{"id":60595,"date":"2024-10-13T04:10:21","date_gmt":"2024-10-12T20:10:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60595\/"},"modified":"2024-10-13T04:10:21","modified_gmt":"2024-10-12T20:10:21","slug":"db2%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e7%9a%84%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60595\/","title":{"rendered":"DB2\u65e5\u671f\u6642\u9593\u7684\u57fa\u790e\u77e5\u8b58"},"content":{"rendered":"<h1 id=\"db2%e6%97%a5%e6%9c%9f%e6%99%82%e9%96%93%e7%9a%84%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98-qJrSUjgMpT\">DB2\u65e5\u671f\u6642\u9593\u7684\u57fa\u790e\u77e5\u8b58<\/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\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u591a\u7a2e\u65e5\u671f\u548c\u6642\u9593\u7684\u6578\u64da\u985e\u578b\uff0c\u8b93\u7528\u6236\u80fd\u5920\u6709\u6548\u5730\u5b58\u5132\u548c\u64cd\u4f5c\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39DB2\u4e2d\u65e5\u671f\u548c\u6642\u9593\u7684\u57fa\u672c\u77e5\u8b58\uff0c\u5305\u62ec\u6578\u64da\u985e\u578b\u3001\u51fd\u6578\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-qJrSUjgMpT\">DB2\u4e2d\u7684\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b<\/h2>\n<p>DB2\u652f\u6301\u5e7e\u7a2e\u4e3b\u8981\u7684\u65e5\u671f\u548c\u6642\u9593\u6578\u64da\u985e\u578b\uff0c\u9019\u4e9b\u985e\u578b\u5404\u81ea\u6709\u4e0d\u540c\u7684\u7528\u9014\uff1a<\/p>\n<ul>\n<li><strong>DATE<\/strong>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\uff0c\u683c\u5f0f\u70baYYYY-MM-DD\u3002\u4f8b\u5982\uff0c2023-10-01\u8868\u793a2023\u5e7410\u67081\u65e5\u3002<\/li>\n<li><strong>TIME<\/strong>: \u7528\u65bc\u5b58\u5132\u6642\u9593\uff0c\u683c\u5f0f\u70baHH:MM:SS\u3002\u4f8b\u5982\uff0c14:30:00\u8868\u793a\u4e0b\u53482\u9ede30\u5206\u3002<\/li>\n<li><strong>TIMESTAMP<\/strong>: \u7528\u65bc\u5b58\u5132\u65e5\u671f\u548c\u6642\u9593\u7684\u7d44\u5408\uff0c\u683c\u5f0f\u70baYYYY-MM-DD HH:MM:SS\u3002\u4f8b\u5982\uff0c2023-10-01 14:30:00\u3002<\/li>\n<li><strong>INTERVAL<\/strong>: \u7528\u65bc\u8868\u793a\u6642\u9593\u9593\u9694\uff0c\u53ef\u4ee5\u662f\u5e74\u3001\u6708\u3001\u65e5\u3001\u6642\u3001\u5206\u6216\u79d2\u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e6%93%8d%e4%bd%9c%e5%87%bd%e6%95%b8-qJrSUjgMpT\">\u65e5\u671f\u548c\u6642\u9593\u7684\u64cd\u4f5c\u51fd\u6578<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u64cd\u4f5c\u65e5\u671f\u548c\u6642\u9593\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><strong>CURRENT DATE<\/strong>: \u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u3002<\/li>\n<li><strong>CURRENT TIME<\/strong>: \u8fd4\u56de\u7576\u524d\u7684\u6642\u9593\u3002<\/li>\n<li><strong>CURRENT TIMESTAMP<\/strong>: \u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<li><strong>DATE()<\/strong>: \u5f9eTIMESTAMP\u4e2d\u63d0\u53d6\u65e5\u671f\u90e8\u5206\u3002<\/li>\n<li><strong>TIME()<\/strong>: \u5f9eTIMESTAMP\u4e2d\u63d0\u53d6\u6642\u9593\u90e8\u5206\u3002<\/li>\n<li><strong>ADD_MONTHS(date, n)<\/strong>: \u5c07\u6307\u5b9a\u7684\u6708\u4efd\u6578\u6dfb\u52a0\u5230\u65e5\u671f\u4e2d\u3002<\/li>\n<li><strong>DATEDIFF(date1, date2)<\/strong>: \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-qJrSUjgMpT\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\u4ee3\u78bc\uff0c\u5c55\u793a\u5982\u4f55\u5728DB2\u4e2d\u4f7f\u7528\u9019\u4e9b\u51fd\u6578\uff1a<\/p>\n<pre><code>\n-- \u7372\u53d6\u7576\u524d\u65e5\u671f\nSELECT CURRENT DATE FROM SYSIBM.SYSDUMMY1;\n\n-- \u7372\u53d6\u7576\u524d\u6642\u9593\nSELECT CURRENT TIME FROM SYSIBM.SYSDUMMY1;\n\n-- \u7372\u53d6\u7576\u524d\u6642\u9593\u6233\nSELECT CURRENT TIMESTAMP FROM SYSIBM.SYSDUMMY1;\n\n-- \u5f9e\u6642\u9593\u6233\u4e2d\u63d0\u53d6\u65e5\u671f\nSELECT DATE(CURRENT TIMESTAMP) FROM SYSIBM.SYSDUMMY1;\n\n-- \u5c073\u500b\u6708\u6dfb\u52a0\u5230\u7576\u524d\u65e5\u671f\nSELECT ADD_MONTHS(CURRENT DATE, 3) FROM SYSIBM.SYSDUMMY1;\n\n-- \u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\nSELECT DATEDIFF(DATE('2023-10-01'), DATE('2023-09-01')) AS DIFF FROM SYSIBM.SYSDUMMY1;\n<\/code><\/pre>\n<h2 id=\"%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e6%a0%bc%e5%bc%8f%e5%8c%96-qJrSUjgMpT\">\u65e5\u671f\u548c\u6642\u9593\u7684\u683c\u5f0f\u5316<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u683c\u5f0f\u5316\u53ef\u4ee5\u901a\u904e\u4f7f\u7528FORMAT\u51fd\u6578\u4f86\u5be6\u73fe\u3002\u9019\u5c0d\u65bc\u751f\u6210\u5831\u544a\u6216\u986f\u793a\u7528\u6236\u53cb\u597d\u7684\u65e5\u671f\u548c\u6642\u9593\u683c\u5f0f\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>\n-- \u5c07\u65e5\u671f\u683c\u5f0f\u5316\u70baYYYY\/MM\/DD\nSELECT VARCHAR_FORMAT(CURRENT DATE, 'YYYY\/MM\/DD') AS FORMATTED_DATE FROM SYSIBM.SYSDUMMY1;\n\n-- \u5c07\u6642\u9593\u683c\u5f0f\u5316\u70baHH:MM AM\/PM\nSELECT VARCHAR_FORMAT(CURRENT TIME, 'HH:MM AM') AS FORMATTED_TIME FROM SYSIBM.SYSDUMMY1;\n<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-qJrSUjgMpT\">\u7d50\u8ad6<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u65e5\u671f\u548c\u6642\u9593\u8655\u7406\u529f\u80fd\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u9748\u6d3b\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u77e5\u8b58\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u61c9\u7528\u958b\u767c\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u9032\u884c\u6578\u64da\u5206\u6790\u9084\u662f\u751f\u6210\u5831\u544a\uff0c\u638c\u63e1DB2\u4e2d\u7684\u65e5\u671f\u548c\u6642\u9593\u64cd\u4f5c\u90fd\u80fd\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u6709\u95dc\u6578\u64da\u5eab\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u63a2\u7d22\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3DB2\u65e5\u671f\u6642\u9593\u7684\u57fa\u790e\u77e5\u8b58\uff0c\u5305\u62ec\u6578\u64da\u985e\u578b\u3001\u683c\u5f0f\u53ca\u64cd\u4f5c\uff0c\u52a9\u60a8\u6709\u6548\u7ba1\u7406\u548c\u67e5\u8a62\u6642\u9593\u6578\u64da\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60595","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60595","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60595"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60595\/revisions"}],"predecessor-version":[{"id":60596,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60595\/revisions\/60596"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}