{"id":60433,"date":"2024-10-13T02:49:13","date_gmt":"2024-10-12T18:49:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60433\/"},"modified":"2024-10-13T02:49:13","modified_gmt":"2024-10-12T18:49:13","slug":"db2%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8%e8%88%87oracle%e6%9c%89%e4%bd%95%e4%b8%8d%e5%90%8c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60433\/","title":{"rendered":"DB2\u5e38\u7528\u51fd\u6578\u8207Oracle\u6709\u4f55\u4e0d\u540c\uff1f"},"content":{"rendered":"<h1 id=\"db2%e5%b8%b8%e7%94%a8%e5%87%bd%e6%95%b8%e8%88%87oracle%e6%9c%89%e4%bd%95%e4%b8%8d%e5%90%8c%ef%bc%9f-BJVKkGKMoo\">DB2\u5e38\u7528\u51fd\u6578\u8207Oracle\u6709\u4f55\u4e0d\u540c\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cIBM\u7684DB2\u548cOracle\u90fd\u662f\u975e\u5e38\u6d41\u884c\u7684\u9078\u64c7\u3002\u96d6\u7136\u5b83\u5011\u90fd\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\u548c\u9748\u6d3b\u6027\uff0c\u4f46\u5728\u51fd\u6578\u7684\u4f7f\u7528\u4e0a\u537b\u5b58\u5728\u4e00\u4e9b\u986f\u8457\u7684\u5dee\u7570\u3002\u672c\u6587\u5c07\u63a2\u8a0eDB2\u548cOracle\u4e4b\u9593\u7684\u5e38\u7528\u51fd\u6578\u5dee\u7570\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u5169\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\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-BJVKkGKMoo\">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\u591a\u7a2e\u51fd\u6578\uff0c\u4f46\u5176\u8a9e\u6cd5\u548c\u529f\u80fd\u7565\u6709\u4e0d\u540c\u3002<\/p>\n<h3 id=\"1-1-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%80%a3%e6%8e%a5-BJVKkGKMoo\">1.1 \u5b57\u7b26\u4e32\u9023\u63a5<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u5b57\u7b26\u4e32\u9023\u63a5\u4f7f\u7528\u201c||\u201d\u904b\u7b97\u7b26\uff0c\u800c\u5728DB2\u4e2d\u5247\u4f7f\u7528\u201cCONCAT\u201d\u51fd\u6578\u3002<\/p>\n<pre><code>-- Oracle\nSELECT 'Hello ' || 'World' AS greeting FROM dual;\n\n-- DB2\nSELECT CONCAT('Hello ', 'World') AS greeting FROM sysibm.sysdummy1;\n<\/code><\/pre>\n<h3 id=\"1-2-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-BJVKkGKMoo\">1.2 \u5b57\u7b26\u4e32\u9577\u5ea6<\/h3>\n<p>\u5728\u8a08\u7b97\u5b57\u7b26\u4e32\u9577\u5ea6\u6642\uff0cOracle\u4f7f\u7528\u201cLENGTH\u201d\u51fd\u6578\uff0c\u800cDB2\u5247\u4f7f\u7528\u201cLENGTH\u201d\u6216\u201cCHAR_LENGTH\u201d\u51fd\u6578\uff0c\u5169\u8005\u7684\u6548\u679c\u76f8\u540c\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cDB2\u7684\u201cCHAR_LENGTH\u201d\u53ef\u80fd\u66f4\u70ba\u7cbe\u78ba\u3002<\/p>\n<pre><code>-- Oracle\nSELECT LENGTH('Hello World') AS length FROM dual;\n\n-- DB2\nSELECT LENGTH('Hello World') AS length FROM sysibm.sysdummy1;\nSELECT CHAR_LENGTH('Hello World') AS char_length FROM sysibm.sysdummy1;\n<\/code><\/pre>\n<h2 id=\"2-%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93%e5%87%bd%e6%95%b8-BJVKkGKMoo\">2. \u65e5\u671f\u548c\u6642\u9593\u51fd\u6578<\/h2>\n<p>\u65e5\u671f\u548c\u6642\u9593\u7684\u8655\u7406\u5728DB2\u548cOracle\u4e2d\u4e5f\u6709\u4e0d\u540c\u7684\u51fd\u6578\u548c\u8a9e\u6cd5\u3002<\/p>\n<h3 id=\"2-1-%e7%95%b6%e5%89%8d%e6%97%a5%e6%9c%9f%e5%92%8c%e6%99%82%e9%96%93-BJVKkGKMoo\">2.1 \u7576\u524d\u65e5\u671f\u548c\u6642\u9593<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u201cSYSDATE\u201d\u4f86\u7372\u53d6\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u800c\u5728DB2\u4e2d\uff0c\u5247\u4f7f\u7528\u201cCURRENT