{"id":60885,"date":"2024-10-13T06:38:16","date_gmt":"2024-10-12T22:38:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60885\/"},"modified":"2024-10-13T06:38:16","modified_gmt":"2024-10-12T22:38:16","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e5%b0%8f%e6%95%b8%ef%bc%8c%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-db2%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60885\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578\uff0c\u5feb\u901f\u9ad8\u6548\u5be6\u73fe\u65b9\u6cd5 (db2\u6578\u64da\u5eab\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578)"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e5%b0%8f%e6%95%b8%ef%bc%8c%e5%bf%ab%e9%80%9f%e9%ab%98%e6%95%88%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95-AHKBGkVJtv\">DB2\u6578\u64da\u5eab\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578\uff0c\u5feb\u901f\u9ad8\u6548\u5be6\u73fe\u65b9\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7279\u5225\u662f\u5728DB2\u6578\u64da\u5eab\u4e2d\uff0c\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u6578\uff08Decimal\uff09\u985e\u578b\u7684\u64cd\u4f5c\uff0c\u5c0d\u65bc\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u8a08\u7b97\u7684\u6709\u6548\u6027\u81f3\u95dc\u91cd\u8981\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728DB2\u4e2d\u5982\u4f55\u9ad8\u6548\u5730\u5be6\u73fe\u5b57\u7b26\u4e32\u5230\u5c0f\u6578\u7684\u8f49\u63db\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e5%b0%8f%e6%95%b8-AHKBGkVJtv\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578<\/h2>\n<p>\u5728\u6578\u64da\u8655\u7406\u904e\u7a0b\u4e2d\uff0c\u7d93\u5e38\u6703\u9047\u5230\u6578\u64da\u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u5b58\u5132\u7684\u60c5\u6cc1\u3002\u9019\u53ef\u80fd\u662f\u7531\u65bc\u6578\u64da\u5c0e\u5165\u3001\u7528\u6236\u8f38\u5165\u6216\u5176\u4ed6\u539f\u56e0\u3002\u5c07\u9019\u4e9b\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u6578\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u6578\u64da\u66f4\u6613\u65bc\u9032\u884c\u6578\u5b78\u904b\u7b97\u548c\u5206\u6790\u3002\u4f8b\u5982\uff0c\u5728\u8ca1\u52d9\u5831\u8868\u4e2d\uff0c\u91d1\u984d\u901a\u5e38\u4ee5\u5b57\u7b26\u4e32\u5f62\u5f0f\u5b58\u5132\uff0c\u70ba\u4e86\u9032\u884c\u8a08\u7b97\uff0c\u5fc5\u9808\u5c07\u5176\u8f49\u63db\u70ba\u5c0f\u6578\u3002<\/p>\n<h2 id=\"db2%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-AHKBGkVJtv\">DB2\u4e2d\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u6578\u64da\u985e\u578b\u5305\u62ec\u6574\u6578\u3001\u6d6e\u9ede\u6578\u3001\u5c0f\u6578\u7b49\u3002\u5c0f\u6578\u985e\u578b\uff08Decimal\uff09\u7279\u5225\u9069\u5408\u7528\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u7684\u8a08\u7b97\uff0c\u5982\u8ca1\u52d9\u6578\u64da\u3002DB2\u652f\u6301\u7684Decimal\u985e\u578b\u53ef\u4ee5\u6307\u5b9a\u7cbe\u5ea6\u548c\u5c0f\u6578\u4f4d\u6578\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u8655\u7406\u91d1\u984d\u7b49\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e5%ad%97%e7%ac%a6%e4%b8%b2%e8%bd%89%e5%b0%8f%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-AHKBGkVJtv\">\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528CAST\u51fd\u6578\u6216DECIMAL\u51fd\u6578\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u6578\u3002\u4ee5\u4e0b\u662f\u9019\u5169\u7a2e\u65b9\u6cd5\u7684\u8a73\u7d30\u8aaa\u660e\uff1a<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8cast%e5%87%bd%e6%95%b8-AHKBGkVJtv\">\u4f7f\u7528CAST\u51fd\u6578<\/h3>\n<pre><code>SELECT CAST('123.45' AS DECIMAL(10, 2)) AS converted_value FROM SYSIBM.SYSDUMMY1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5c07\u5b57\u7b26\u4e32&#8217;123.45&#8217;\u8f49\u63db\u70ba\u5c0f\u6578\u985e\u578b\uff0c\u4e26\u6307\u5b9a\u4e86\u7cbe\u5ea6\u70ba10\uff0c\u5c0f\u6578\u4f4d\u6578\u70ba2\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u8f49\u63db\u5f8c\u7684\u6578\u64da\u7b26\u5408\u9810\u671f\u7684\u683c\u5f0f\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8decimal%e5%87%bd%e6%95%b8-AHKBGkVJtv\">\u4f7f\u7528DECIMAL\u51fd\u6578<\/h3>\n<pre><code>SELECT