{"id":76172,"date":"2024-10-16T04:27:15","date_gmt":"2024-10-15T20:27:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76172\/"},"modified":"2024-10-16T04:27:15","modified_gmt":"2024-10-15T20:27:15","slug":"mysql%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76172\/","title":{"rendered":"MySQL\u65e5\u671f\u6642\u9593\u51fd\u6578\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"mysql%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8%e7%a4%ba%e4%be%8b-WwQEnJmZUZ\">MySQL\u65e5\u671f\u6642\u9593\u51fd\u6578\u793a\u4f8b<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002MySQL\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u65e5\u671f\u6642\u9593\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u9032\u884c\u65e5\u671f\u548c\u6642\u9593\u7684\u8a08\u7b97\u3001\u683c\u5f0f\u5316\u548c\u6bd4\u8f03\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u4e00\u4e9b\u5e38\u7528\u7684MySQL\u65e5\u671f\u6642\u9593\u51fd\u6578\u53ca\u5176\u793a\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\u3002<\/p>\n<h2 id=\"1-now-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">1. NOW() \u51fd\u6578<\/h2>\n<p>NOW() \u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002\u9019\u500b\u51fd\u6578\u4e0d\u9700\u8981\u4efb\u4f55\u53c3\u6578\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u662f\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD HH:MM:SS&#8217;\u3002<\/p>\n<pre><code>SELECT NOW();<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u53ef\u80fd\u6703\u5f97\u5230\u985e\u4f3c\u4ee5\u4e0b\u7684\u7d50\u679c\uff1a<\/p>\n<pre><code>2023-10-01 14:30:00<\/code><\/pre>\n<h2 id=\"2-curdate-%e5%92%8c-curtime-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">2. CURDATE() \u548c CURTIME() \u51fd\u6578<\/h2>\n<p>CURDATE() \u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\uff0c\u800c CURTIME() \u51fd\u6578\u5247\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u6642\u9593\u3002<\/p>\n<pre><code>SELECT CURDATE(), CURTIME();<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u53ef\u80fd\u5982\u4e0b\uff1a<\/p>\n<pre><code>2023-10-01, 14:30:00<\/code><\/pre>\n<h2 id=\"3-date-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">3. DATE() \u51fd\u6578<\/h2>\n<p>DATE() \u51fd\u6578\u7528\u65bc\u5f9e\u65e5\u671f\u6642\u9593\u503c\u4e2d\u63d0\u53d6\u65e5\u671f\u90e8\u5206\u3002\u9019\u5c0d\u65bc\u9700\u8981\u53ea\u95dc\u6ce8\u65e5\u671f\u800c\u5ffd\u7565\u6642\u9593\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>SELECT DATE(NOW());<\/code><\/pre>\n<p>\u7d50\u679c\u5c07\u986f\u793a\u7576\u524d\u7684\u65e5\u671f\uff1a<\/p>\n<pre><code>2023-10-01<\/code><\/pre>\n<h2 id=\"4-date_format-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">4. DATE_FORMAT() \u51fd\u6578<\/h2>\n<p>DATE_FORMAT() \u51fd\u6578\u7528\u65bc\u683c\u5f0f\u5316\u65e5\u671f\u548c\u6642\u9593\u3002\u9019\u500b\u51fd\u6578\u5141\u8a31\u7528\u6236\u81ea\u5b9a\u7fa9\u8f38\u51fa\u7684\u683c\u5f0f\u3002<\/p>\n<pre><code>SELECT DATE_FORMAT(NOW(), '%Y\/%m\/%d %H:%i:%s');<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u53ef\u80fd\u70ba\uff1a<\/p>\n<pre><code>2023\/10\/01 14:30:00<\/code><\/pre>\n<h2 id=\"5-adddate-%e5%92%8c-subdate-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">5. ADDDATE() \u548c SUBDATE() \u51fd\u6578<\/h2>\n<p>ADDDATE() \u51fd\u6578\u7528\u65bc\u5728\u6307\u5b9a\u7684\u65e5\u671f\u4e0a\u6dfb\u52a0\u4e00\u6bb5\u6642\u9593\uff0c\u800c SUBDATE() \u51fd\u6578\u5247\u7528\u65bc\u5f9e\u6307\u5b9a\u7684\u65e5\u671f\u4e2d\u6e1b\u53bb\u4e00\u6bb5\u6642\u9593\u3002<\/p>\n<pre><code>SELECT ADDDATE(NOW(), INTERVAL 7 DAY), SUBDATE(NOW(), INTERVAL 7 DAY);<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u65e5\u671f\u52a0\u4e0a7\u5929\u548c\u6e1b\u53bb7\u5929\u7684\u7d50\u679c\uff1a<\/p>\n<pre><code>2023-10-08, 2023-09-24<\/code><\/pre>\n<h2 id=\"6-datediff-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">6. DATEDIFF() \u51fd\u6578<\/h2>\n<p>DATEDIFF() \u51fd\u6578\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\u5dee\u3002\u9019\u5728\u8a08\u7b97\u4e8b\u4ef6\u4e4b\u9593\u7684\u6642\u9593\u9593\u9694\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>SELECT DATEDIFF('2023-10-01', '2023-09-24');<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u5c07\u986f\u793a\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5929\u6578\uff1a<\/p>\n<pre><code>7<\/code><\/pre>\n<h2 id=\"7-unix_timestamp-%e5%92%8c-from_unixtime-%e5%87%bd%e6%95%b8-WwQEnJmZUZ\">7. UNIX_TIMESTAMP() \u548c FROM_UNIXTIME() \u51fd\u6578<\/h2>\n<p>UNIX_TIMESTAMP() \u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684UNIX\u6642\u9593\u6233\uff0c\u800c FROM_UNIXTIME() \u51fd\u6578\u5247\u7528\u65bc\u5c07UNIX\u6642\u9593\u6233\u8f49\u63db\u70ba\u53ef\u8b80\u7684\u65e5\u671f\u6642\u9593\u683c\u5f0f\u3002<\/p>\n<pre><code>SELECT UNIX_TIMESTAMP(), FROM_UNIXTIME(UNIX_TIMESTAMP());<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u53ef\u80fd\u70ba\uff1a<\/p>\n<pre><code>1696153800, 2023-10-01 14:30:00<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WwQEnJmZUZ\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u6642\u9593\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\u3002\u7121\u8ad6\u662f\u7372\u53d6\u7576\u524d\u6642\u9593\u3001\u683c\u5f0f\u5316\u65e5\u671f\uff0c\u9084\u662f\u8a08\u7b97\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\uff0c\u9019\u4e9b\u51fd\u6578\u90fd\u80fd\u5920\u6709\u6548\u5730\u6eff\u8db3\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u5728\u9999\u6e2f\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u4e86\u89e3\u9019\u4e9b\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\u662f\u975e\u5e38\u5fc5\u8981\u7684\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u8f15\u9b06\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u548c\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u65e5\u671f\u6642\u9593\u51fd\u6578\u7684\u5be6\u7528\u793a\u4f8b\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u8655\u7406\u548c\u683c\u5f0f\u5316\u65e5\u671f\u8207\u6642\u9593\u6578\u64da\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-76172","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76172","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=76172"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76172\/revisions"}],"predecessor-version":[{"id":76173,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76172\/revisions\/76173"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}