{"id":9421,"date":"2022-07-27T16:46:07","date_gmt":"2022-07-27T08:46:07","guid":{"rendered":"https:\/\/blog.ywdevops.cn\/?p=9421"},"modified":"2022-07-27T17:24:01","modified_gmt":"2022-07-27T09:24:01","slug":"mysql-8","status":"publish","type":"post","link":"https:\/\/blog.ywdevops.cn\/index.php\/2022\/07\/27\/mysql-8\/","title":{"rendered":"MySQL\u81ea\u52a8\u6dfb\u52a0\u7cfb\u7edf\u65f6\u95f4"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">mysql\u65f6\u95f4\u7c7b\u578b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>DATE\u7c7b\u578b\uff1a\u5b58\u50a8\u5e74\u6708\u65e5<\/li><li>TIME\u7c7b\u578b\uff1a\u5b58\u50a8\u65f6\u5206\u79d2<\/li><li>DATETIME\u7c7b\u578b\uff1a\u5b58\u50a8YYYY-MM-DD HH:MM:SS<\/li><li>TIMESTAMP\u7c7b\u578b\uff1a\u5b58\u50a8YYYYMMDDHHMMSS<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4f7f\u7528mysql\u6570\u636e\u5e93\u65f6\uff0c\u5e38\u7528\u7684\u7c7b\u578b\u5c31\u662fdate\u548cdatetime<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">datetime\u548ctimestamp\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>\u90fd\u53ef\u4ee5\u7528\u6765\u5b58\u50a8\uff1a\u5e74\u6708\u65e5\u65f6\u5206\u79d2\uff0c\u4e24\u8005\u90fd\u53ef\u4ee5\u7cbe\u786e\u5230\u6beb\u79d2\uff0c\u6bd4\u5982\uff1adatetime(3)\u3001timestamp(3)\uff0c\u5c31\u662f\u7cbe\u786e\u5230\u4e09\u4f4d\u6beb\u79d2\u503c<\/li><li>timestamp\u66f4\u9002\u5408\u8de8\u65f6\u533a\u7684\u4e1a\u52a1\uff0cmysql5.6.4\u4e4b\u540e\u7684\u7248\u672c\uff0c\u53ef\u4ee5\u7cbe\u786e\u5230\u6beb\u79d2\uff0c\u5e76\u4e14\u53ef\u4ee5\u6307\u5b9a<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">mysql\u7684\u65f6\u95f4\u7c7b\u578b\u6709\u4e24\u4e2a\u5c5e\u6027\uff0c\u5206\u522b\u662fCURRENT_TIMESTAMP \u548cON UPDATE CURRENT_TIMESTAMP\u4e24\u79cd\uff0c\u4f7f\u7528\u60c5\u51b5\u5206\u522b\u5982\u4e0b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1\u3001CURRENT_TIMESTAMP\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8981\u5411\u6570\u636e\u5e93\u6267\u884cinsert\u64cd\u4f5c\u65f6\uff0c\u5982\u679c\u6709\u4e2atimestamp\u5b57\u6bb5\u5c5e\u6027\u8bbe\u4e3aCURRENT_TIMESTAMP\uff0c\u5219\u65e0\u8bba\u8fd9\u4e2a\u5b57\u6bb5\u6709\u6728\u6709set\u503c\u90fd\u63d2\u5165\u5f53\u524d\u7cfb\u7edf\u65f6\u95f4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2\u3001ON UPDATE CURRENT_TIMESTAMP\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u6267\u884cupdate\u64cd\u4f5c\u662f\uff0c\u5e76\u4e14\u5b57\u6bb5\u6709ON UPDATE CURRENT_TIMESTAMP\u5c5e\u6027\u3002\u5219\u5b57\u6bb5\u65e0\u8bba\u503c\u6709\u6ca1\u6709\u53d8\u5316\uff0c\u4ed6\u7684\u503c\u4e5f\u4f1a\u8ddf\u7740\u66f4\u65b0\u4e3a\u5f53\u524dUPDATE\u64cd\u4f5c\u65f6\u7684\u65f6\u95f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a\u521b\u5efa\u8868\u540d\u65f6\u5019\u6307\u5b9a\u521b\u5efa\u65f6\u95f4\u548c\u4fee\u6539\u65f6\u95f4\u5b57\u6bb5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE `example` (\n`id` INTEGER UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 'ID\u4fe1\u606f',\n`name` varchar(100) NOT NULL DEFAULT \"\" COMMENT '\u59d3\u540d',\n`age`  int  NOT NULL COMMENT '\u5e74\u9f84',\n`created` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '\u521b\u5efa\u65f6\u95f4',\n`modified` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '\u4fee\u6539\u65f6\u95f4',\nPRIMARY KEY (`id`)\n) ENGINE=InnoDB DEFAULT