DECIMAL('123.45', 10, 2) AS converted_value FROM SYSIBM.SYSDUMMY1;<\/code><\/pre>\n<p>\u9019\u500b\u4f8b\u5b50\u8207\u4e0a\u9762\u7684CAST\u51fd\u6578\u985e\u4f3c\uff0c\u4f7f\u7528DECIMAL\u51fd\u6578\u4e5f\u80fd\u9054\u5230\u76f8\u540c\u7684\u6548\u679c\u3002\u9078\u64c7\u54ea\u7a2e\u65b9\u6cd5\u4e3b\u8981\u53d6\u6c7a\u65bc\u500b\u4eba\u559c\u597d\u548c\u5177\u9ad4\u60c5\u6cc1\u3002<\/p>\n<h2 id=\"%e8%99%95%e7%90%86%e8%bd%89%e6%8f%9b%e9%81%8e%e7%a8%8b%e4%b8%ad%e7%9a%84%e9%8c%af%e8%aa%a4-AHKBGkVJtv\">\u8655\u7406\u8f49\u63db\u904e\u7a0b\u4e2d\u7684\u932f\u8aa4<\/h2>\n<p>\u5728\u9032\u884c\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578\u7684\u904e\u7a0b\u4e2d\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u932f\u8aa4\uff0c\u4f8b\u5982\u683c\u5f0f\u4e0d\u6b63\u78ba\u6216\u8d85\u51fa\u7bc4\u570d\u3002\u70ba\u4e86\u907f\u514d\u9019\u4e9b\u554f\u984c\uff0c\u53ef\u4ee5\u4f7f\u7528TRY_CAST\u6216TRY_DECIMAL\u51fd\u6578\uff0c\u9019\u4e9b\u51fd\u6578\u5728\u8f49\u63db\u5931\u6557\u6642\u4e0d\u6703\u5f15\u767c\u932f\u8aa4\uff0c\u800c\u662f\u8fd4\u56deNULL\u3002<\/p>\n<pre><code>SELECT TRY_CAST('abc' AS DECIMAL(10, 2)) AS converted_value FROM SYSIBM.SYSDUMMY1;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7531\u65bc&#8217;abc&#8217;\u7121\u6cd5\u8f49\u63db\u70ba\u5c0f\u6578\uff0c\u7d50\u679c\u5c07\u8fd4\u56deNULL\uff0c\u800c\u4e0d\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-AHKBGkVJtv\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5b57\u7b26\u4e32\u8f49\u5c0f\u6578\u7684\u6027\u80fd\u53ef\u80fd\u6210\u70ba\u4e00\u500b\u74f6\u9838\u3002\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u6578\u64da\u683c\u5f0f\u6b63\u78ba\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8f49\u63db\u5931\u6557\u3002<\/li>\n<li>\u5728\u9032\u884c\u6279\u91cf\u64cd\u4f5c\u6642\uff0c\u4f7f\u7528\u6279\u8655\u7406\u8a9e\u53e5\u4f86\u6e1b\u5c11\u4e0a\u4e0b\u6587\u5207\u63db\u7684\u958b\u92b7\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u5927\u91cf\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-AHKBGkVJtv\">\u7e3d\u7d50<\/h2>\n<p>\u5728DB2\u6578\u64da\u5eab\u4e2d\uff0c\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u6578\u662f\u4e00\u500b\u5e38\u898b\u4e14\u91cd\u8981\u7684\u64cd\u4f5c\u3002\u901a\u904e\u4f7f\u7528CAST\u6216DECIMAL\u51fd\u6578\uff0c\u4e26\u8003\u616e\u5230\u932f\u8aa4\u8655\u7406\u548c\u6027\u80fd\u512a\u5316\uff0c\u53ef\u4ee5\u9ad8\u6548\u5730\u5be6\u73fe\u9019\u4e00\u9700\u6c42\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u7684\u61c9\u7528\u5834\u666f\uff0c\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u8f49\u63db\u5c07\u5927\u5927\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6e96\u78ba\u6027\u548c\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e<em><a href=\"https:\/\/server.hk\">VPS<\/a><\/em>\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u6578\u64da\u5eab\u4e2d\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u6578\u7684\u5feb\u901f\u9ad8\u6548\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u958b\u767c\u6d41\u7a0b\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-60885","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60885","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=60885"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60885\/revisions"}],"predecessor-version":[{"id":60886,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60885\/revisions\/60886"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60885"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60885"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}