{"id":154535,"date":"2024-11-02T16:37:17","date_gmt":"2024-11-02T08:37:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154535\/"},"modified":"2024-11-02T16:37:18","modified_gmt":"2024-11-02T08:37:18","slug":"%e5%b0%8d-mysql-%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8%e7%9a%84%e5%85%a7%e5%ae%b9%e6%a6%82%e6%8b%ac","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154535\/","title":{"rendered":"\u5c0d MySQL \u65e5\u671f\u51fd\u6578\u7684\u5167\u5bb9\u6982\u62ec"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-mysql-%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8%e7%9a%84%e5%85%a7%e5%ae%b9%e6%a6%82%e6%8b%ac-eUOAmPTvBT\">\u5c0d MySQL \u65e5\u671f\u51fd\u6578\u7684\u5167\u5bb9\u6982\u62ec<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u5c24\u5176\u662f\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u6642\u3002MySQL \u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u5f37\u5927\u7684\u65e5\u671f\u51fd\u6578\uff0c\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u8655\u7406\u548c\u64cd\u4f5c\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u3002\u672c\u6587\u5c07\u5c0d MySQL \u7684\u65e5\u671f\u51fd\u6578\u9032\u884c\u6982\u62ec\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-eUOAmPTvBT\">1. \u65e5\u671f\u51fd\u6578\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>MySQL \u4e2d\u7684\u65e5\u671f\u51fd\u6578\u4e3b\u8981\u7528\u65bc\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b\u3002\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u7372\u53d6\u7576\u524d\u65e5\u671f\u3001\u8a08\u7b97\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3001\u683c\u5f0f\u5316\u65e5\u671f\u7b49\u3002MySQL \u652f\u6301\u7684\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b\u5305\u62ec DATE\u3001DATETIME\u3001TIMESTAMP\u3001TIME \u548c YEAR\u3002<\/p>\n<h2 id=\"2-%e5%b8%b8%e7%94%a8%e7%9a%84-mysql-%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8-eUOAmPTvBT\">2. \u5e38\u7528\u7684 MySQL \u65e5\u671f\u51fd\u6578<\/h2>\n<h3 id=\"2-1-now-eUOAmPTvBT\">2.1 NOW()<\/h3>\n<p>NOW() \u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u5b83\u8fd4\u56de\u7684\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\u3002<\/p>\n<pre><code>SELECT NOW();<\/code><\/pre>\n<h3 id=\"2-2-curdate-%e5%92%8c-curtime-eUOAmPTvBT\">2.2 CURDATE() \u548c CURTIME()<\/h3>\n<p>CURDATE() \u51fd\u6578\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\uff0c\u800c CURTIME() \u51fd\u6578\u5247\u8fd4\u56de\u7576\u524d\u7684\u6642\u9593\u3002<\/p>\n<pre><code>SELECT CURDATE();  -- \u8fd4\u56de\u7576\u524d\u65e5\u671f\nSELECT CURTIME();   -- \u8fd4\u56de\u7576\u524d\u6642\u9593<\/code><\/pre>\n<h3 id=\"2-3-date_format-eUOAmPTvBT\">2.3 DATE_FORMAT()<\/h3>\n<p>DATE_FORMAT() \u51fd\u6578\u7528\u65bc\u683c\u5f0f\u5316\u65e5\u671f\u3002\u7528\u6236\u53ef\u4ee5\u6307\u5b9a\u8f38\u51fa\u7684\u683c\u5f0f\uff0c\u4f8b\u5982 &#8216;YYYY\/MM\/DD&#8217; \u6216 &#8216;DD-MM-YYYY&#8217;\u3002<\/p>\n<pre><code>SELECT DATE_FORMAT(NOW(), '%Y\/%m\/%d');<\/code><\/pre>\n<h3 id=\"2-4-datediff-eUOAmPTvBT\">2.4 DATEDIFF()<\/h3>\n<p>DATEDIFF() \u51fd\u6578\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\u3002\u5b83\u7684\u8fd4\u56de\u503c\u662f\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u5929\u6578\u3002<\/p>\n<pre><code>SELECT