{"id":61003,"date":"2024-10-13T07:37:14","date_gmt":"2024-10-12T23:37:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61003\/"},"modified":"2024-10-13T07:37:14","modified_gmt":"2024-10-12T23:37:14","slug":"db2%e4%b8%ad%e6%9c%89%e9%97%9c%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e5%87%bd%e6%95%b8%e5%8f%8a%e6%87%89%e7%94%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61003\/","title":{"rendered":"DB2\u4e2d\u6709\u95dc\u65e5\u671f\u548c\u6642\u9593\u7684\u51fd\u6578\u53ca\u61c9\u7528"},"content":{"rendered":"<h1 id=\"db2%e4%b8%ad%e6%9c%89%e9%97%9c%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e5%87%bd%e6%95%b8%e5%8f%8a%e6%87%89%e7%94%a8-FvLsiUHpMv\">DB2\u4e2d\u6709\u95dc\u65e5\u671f\u548c\u6642\u9593\u7684\u51fd\u6578\u53ca\u61c9\u7528<\/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\u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u9019\u4e9b\u51fd\u6578\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u5404\u7a2e\u8a08\u7b97\u548c\u683c\u5f0f\u5316\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u4ecb\u7d39DB2\u4e2d\u6709\u95dc\u65e5\u671f\u548c\u6642\u9593\u7684\u4e3b\u8981\u51fd\u6578\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"1-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-FvLsiUHpMv\">1. \u65e5\u671f\u548c\u6642\u9593\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u65e5\u671f\u548c\u6642\u9593\u7684\u6578\u64da\u985e\u578b\u4e3b\u8981\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>DATE<\/code>\uff1a\u8868\u793a\u65e5\u671f\uff0c\u683c\u5f0f\u70baYYYY-MM-DD\u3002<\/li>\n<li><code>TIME<\/code>\uff1a\u8868\u793a\u6642\u9593\uff0c\u683c\u5f0f\u70baHH:MM:SS\u3002<\/li>\n<li><code>TIMESTAMP<\/code>\uff1a\u8868\u793a\u65e5\u671f\u548c\u6642\u9593\u7684\u7d44\u5408\uff0c\u683c\u5f0f\u70baYYYY-MM-DD HH:MM:SS\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e5%b8%b8%e7%94%a8%e7%9a%84%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8-FvLsiUHpMv\">2. \u5e38\u7528\u7684\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u8655\u7406\u65e5\u671f\u548c\u6642\u9593\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u51fd\u6578\uff1a<\/p>\n<h3 id=\"2-1-current-date-%e5%92%8c-current-time-FvLsiUHpMv\">2.1 CURRENT DATE \u548c CURRENT TIME<\/h3>\n<p>\u9019\u5169\u500b\u51fd\u6578\u7528\u65bc\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<pre><code>SELECT CURRENT DATE AS today, CURRENT TIME AS now FROM SYSIBM.SYSDUMMY1;<\/code><\/pre>\n<h3 id=\"2-2-dateadd-%e5%92%8c-datediff-FvLsiUHpMv\">2.2 DATEADD \u548c DATEDIFF<\/h3>\n<p>\u9019\u4e9b\u51fd\u6578\u7528\u65bc\u65e5\u671f\u7684\u52a0\u6e1b\u904b\u7b97\u3002<\/p>\n<ul>\n<li><code>DATEADD<\/code>\uff1a\u7528\u65bc\u5c07\u6307\u5b9a\u7684\u6642\u9593\u9593\u9694\u52a0\u5230\u65e5\u671f\u4e0a\u3002<\/li>\n<li><code>DATEDIFF<\/code>\uff1a\u7528\u65bc\u8a08\u7b97\u5169\u500b\u65e5\u671f\u4e4b\u9593\u7684\u5dee\u7570\u3002<\/li>\n<\/ul>\n<pre><code>SELECT DATEADD(DAY, 10, CURRENT DATE) AS future_date;<\/code><\/pre>\n<pre><code>SELECT DATEDIFF(DAY, '2023-01-01', CURRENT DATE) AS days_difference;<\/code><\/pre>\n<h3 id=\"2-3-extract-FvLsiUHpMv\">2.3 EXTRACT<\/h3>\n<p>\u6b64\u51fd\u6578\u7528\u65bc\u5f9e\u65e5\u671f\u6216\u6642\u9593\u4e2d\u63d0\u53d6\u7279\u5b9a\u7684\u90e8\u5206\uff0c\u4f8b\u5982\u5e74\u3001\u6708\u3001\u65e5\u7b49\u3002<\/p>\n<pre><code>SELECT