CHARSET=utf8;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u67e5\u770b\u8868\u7ed3\u6784\uff0cdesc example\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"728\" height=\"251\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/7-1.png\" alt=\"\" class=\"wp-image-9437\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/7-1.png 728w, 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class=\"wp-block-paragraph\">\u6267\u884c\u66f4\u65b0\u547d\u4ee4\u540e\uff0c\u518d\u6b21\u67e5\u770b\u4fee\u6539\u65f6\u95f4\uff0c\u5982\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"707\" height=\"243\" src=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/6-1.png\" alt=\"\" class=\"wp-image-9434\" srcset=\"https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/6-1.png 707w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/6-1-300x103.png 300w, https:\/\/blog.ywdevops.cn\/wp-content\/uploads\/2022\/07\/6-1-600x206.png 600w\" sizes=\"auto, (max-width: 707px) 100vw, 707px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u7ed3\uff1a\u5b57\u6bb5\u7684\u9ed8\u8ba4\u503c\u8bbe\u7f6eCURRENT_TIMESTAMP\u7684\u65f6\u5019\uff0c\u6dfb\u52a0\u65b0\u5185\u5bb9\u7684\u65f6\u5019\uff0c\u5bf9\u5e94\u7684\u65f6\u95f4\u4f1a\u586b\u5145\u4e3a\u5f53\u524d\u65f6\u95f4\uff0c\u4f46\u662f\u4fee\u6539\u7684\u65f6\u5019\u65f6\u95f4\u4fdd\u6301\u4e0d\u53d8\uff0c\u5982\u679c\u9ed8\u8ba4\u503c\u8bbe\u7f6e\u4e3aCURRENT_TIMESTAMP\u00a0ON\u00a0UPDATE\u00a0CURRENT_TIMESTAMP\uff0c\u6dfb\u52a0\u65b0\u5185\u5bb9\u7684\u65f6\u5019\uff0c\u5bf9\u5e94\u7684\u65f6\u95f4\u4f1a\u586b\u5145\u4e3a\u5f53\u524d\u65f6\u95f4\uff0c\u4fee\u6539\u7684\u65f6\u5019\uff0c\u65f6\u95f4\u4e5f\u4f1a\u5237\u65b0\u4e3a\u5f53\u524d\u4fee\u6539\u7684\u65f6\u95f4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6ce8\u610f\uff1a\u4e0a\u8ff0\u521b\u5efa\u8868\u7684\u5b57\u6bb5\u7c7b\u578b\u4ecetimestamp\u6539\u4e3adatetime\u4e5f\u662f\u53ef\u4ee5\u7684\uff0cCOMMENT\u8868\u793a\u6ce8\u91ca\uff0c\u53ef\u4ee5\u77e5\u9053\u6b64\u5b57\u6bb5\u4f5c\u7528<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql\u65f6\u95f4\u7c7b\u578b\uff1a DATE\u7c7b\u578b\uff1a\u5b58\u50a8\u5e74\u6708\u65e5 TIME\u7c7b\u578b\uff1a\u5b58\u50a8\u65f6\u5206\u79d2 DATETIME\u7c7b\u578b\uff1a\u5b58\u50a8YYYY- [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":9425,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,25],"tags":[],"class_list":["post-9421","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mysql","category-database"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"_links":{"self":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9421","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/comments?post=9421"}],"version-history":[{"count":14,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9421\/revisions"}],"predecessor-version":[{"id":9440,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/posts\/9421\/revisions\/9440"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media\/9425"}],"wp:attachment":[{"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/media?parent=9421"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/categories?post=9421"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.ywdevops.cn\/index.php\/wp-json\/wp\/v2\/tags?post=9421"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}