9e\u7528\u3002<\/p>\n

INT,<\/strong> \u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u7684\u9996\u9009\u6574\u6570\u7c7b\u578b\uff0c\u6700\u591a\u53ef\u5bb9\u7eb3 4,294,967,295 \u7684\u503c\u3002\u9002\u5408ID\u3001\u8ba1\u6570\u5668\u7b49\u5404\u79cd\u5e38\u89c1\u6570\u636e\u9700\u6c42\u3002<\/p>\n

BIGINT\uff0c<\/strong>\u5bf9\u4e8e\u5b58\u50a8\u8d85\u51faINT\u8303\u56f4\u7684\u6781\u5927\u6570\u5b57\u81f3\u5173\u91cd\u8981\uff0c\u9002\u5408\u6570\u636e\u91cf\u5927\u6216\u8d22\u52a1\u8bb0\u5f55\u7cbe\u786e\u7684\u5e94\u7528\u3002<\/p>\n

\u5341\u8fdb\u5236\uff0c<\/strong> \u6700\u9002\u5408\u5b9a\u70b9\u7cbe\u5ea6\uff0c\u5bf9\u4e8e\u9700\u8981\u7cbe\u786e\u8868\u793a\u7684\u8d22\u52a1\u6216\u5176\u4ed6\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

FLOAT\/DOUBLE\uff0c<\/strong> \u9002\u7528\u4e8e\u5b58\u50a8\u7cbe\u5ea6\u4e0d\u662f\u4e3b\u8981\u95ee\u9898\u7684\u8fd1\u4f3c\u6570\u503c\uff0c\u4f8b\u5982\u79d1\u5b66\u6570\u636e\u6216\u4e00\u822c\u6d4b\u91cf\u3002<\/p>\n

BIT\uff0c<\/strong> \u6709\u6548\u5b58\u50a8\u4e8c\u8fdb\u5236\u72b6\u6001\uff0c\u5bf9\u4e8e\u6807\u5fd7\u3001\u5f00\u5173\u6216\u7b80\u5355\u7684\u5f00\/\u5173\u6307\u793a\u5668\u5f88\u6709\u7528\u3002<\/p>\n

\u5e38\u95ee\u95ee\u9898 <\/h3>\n

\u4e2d\u7b49\u8303\u56f4\u503c\u5e94\u8be5\u4f7f\u7528\u4ec0\u4e48\u6570\u5b57\u7c7b\u578b\uff1f<\/strong><\/p>\n

MEDIUMINT \u5bf9\u4e8e\u6570\u767e\u4e07\u8303\u56f4\u5185\u7684\u6570\u636e\u6709\u6548\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u5b58\u50a8\u7684\u9009\u9879\uff0c\u800c\u65e0\u9700 INT \u7684\u5f00\u9500\u3002<\/p>\n

DECIMAL \u9002\u5408\u975e\u8d27\u5e01\u7cbe\u5ea6\u6570\u636e\u5417\uff1f<\/strong><\/p>\n

\u662f\u7684\uff0cDECIMAL \u9002\u7528\u4e8e\u4efb\u4f55\u9700\u8981\u7cbe\u786e\u5341\u8fdb\u5236\u8868\u793a\u7684\u573a\u666f\uff0c\u4f8b\u5982\u79d1\u5b66\u6570\u636e\u70b9\u3002<\/p>\n

\u6211\u9700\u8981 SQL \u5ba2\u6237\u7aef\u6765\u7ba1\u7406\u6570\u5b57\u6570\u636e\u7c7b\u578b\u5417\uff1f<\/strong><\/p>\n

SQL \u5ba2\u6237\u7aef\u6709\u52a9\u4e8e\u9ad8\u6548\u53ef\u89c6\u5316\u548c\u7ba1\u7406\u6570\u5b57\u6570\u636e\u7c7b\u578b\uff0c\u63d0\u4f9b\u4f18\u5316\u548c\u6027\u80fd\u76d1\u63a7\u5de5\u5177\u3002<\/p>\n

\u8d22\u52a1\u6570\u636e\u5e94\u8be5\u9009\u62e9 INT \u8fd8\u662f BIGINT\uff1f<\/strong><\/p>\n

