{"id":160177,"date":"2024-11-03T20:55:30","date_gmt":"2024-11-03T12:55:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160177\/"},"modified":"2024-11-03T20:55:31","modified_gmt":"2024-11-03T12:55:31","slug":"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-months_between","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160177\/","title":{"rendered":"OceanBase \u6559\u7a0b\uff1aOceanBase MONTHS_BETWEEN"},"content":{"rendered":"<h1 id=\"oceanbase-%e6%95%99%e7%a8%8b%ef%bc%9aoceanbase-months_between-pCyDJmVxQo\">OceanBase \u6559\u7a0b\uff1aOceanBase MONTHS_BETWEEN<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cOceanBase \u4f5c\u70ba\u4e00\u500b\u9ad8\u6027\u80fd\u7684\u5206\u4f48\u5f0f\u6578\u64da\u5eab\uff0c\u8d8a\u4f86\u8d8a\u53d7\u5230\u958b\u767c\u8005\u7684\u9752\u775e\u3002\u5b83\u4e0d\u50c5\u652f\u6301\u9ad8\u4e26\u767c\u7684\u4e8b\u52d9\u8655\u7406\uff0c\u9084\u5177\u5099\u826f\u597d\u7684\u64f4\u5c55\u6027\u548c\u5bb9\u932f\u80fd\u529b\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e OceanBase \u4e2d\u7684 <code>MONTHS_BETWEEN<\/code> \u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u4f86\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-months_between-%e5%87%bd%e6%95%b8%ef%bc%9f-pCyDJmVxQo\">\u4ec0\u9ebc\u662f MONTHS_BETWEEN \u51fd\u6578\uff1f<\/h2>\n<p><code>MONTHS_BETWEEN<\/code> \u51fd\u6578\u662f\u4e00\u500b\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u76f8\u5dee\u7684\u6708\u4efd\u6578\u7684\u6578\u5b78\u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u4e00\u500b\u6d6e\u9ede\u6578\uff0c\u8868\u793a\u5f9e\u7b2c\u4e00\u500b\u65e5\u671f\u5230\u7b2c\u4e8c\u500b\u65e5\u671f\u7684\u5b8c\u6574\u6708\u4efd\u6578\u3002\u9019\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u8a08\u7b97\u79df\u7d04\u7684\u6301\u7e8c\u6642\u9593\u3001\u8a08\u7b97\u5229\u606f\u7b49\u3002<\/p>\n<h2 id=\"months_between-%e5%87%bd%e6%95%b8%e7%9a%84%e8%aa%9e%e6%b3%95-pCyDJmVxQo\">MONTHS_BETWEEN \u51fd\u6578\u7684\u8a9e\u6cd5<\/h2>\n<pre><code>MONTHS_BETWEEN(date1, date2)<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>date1<\/code> \u548c <code>date2<\/code> \u662f\u8981\u9032\u884c\u6bd4\u8f03\u7684\u5169\u500b\u65e5\u671f\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>date1<\/code> \u662f\u8d77\u59cb\u65e5\u671f\uff0c\u800c <code>date2<\/code> \u662f\u7d50\u675f\u65e5\u671f\u3002\u5982\u679c <code>date1<\/code> \u665a\u65bc <code>date2<\/code>\uff0c\u5247\u8fd4\u56de\u7684\u503c\u5c07\u662f\u8ca0\u6578\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-pCyDJmVxQo\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528 <code>MONTHS_BETWEEN<\/code> \u51fd\u6578\u7684\u793a\u4f8b\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5176\u7528\u6cd5\uff1a<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-1%ef%bc%9a%e8%a8%88%e7%ae%97%e5%85%a9%e5%80%8b%e6%97%a5%e6%9c%9f%e4%b9%8b%e9%96%93%e7%9a%84%e6%9c%88%e4%bb%bd%e6%95%b8-pCyDJmVxQo\">\u793a\u4f8b 1\uff1a\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u6708\u4efd\u6578<\/h3>\n<pre><code>SELECT MONTHS_BETWEEN('2023-10-01', '2022-01-01') AS months_difference;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u8a08\u7b97\u5f9e 2022 \u5e74 1 \u6708 1 \u65e5\u5230 2023 \u5e74 10 \u6708 1 \u65e5\u4e4b\u9593\u7684\u6708\u4efd\u6578\u3002\u57f7\u884c\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f 