EXTRACT(YEAR FROM CURRENT DATE) AS current_year;<\/code><\/pre>\n<h3 id=\"2-4-format-FvLsiUHpMv\">2.4 FORMAT<\/h3>\n<p>\u7528\u65bc\u683c\u5f0f\u5316\u65e5\u671f\u548c\u6642\u9593\u7684\u986f\u793a\u65b9\u5f0f\u3002<\/p>\n<pre><code>SELECT FORMAT(CURRENT TIMESTAMP, 'YYYY-MM-DD HH24:MI:SS') AS formatted_timestamp;<\/code><\/pre>\n<h2 id=\"3-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-FvLsiUHpMv\">3. \u65e5\u671f\u548c\u6642\u9593\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u6709\u591a\u7a2e\u5834\u666f\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u4f8b\u5b50\uff1a<\/p>\n<h3 id=\"3-1-%e5%a0%b1%e5%91%8a%e7%94%9f%e6%88%90-FvLsiUHpMv\">3.1 \u5831\u544a\u751f\u6210<\/h3>\n<p>\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u901a\u5e38\u9700\u8981\u6839\u64da\u65e5\u671f\u7bc4\u570d\u4f86\u7be9\u9078\u6578\u64da\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u67d0\u500b\u6708\u7684\u92b7\u552e\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM sales WHERE sale_date BETWEEN '2023-01-01' AND '2023-01-31';<\/code><\/pre>\n<h3 id=\"3-2-%e6%95%b8%e6%93%9a%e5%88%86%e6%9e%90-FvLsiUHpMv\">3.2 \u6578\u64da\u5206\u6790<\/h3>\n<p>\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u6642\uff0c\u7d93\u5e38\u9700\u8981\u8a08\u7b97\u6642\u9593\u5dee\u7570\uff0c\u4f8b\u5982\u8a08\u7b97\u5ba2\u6236\u7684\u5e73\u5747\u8a02\u55ae\u8655\u7406\u6642\u9593\uff1a<\/p>\n<pre><code>SELECT AVG(DATEDIFF(MINUTE, order_date, delivery_date)) AS avg_processing_time FROM orders;<\/code><\/pre>\n<h3 id=\"3-3-%e8%87%aa%e5%8b%95%e5%8c%96%e4%bb%bb%e5%8b%99-FvLsiUHpMv\">3.3 \u81ea\u52d5\u5316\u4efb\u52d9<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578\u4f86\u8a2d\u7f6e\u81ea\u52d5\u5316\u4efb\u52d9\uff0c\u4f8b\u5982\u5b9a\u671f\u5099\u4efd\u6578\u64da\uff1a<\/p>\n<pre><code>CREATE EVENT backup_event ON SCHEDULE EVERY 1 DAY DO CALL backup_procedure();<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FvLsiUHpMv\">\u7e3d\u7d50<\/h2>\n<p>DB2\u4e2d\u7684\u65e5\u671f\u548c\u6642\u9593\u51fd\u6578\u70ba\u7528\u6236\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u5de5\u5177\u4f86\u8655\u7406\u548c\u5206\u6790\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002\u901a\u904e\u9019\u4e9b\u51fd\u6578\uff0c\u7528\u6236\u53ef\u4ee5\u8f15\u9b06\u5730\u9032\u884c\u65e5\u671f\u8a08\u7b97\u3001\u683c\u5f0f\u5316\u4ee5\u53ca\u6578\u64da\u7be9\u9078\u7b49\u64cd\u4f5c\uff0c\u5f9e\u800c\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u82e5\u60a8\u5c0d\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6<code>\u4e91\u670d\u52a1\u5668<\/code>\u7684\u9700\u6c42\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u4e2d\u65e5\u671f\u548c\u6642\u9593\u7684\u51fd\u6578\u53ca\u5176\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\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-61003","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61003","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=61003"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61003\/revisions"}],"predecessor-version":[{"id":61004,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61003\/revisions\/61004"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}