DATEDIFF('2023-10-01', '2023-09-01');  -- \u8fd4\u56de 30<\/code><\/pre>\n<h3 id=\"2-5-adddate-%e5%92%8c-subdate-eUOAmPTvBT\">2.5 ADDDATE() \u548c SUBDATE()<\/h3>\n<p>ADDDATE() \u51fd\u6578\u7528\u65bc\u5728\u6307\u5b9a\u7684\u65e5\u671f\u4e0a\u52a0\u4e0a\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\uff0c\u800c SUBDATE() \u5247\u7528\u65bc\u5f9e\u6307\u5b9a\u7684\u65e5\u671f\u4e2d\u6e1b\u53bb\u6642\u9593\u9593\u9694\u3002<\/p>\n<pre><code>SELECT ADDDATE('2023-10-01', INTERVAL 10 DAY);  -- \u8fd4\u56de '2023-10-11'\nSELECT SUBDATE('2023-10-01', INTERVAL 10 DAY);  -- \u8fd4\u56de '2023-09-21'<\/code><\/pre>\n<h3 id=\"2-6-year-month-day-eUOAmPTvBT\">2.6 YEAR(), MONTH(), DAY()<\/h3>\n<p>\u9019\u4e9b\u51fd\u6578\u5206\u5225\u7528\u65bc\u63d0\u53d6\u65e5\u671f\u4e2d\u7684\u5e74\u4efd\u3001\u6708\u4efd\u548c\u65e5\u671f\u90e8\u5206\u3002<\/p>\n<pre><code>SELECT YEAR(NOW());  -- \u8fd4\u56de\u7576\u524d\u5e74\u4efd\nSELECT MONTH(NOW());  -- \u8fd4\u56de\u7576\u524d\u6708\u4efd\nSELECT DAY(NOW());    -- \u8fd4\u56de\u7576\u524d\u65e5\u671f<\/code><\/pre>\n<h2 id=\"3-%e6%97%a5%e6%9c%9f%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-eUOAmPTvBT\">3. \u65e5\u671f\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>MySQL \u7684\u65e5\u671f\u51fd\u6578\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\u3002\u4f8b\u5982\uff0c\u5728\u5831\u544a\u4e2d\u9700\u8981\u986f\u793a\u67d0\u500b\u6642\u9593\u7bc4\u570d\u5167\u7684\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 DATEDIFF() \u51fd\u6578\u4f86\u8a08\u7b97\u6642\u9593\u5dee\uff0c\u6216\u8005\u4f7f\u7528 DATE_FORMAT() \u51fd\u6578\u4f86\u683c\u5f0f\u5316\u65e5\u671f\u4ee5\u4fbf\u65bc\u95b1\u8b80\u3002\u6b64\u5916\uff0c\u9019\u4e9b\u51fd\u6578\u4e5f\u53ef\u4ee5\u7528\u65bc\u6578\u64da\u6e05\u7406\u548c\u8f49\u63db\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n<h2 id=\"4-%e5%b0%8f%e7%b5%90-eUOAmPTvBT\">4. \u5c0f\u7d50<\/h2>\n<p>MySQL \u63d0\u4f9b\u7684\u65e5\u671f\u51fd\u6578\u70ba\u7528\u6236\u5728\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u6642\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u652f\u6301\u3002\u901a\u904e\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\uff0c\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u7372\u53d6\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\u3001\u8a08\u7b97\u65e5\u671f\u5dee\u7570\u3001\u683c\u5f0f\u5316\u65e5\u671f\u7b49\u3002\u638c\u63e1\u9019\u4e9b\u51fd\u6578\u7684\u4f7f\u7528\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4e0a\u4f7f\u7528 MySQL \u65e5\u671f\u51fd\u6578\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6216\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u65e5\u671f\u51fd\u6578\u7684\u57fa\u672c\u7528\u6cd5\uff0c\u5305\u62ec\u65e5\u671f\u683c\u5f0f\u5316\u3001\u8a08\u7b97\u548c\u6bd4\u8f03\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-154535","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=154535"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154535\/revisions"}],"predecessor-version":[{"id":154536,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154535\/revisions\/154536"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}