TIMESTAMP\u201d\u3002<\/p>\n<pre><code>-- Oracle\nSELECT SYSDATE AS current_date FROM dual;\n\n-- DB2\nSELECT CURRENT TIMESTAMP AS current_timestamp FROM sysibm.sysdummy1;\n<\/code><\/pre>\n<h3 id=\"2-2-%e6%97%a5%e6%9c%9f%e5%8a%a0%e6%b8%9b-BJVKkGKMoo\">2.2 \u65e5\u671f\u52a0\u6e1b<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u5c0d\u65e5\u671f\u9032\u884c\u52a0\u6e1b\u64cd\u4f5c\uff0c\u800c\u5728DB2\u4e2d\uff0c\u5247\u9700\u8981\u4f7f\u7528\u201cDATE\u201d\u51fd\u6578\u4f86\u9032\u884c\u65e5\u671f\u7684\u52a0\u6e1b\u3002<\/p>\n<pre><code>-- Oracle\nSELECT SYSDATE + 1 AS tomorrow FROM dual;\n\n-- DB2\nSELECT CURRENT DATE + 1 DAYS AS tomorrow FROM sysibm.sysdummy1;\n<\/code><\/pre>\n<h2 id=\"3-%e6%95%b8%e5%ad%b8%e5%87%bd%e6%95%b8-BJVKkGKMoo\">3. \u6578\u5b78\u51fd\u6578<\/h2>\n<p>\u6578\u5b78\u51fd\u6578\u5728DB2\u548cOracle\u4e2d\u4e5f\u6709\u4e00\u4e9b\u5dee\u7570\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u56db\u6368\u4e94\u5165\u548c\u53d6\u6574\u65b9\u9762\u3002<\/p>\n<h3 id=\"3-1-%e5%9b%9b%e6%8d%a8%e4%ba%94%e5%85%a5-BJVKkGKMoo\">3.1 \u56db\u6368\u4e94\u5165<\/h3>\n<p>\u5728Oracle\u4e2d\uff0c\u4f7f\u7528\u201cROUND\u201d\u51fd\u6578\u4f86\u9032\u884c\u56db\u6368\u4e94\u5165\uff0c\u800c\u5728DB2\u4e2d\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528\u201cROUND\u201d\u6216\u201cDECIMAL\u201d\u51fd\u6578\u3002<\/p>\n<pre><code>-- Oracle\nSELECT ROUND(123.456, 2) AS rounded_value FROM dual;\n\n-- DB2\nSELECT ROUND(123.456, 2) AS rounded_value FROM sysibm.sysdummy1;\nSELECT DECIMAL(123.456, 5, 2) AS decimal_value FROM sysibm.sysdummy1;\n<\/code><\/pre>\n<h2 id=\"4-%e5%b0%8f%e7%b5%90-BJVKkGKMoo\">4. \u5c0f\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0cDB2\u548cOracle\u5728\u51fd\u6578\u7684\u4f7f\u7528\u4e0a\u5b58\u5728\u4e00\u4e9b\u986f\u8457\u7684\u5dee\u7570\u3002\u958b\u767c\u8005\u5728\u9078\u64c7\u6578\u64da\u5eab\u7cfb\u7d71\u6642\uff0c\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u548c\u4f7f\u7528\u7fd2\u6163\u4f86\u9078\u64c7\u5408\u9069\u7684\u7cfb\u7d71\u3002\u4e86\u89e3\u9019\u4e9b\u5dee\u7570\u4e0d\u50c5\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u6709\u95dc\u6578\u64da\u5eab\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u7372\u53d6\u66f4\u591a\u6709\u95dc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c\u5176\u4ed6\u670d\u52d9\u7684\u8a73\u7d30\u8cc7\u6599\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u8207Oracle\u4e4b\u9593\u7684\u5e38\u7528\u51fd\u6578\u5dee\u7570\uff0c\u4e86\u89e3\u5404\u81ea\u7684\u7279\u9ede\u8207\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u5eab\u64cd\u4f5c\u6548\u7387\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-60433","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60433","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=60433"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60433\/revisions"}],"predecessor-version":[{"id":60434,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60433\/revisions\/60434"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60433"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60433"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60433"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}