21\uff0c\u8868\u793a\u5169\u8005\u4e4b\u9593\u76f8\u5dee 21 \u500b\u5b8c\u6574\u7684\u6708\u4efd\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-2%ef%bc%9a%e8%99%95%e7%90%86%e8%b2%a0%e5%80%bc-pCyDJmVxQo\">\u793a\u4f8b 2\uff1a\u8655\u7406\u8ca0\u503c<\/h3>\n<pre><code>SELECT MONTHS_BETWEEN('2022-01-01', '2023-10-01') AS months_difference;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u53cd\u8f49\u4e86\u65e5\u671f\u7684\u9806\u5e8f\uff0c\u5f9e\u800c\u8a08\u7b97\u5f9e 2023 \u5e74 10 \u6708 1 \u65e5\u5230 2022 \u5e74 1 \u6708 1 \u65e5\u7684\u6708\u4efd\u6578\u3002\u57f7\u884c\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f -21\uff0c\u8868\u793a <code>date1<\/code> \u665a\u65bc <code>date2<\/code>\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-3%ef%bc%9a%e8%88%87%e5%85%b6%e4%bb%96%e5%87%bd%e6%95%b8%e7%b5%90%e5%90%88%e4%bd%bf%e7%94%a8-pCyDJmVxQo\">\u793a\u4f8b 3\uff1a\u8207\u5176\u4ed6\u51fd\u6578\u7d50\u5408\u4f7f\u7528<\/h3>\n<p>\u60a8\u9084\u53ef\u4ee5\u5c07 <code>MONTHS_BETWEEN<\/code> \u51fd\u6578\u8207\u5176\u4ed6\u65e5\u671f\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u7372\u5f97\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u8a08\u7b97\u7576\u524d\u65e5\u671f\u8207\u67d0\u500b\u7279\u5b9a\u65e5\u671f\u4e4b\u9593\u7684\u6708\u4efd\u6578\uff1a<\/p>\n<pre><code>SELECT MONTHS_BETWEEN(CURRENT_DATE, '2020-05-15') AS months_since;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u81ea 2020 \u5e74 5 \u6708 15 \u65e5\u4ee5\u4f86\u7684\u5b8c\u6574\u6708\u4efd\u6578\uff0c\u5e6b\u52a9\u60a8\u4e86\u89e3\u81ea\u90a3\u6642\u4ee5\u4f86\u7d93\u904e\u4e86\u591a\u5c11\u6642\u9593\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-pCyDJmVxQo\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u78ba\u4fdd\u65e5\u671f\u683c\u5f0f\u6b63\u78ba\uff0cOceanBase \u652f\u6301\u7684\u65e5\u671f\u683c\u5f0f\u70ba &#8216;YYYY-MM-DD&#8217;\u3002<\/li>\n<li>\u5982\u679c\u4efb\u4e00\u65e5\u671f\u70ba NULL\uff0c\u5247 <code>MONTHS_BETWEEN<\/code> \u51fd\u6578\u5c07\u8fd4\u56de NULL\u3002<\/li>\n<li>\u8fd4\u56de\u7684\u7d50\u679c\u662f\u6d6e\u9ede\u6578\uff0c\u53ef\u80fd\u5305\u542b\u5c0f\u6578\u90e8\u5206\uff0c\u9019\u8868\u793a\u4e0d\u5b8c\u6574\u7684\u6708\u4efd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pCyDJmVxQo\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86 OceanBase \u4e2d\u7684 <code>MONTHS_BETWEEN<\/code> \u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u4e86\u591a\u500b\u5be6\u7528\u7684\u793a\u4f8b\u4f86\u5e6b\u52a9\u60a8\u7406\u89e3\u5176\u7528\u6cd5\u3002\u9019\u500b\u51fd\u6578\u5728\u8655\u7406\u65e5\u671f\u8a08\u7b97\u6642\u975e\u5e38\u6709\u7528\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\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\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how to use OceanBase MONTHS_BETWEEN function effectively in this comprehensive tutorial, enhancing your database management skills.<\/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-160177","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160177","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=160177"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160177\/revisions"}],"predecessor-version":[{"id":160178,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160177\/revisions\/160178"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}