{"id":15491,"date":"2023-12-04T20:23:59","date_gmt":"2023-12-04T12:23:59","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15491"},"modified":"2023-12-04T20:25:20","modified_gmt":"2023-12-04T12:25:20","slug":"oracle-zhong-yong-shen-me-han-shu-huo-de-ri-qi-he","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-yong-shen-me-han-shu-huo-de-ri-qi-he\/","title":{"rendered":"Oracle \u4e2d\u7528\u4ec0\u4e48\u51fd\u6570\u83b7\u5f97\u65e5\u671f\uff1f\u548c\u65e5\u671f\u4e2d\u7684\u65e5\u6708\u5e74\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\u6765\u83b7\u53d6\u65e5\u671f\u548c\u65e5\u671f\u4e2d\u7684\u5e74\u3001\u6708\u3001\u65e5\u7b49\u90e8\u5206\uff1a<\/p>\n<p><strong>\u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff1a<\/strong><br \/>\n&#8211; <code>SYSDATE<\/code>\uff1a\u8fd4\u56de\u5f53\u524d\u7684\u7cfb\u7edf\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/p>\n<p><strong>\u63d0\u53d6\u65e5\u671f\u90e8\u5206\u7684\u51fd\u6570\uff1a<\/strong><br \/>\n&#8211; <code>TO_CHAR(date, 'YYYY-MM-DD')<\/code>\uff1a\u5c06\u65e5\u671f\u8f6c\u6362\u4e3a\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d <code>'YYYY'<\/code> \u662f\u5e74\u4efd\uff0c<code>'MM'<\/code> \u662f\u6708\u4efd\uff0c<code>'DD'<\/code> \u662f\u65e5\u671f\u90e8\u5206\u3002<br \/>\n&#8211; <code>EXTRACT(YEAR\/MONTH\/DAY FROM date)<\/code>\uff1a\u4ece\u65e5\u671f\u4e2d\u63d0\u53d6\u5e74\u3001\u6708\u3001\u65e5\u90e8\u5206\u3002<\/p>\n<p>\u4e3e\u4f8b\uff1a<\/p>\n<pre><code class=\"language-sql  line-numbers\">SELECT SYSDATE FROM dual; -- \u8fd4\u56de\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\n\nSELECT TO_CHAR(SYSDATE, 'YYYY') AS year,\n       TO_CHAR(SYSDATE, 'MM') AS month,\n       TO_CHAR(SYSDATE, 'DD') AS day\nFROM dual; -- \u8fd4\u56de\u5f53\u524d\u5e74\u3001\u6708\u3001\u65e5\u90e8\u5206\n\nSELECT EXTRACT(YEAR FROM SYSDATE) AS year,\n       EXTRACT(MONTH FROM SYSDATE) AS month,\n       EXTRACT(DAY FROM SYSDATE) AS day\nFROM dual; -- \u4e5f\u53ef\u4ee5\u7528 EXTRACT \u51fd\u6570\u63d0\u53d6\u5e74\u3001\u6708\u3001\u65e5\u90e8\u5206\n<\/code><\/pre>\n<p>\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u4f60\u4ece\u65e5\u671f\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u5e74\u3001\u6708\u3001\u65e5\u7b49\u90e8\u5206\uff0c\u6216\u8005\u83b7\u53d6\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u51fd\u6570\u6765\u83b7\u53d6\u65e5\u671f\u548c\u65e5\u671f\u4e2d\u7684\u5e74\u3001\u6708\u3001\u65e5\u7b49\u90e8\u5206\uff1a \u83b7\u53d6\u5f53\u524d\u65e5\u671f\u548c\u65f6\u95f4\uff1a &#038;#82 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15491","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15491"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15491\/revisions"}],"predecessor-version":[{"id":15492,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15491\/revisions\/15492"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15491"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}