\u5982\u679c\u60a8\u7684\u6570\u636e\u503c\u5728 INT \u8303\u56f4\u5185\uff0c\u8bf7\u4f7f\u7528 INT\u3002\u5bf9\u4e8e\u8d85\u51fa\u8303\u56f4\u7684\u4efb\u4f55\u60c5\u51b5\uff0cBIGINT \u53ef\u786e\u4fdd\u4e0d\u4f1a\u56e0\u6ea2\u51fa\u800c\u4e22\u5931\u6570\u636e\u3002<\/p>\n

\u7ed3\u8bba <\/h3>\n

\u4e86\u89e3 MySQL \u6570\u5b57\u6570\u636e\u7c7b\u578b\u6709\u52a9\u4e8e\u786e\u4fdd\u6570\u636e\u5e93\u7ed3\u6784\u9ad8\u6548\u4e14\u9ad8\u6027\u80fd\u3002\u901a\u8fc7\u6839\u636e\u9700\u6c42\u8c03\u6574\u6570\u636e\u7c7b\u578b\u9009\u62e9\uff0c\u60a8\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u63d0\u9ad8\u5b58\u50a8\u6548\u7387\u3002\u8981\u66f4\u6df1\u5165\u5730\u4e86\u89e3\u6bcf\u79cd\u7c7b\u578b\uff0c\u8bf7\u53c2\u9605\u539f\u59cb\u6587\u7ae0\u3002<\/p>\n

\u4ee5\u4e0a\u5c31\u662fMySQL \u6570\u5b57\u6570\u636e\u7c7b\u578b\u89e3\u91ca\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

