{"id":60427,"date":"2024-10-13T02:46:14","date_gmt":"2024-10-12T18:46:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60427\/"},"modified":"2024-10-13T02:46:14","modified_gmt":"2024-10-12T18:46:14","slug":"db2%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8%e5%92%8coracle%e7%9a%84%e6%af%94%e8%bc%83","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60427\/","title":{"rendered":"DB2\u5e38\u7528\u51fd\u6578\u548cOracle\u7684\u6bd4\u8f03"},"content":{"rendered":"<h1 id=\"db2%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8%e5%92%8coracle%e7%9a%84%e6%af%94%e8%bc%83-BUomyIuiMo\">DB2\u5e38\u7528\u51fd\u6578\u548cOracle\u7684\u6bd4\u8f03<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cIBM\u7684DB2\u548cOracle\u662f\u5169\u500b\u975e\u5e38\u6d41\u884c\u7684\u9078\u64c7\u3002\u9019\u5169\u8005\u5404\u6709\u5176\u7279\u9ede\u548c\u512a\u52e2\uff0c\u5c24\u5176\u5728\u51fd\u6578\u7684\u4f7f\u7528\u4e0a\uff0c\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u3002\u672c\u6587\u5c07\u5c0dDB2\u5e38\u7528\u51fd\u6578\u8207Oracle\u7684\u51fd\u6578\u9032\u884c\u6bd4\u8f03\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u5169\u7a2e\u6578\u64da\u5eab\u7684\u5dee\u7570\u3002<\/p>\n<h2 id=\"1-%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%99%95%e7%90%86%e5%87%bd%e6%95%b8-BUomyIuiMo\">1. \u5b57\u7b26\u4e32\u8655\u7406\u51fd\u6578<\/h2>\n<p>\u5728\u5b57\u7b26\u4e32\u8655\u7406\u65b9\u9762\uff0cDB2\u548cOracle\u90fd\u63d0\u4f9b\u4e86\u8c50\u5bcc\u7684\u51fd\u6578\u4f86\u64cd\u4f5c\u5b57\u7b26\u4e32\u3002<\/p>\n<h3 id=\"1-1-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-BUomyIuiMo\">1.1 \u5b57\u7b26\u4e32\u9577\u5ea6<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>LENGTH(string)<\/code> \u51fd\u6578\u4f86\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002<\/li>\n<li>Oracle: \u4f7f\u7528 <code>LENGTH(string)<\/code> \u51fd\u6578\uff0c\u529f\u80fd\u76f8\u540c\u3002<\/li>\n<\/ul>\n<h3 id=\"1-2-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%80%a3%e6%8e%a5-BUomyIuiMo\">1.2 \u5b57\u7b26\u4e32\u9023\u63a5<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>CONCAT(string1, string2)<\/code> \u6216\u8005\u4f7f\u7528 <code>string1 || string2<\/code> \u4f86\u9023\u63a5\u5b57\u7b26\u4e32\u3002<\/li>\n<li>Oracle: \u4f7f\u7528 <code>string1 || string2<\/code> \u4f86\u9023\u63a5\u5b57\u7b26\u4e32\uff0c\u6c92\u6709 <code>CONCAT<\/code> \u51fd\u6578\u3002<\/li>\n<\/ul>\n<h2 id=\"2-%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8-BUomyIuiMo\">2. \u6578\u5b78\u51fd\u6578<\/h2>\n<p>\u6578\u5b78\u51fd\u6578\u5728\u6578\u64da\u5206\u6790\u4e2d\u975e\u5e38\u91cd\u8981\uff0cDB2\u548cOracle\u90fd\u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u5b78\u51fd\u6578\u3002<\/p>\n<h3 id=\"2-1-%e7%b5%95%e5%b0%8d%e5%80%bc-BUomyIuiMo\">2.1 \u7d55\u5c0d\u503c<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>ABS(number)<\/code> \u51fd\u6578\u4f86\u7372\u53d6\u6578\u5b57\u7684\u7d55\u5c0d\u503c\u3002<\/li>\n<li>Oracle: \u540c\u6a23\u4f7f\u7528 <code>ABS(number)<\/code> \u51fd\u6578\u3002<\/li>\n<\/ul>\n<h3 id=\"2-2-%e5%9b%9b%e6%8d%a8%e4%ba%94%e5%85%a5-BUomyIuiMo\">2.2 \u56db\u6368\u4e94\u5165<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>ROUND(number, decimal_places)<\/code> \u51fd\u6578\u4f86\u9032\u884c\u56db\u6368\u4e94\u5165\u3002<\/li>\n<li>Oracle: \u4e5f\u4f7f\u7528 <code>ROUND(number, decimal_places)<\/code> \u51fd\u6578\uff0c\u529f\u80fd\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8-BUomyIuiMo\">3. \u65e5\u671f\u548c\u6642\u9593\u51fd\u6578<\/h2>\n<p>\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u5728\u6578\u64da\u5eab\u4e2d\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\uff0cDB2\u548cOracle\u5728\u9019\u65b9\u9762\u7684\u51fd\u6578\u4e5f\u6709\u4e00\u4e9b\u5dee\u7570\u3002<\/p>\n<h3 id=\"3-1-%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f-BUomyIuiMo\">3.1 \u7576\u524d\u65e5\u671f<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>CURRENT DATE<\/code> \u7372\u53d6\u7576\u524d\u65e5\u671f\u3002<\/li>\n<li>Oracle: \u4f7f\u7528 <code>SYSDATE<\/code> \u7372\u53d6\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\u3002<\/li>\n<\/ul>\n<h3 id=\"3-2-%e6%97%a5%e6%9c%9f%e5%8a%a0%e6%b8%9b-BUomyIuiMo\">3.2 \u65e5\u671f\u52a0\u6e1b<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>DATEADD(interval, number, date)<\/code> \u4f86\u9032\u884c\u65e5\u671f\u52a0\u6e1b\u3002<\/li>\n<li>Oracle: \u4f7f\u7528 <code>date + number<\/code> \u4f86\u9032\u884c\u65e5\u671f\u52a0\u6e1b\uff0c\u9019\u88e1\u7684 <code>number<\/code> \u662f\u4ee5\u5929\u70ba\u55ae\u4f4d\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8-BUomyIuiMo\">4. \u805a\u5408\u51fd\u6578<\/h2>\n<p>\u805a\u5408\u51fd\u6578\u5728\u6578\u64da\u5206\u6790\u4e2d\u975e\u5e38\u91cd\u8981\uff0cDB2\u548cOracle\u90fd\u63d0\u4f9b\u4e86\u591a\u7a2e\u805a\u5408\u51fd\u6578\u3002<\/p>\n<h3 id=\"4-1-%e8%a8%88%e6%95%b8-BUomyIuiMo\">4.1 \u8a08\u6578<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>COUNT(column_name)<\/code> \u4f86\u8a08\u7b97\u884c\u6578\u3002<\/li>\n<li>Oracle: \u540c\u6a23\u4f7f\u7528 <code>COUNT(column_name)<\/code>\u3002<\/li>\n<\/ul>\n<h3 id=\"4-2-%e5%b9%b3%e5%9d%87%e5%80%bc-BUomyIuiMo\">4.2 \u5e73\u5747\u503c<\/h3>\n<ul>\n<li>DB2: \u4f7f\u7528 <code>AVG(column_name)<\/code> \u4f86\u8a08\u7b97\u5e73\u5747\u503c\u3002<\/li>\n<li>Oracle: \u4e5f\u4f7f\u7528 <code>AVG(column_name)<\/code>\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-BUomyIuiMo\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u9ad4\u4f86\u770b\uff0cDB2\u548cOracle\u5728\u51fd\u6578\u7684\u8a2d\u8a08\u4e0a\u6709\u8a31\u591a\u76f8\u4f3c\u4e4b\u8655\uff0c\u4f46\u4e5f\u5b58\u5728\u4e00\u4e9b\u7d30\u5fae\u7684\u5dee\u7570\u3002\u958b\u767c\u8005\u5728\u9078\u64c7\u6578\u64da\u5eab\u6642\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u548c\u6280\u8853\u8981\u6c42\u4f86\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u7121\u8ad6\u662f\u9078\u64c7DB2\u9084\u662fOracle\uff0c\u4e86\u89e3\u5176\u5e38\u7528\u51fd\u6578\u7684\u7279\u6027\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u958b\u767c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u65b9\u6848\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6bd4\u8f03DB2\u548cOracle\u7684\u5e38\u7528\u51fd\u6578\uff0c\u6df1\u5165\u5206\u6790\u5169\u8005\u5728\u6578\u64da\u8655\u7406\u548c\u67e5\u8a62\u6027\u80fd\u4e0a\u7684\u7570\u540c\uff0c\u52a9\u60a8\u9078\u64c7\u6700\u4f73\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\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-60427","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60427","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=60427"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60427\/revisions"}],"predecessor-version":[{"id":60428,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60427\/revisions\/60428"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}