MySQL \u4e2d\u7684\u6570\u5b57\u6570\u636e\u7c7b\u578b\u6709\u52a9\u4e8e\u7ba1\u7406\u548c\u4f18\u5316\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u5b58\u50a8\u3001\u6027\u80fd\u548c\u7cbe\u5ea6\u3002\u5f00\u53d1\u4eba\u5458\u9700\u8981\u9009\u62e9\u6b63\u786e\u7684\u7c7b\u578b\u6765\u6709\u6548\u7ba1\u7406\u4e0d\u540c\u8303\u56f4\u7684\u6570\u503c\uff0c\u4ece\u5fae\u5c0f\u7684\u6574\u6570\u5230\u5927\u89c4\u6a21\u7684\u6d6e\u70b9\u6570\u3002 \u672c\u6307\u5357\u63d0\u4f9b\u4e86 MySQL \u6570\u5b57\u7c7b\u578b\u7684\u7ec6\u5206\uff0c\u5e2e\u52a9\u60a8\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u8981\u6c42\u505a\u51fa\u660e\u667a\u7684\u51b3\u7b56\u3002 \u6570\u5b57\u6570\u636e\u7c7b\u578b MySQL\u652f\u6301\u9488\u5bf9\u7279\u5b9a\u573a\u666f\u5b9a\u5236\u7684\u5404\u79cd\u6570\u503c\u6570\u636e\u7c7b\u578b\u3002 TINYINT\uff0c \u975e\u5e38\u9002\u5408\u5b58\u50a8\u6700\u5927 255 \u7684\u5c0f\u6574\u6570\u3002\u901a\u5e38\u7528\u4e8e\u4e8c\u8fdb\u5236\u6807\u5fd7\u6216\u5c0f\u503c\u8ba1\u6570\uff0c\u4f8b\u5982\u72b6\u6001\u3002 SMALLINT, \u5904\u7406\u6700\u5927 65,535 \u7684\u503c\u3002\u5b83\u975e\u5e38\u9002\u5408\u4e2d\u7b49\u6570\u636e\u8303\u56f4\uff0c\u4f8b\u5982\u5e74\u9f84\u6216\u6709\u9650\u7684\u5e93\u5b58\u6570\u91cf\u3002 MEDIUMINT\uff0c \u5bf9\u4e8e 65,536 \u5230 16,777,215 \u4e4b\u95f4\u7684\u503c\uff0c\u5f53\u9700\u8981\u8303\u56f4\u548c\u5b58\u50a8\u6548\u7387\u4e4b\u95f4\u7684\u5e73\u8861\u65f6\uff08\u4f8b\u5982\u4eba\u53e3\u666e\u67e5\u6570\u636e\u6216\u4e2d\u7b49\u89c4\u6a21\uff09\uff0cMEDIUMINT \u975e\u5e38\u5b9e\u7528\u3002 INT, \u5927\u591a\u6570\u5e94\u7528\u7a0b\u5e8f\u7684\u9996\u9009\u6574\u6570\u7c7b\u578b\uff0c\u6700\u591a\u53ef\u5bb9\u7eb3 4,294,967,295 \u7684\u503c\u3002\u9002\u5408ID\u3001\u8ba1\u6570\u5668\u7b49\u5404\u79cd\u5e38\u89c1\u6570\u636e\u9700\u6c42\u3002 BIGINT\uff0c\u5bf9\u4e8e\u5b58\u50a8\u8d85\u51faINT\u8303\u56f4\u7684\u6781\u5927\u6570\u5b57\u81f3\u5173\u91cd\u8981\uff0c\u9002\u5408\u6570\u636e\u91cf\u5927\u6216\u8d22\u52a1\u8bb0\u5f55\u7cbe\u786e\u7684\u5e94\u7528\u3002 \u5341\u8fdb\u5236\uff0c \u6700\u9002\u5408\u5b9a\u70b9\u7cbe\u5ea6\uff0c\u5bf9\u4e8e\u9700\u8981\u7cbe\u786e\u8868\u793a\u7684\u8d22\u52a1\u6216\u5176\u4ed6\u81f3\u5173\u91cd\u8981\u3002 FLOAT\/DOUBLE\uff0c \u9002\u7528\u4e8e\u5b58\u50a8\u7cbe\u5ea6\u4e0d\u662f\u4e3b\u8981\u95ee\u9898\u7684\u8fd1\u4f3c\u6570\u503c\uff0c\u4f8b\u5982\u79d1\u5b66\u6570\u636e\u6216\u4e00\u822c\u6d4b\u91cf\u3002 BIT\uff0c \u6709\u6548\u5b58\u50a8\u4e8c\u8fdb\u5236\u72b6\u6001\uff0c\u5bf9\u4e8e\u6807\u5fd7\u3001\u5f00\u5173\u6216\u7b80\u5355\u7684\u5f00\/\u5173\u6307\u793a\u5668\u5f88\u6709\u7528\u3002 \u5e38\u95ee\u95ee\u9898 \u4e2d\u7b49\u8303\u56f4\u503c\u5e94\u8be5\u4f7f\u7528\u4ec0\u4e48\u6570\u5b57\u7c7b\u578b\uff1f MEDIUMINT \u5bf9\u4e8e\u6570\u767e\u4e07\u8303\u56f4\u5185\u7684\u6570\u636e\u6709\u6548\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u5b58\u50a8\u7684\u9009\u9879\uff0c\u800c\u65e0\u9700 INT \u7684\u5f00\u9500\u3002 DECIMAL \u9002\u5408\u975e\u8d27\u5e01\u7cbe\u5ea6\u6570\u636e\u5417\uff1f \u662f\u7684\uff0cDECIMAL \u9002\u7528\u4e8e\u4efb\u4f55\u9700\u8981\u7cbe\u786e\u5341\u8fdb\u5236\u8868\u793a\u7684\u573a\u666f\uff0c\u4f8b\u5982\u79d1\u5b66\u6570\u636e\u70b9\u3002 \u6211\u9700\u8981 SQL \u5ba2\u6237\u7aef\u6765\u7ba1\u7406\u6570\u5b57\u6570\u636e\u7c7b\u578b\u5417\uff1f SQL \u5ba2\u6237\u7aef\u6709\u52a9\u4e8e\u9ad8\u6548\u53ef\u89c6\u5316\u548c\u7ba1\u7406\u6570\u5b57\u6570\u636e\u7c7b\u578b\uff0c\u63d0\u4f9b\u4f18\u5316\u548c\u6027\u80fd\u76d1\u63a7\u5de5\u5177\u3002 \u8d22\u52a1\u6570\u636e\u5e94\u8be5\u9009\u62e9 INT \u8fd8\u662f BIGINT\uff1f \u5982\u679c\u60a8\u7684\u6570\u636e\u503c\u5728 INT \u8303\u56f4\u5185\uff0c\u8bf7\u4f7f\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-7056","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=7056"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/7056\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=7056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=7056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=7056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}