{"id":93958,"date":"2024-10-19T18:21:20","date_gmt":"2024-10-19T10:21:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93958\/"},"modified":"2024-10-19T18:21:20","modified_gmt":"2024-10-19T10:21:20","slug":"oracle-number%e9%a1%9e%e5%9e%8b%e6%9f%a5%e8%a9%a2%e7%b2%be%e5%ba%a6%e4%b8%9f%e5%a4%b1%e7%9a%84%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93958\/","title":{"rendered":"Oracle number\u985e\u578b\u67e5\u8a62\u7cbe\u5ea6\u4e1f\u5931\u7684\u89e3\u6c7a\u65b9\u6cd5"},"content":{"rendered":"<h1 id=\"oracle-number%e9%a1%9e%e5%9e%8b%e6%9f%a5%e8%a9%a2%e7%b2%be%e5%ba%a6%e4%b8%9f%e5%a4%b1%e7%9a%84%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%b3%95-mVJWZTxvFB\">Oracle Number\u985e\u578b\u67e5\u8a62\u7cbe\u5ea6\u4e1f\u5931\u7684\u89e3\u6c7a\u65b9\u6cd5<\/h1>\n<p>\u5728\u4f7f\u7528Oracle\u6578\u64da\u5eab\u6642\uff0c\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\u5c0d\u65bc\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u5b8c\u6574\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7279\u5225\u662f\u5c0d\u65bc\u6578\u5b57\u985e\u578b\u7684\u6578\u64da\uff0c\u7cbe\u5ea6\u7684\u4e1f\u5931\u53ef\u80fd\u6703\u5c0e\u81f4\u8a08\u7b97\u932f\u8aa4\u548c\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle\u4e2dNumber\u985e\u578b\u67e5\u8a62\u7cbe\u5ea6\u4e1f\u5931\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"oracle-number%e9%a1%9e%e5%9e%8b%e6%a6%82%e8%bf%b0-mVJWZTxvFB\">Oracle Number\u985e\u578b\u6982\u8ff0<\/h2>\n<p>Oracle\u7684Number\u6578\u64da\u985e\u578b\u662f\u4e00\u7a2e\u975e\u5e38\u9748\u6d3b\u7684\u6578\u64da\u985e\u578b\uff0c\u80fd\u5920\u5b58\u5132\u6574\u6578\u3001\u6d6e\u9ede\u6578\u4ee5\u53ca\u79d1\u5b78\u8a08\u6578\u6cd5\u8868\u793a\u7684\u6578\u5b57\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u70ba\uff1a<\/p>\n<pre><code>NUMBER(p,s)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>p<\/code>\u8868\u793a\u7cbe\u5ea6\uff08\u5373\u6578\u5b57\u7684\u7e3d\u4f4d\u6578\uff09\uff0c<code>s<\/code>\u8868\u793a\u5c0f\u6578\u4f4d\u6578\u3002\u82e5\u672a\u6307\u5b9a\uff0c\u5247\u9ed8\u8a8d\u70ba38\u4f4d\u7cbe\u5ea6\u548c0\u4f4d\u5c0f\u6578\u3002<\/p>\n<h2 id=\"%e7%b2%be%e5%ba%a6%e4%b8%9f%e5%a4%b1%e7%9a%84%e5%8e%9f%e5%9b%a0-mVJWZTxvFB\">\u7cbe\u5ea6\u4e1f\u5931\u7684\u539f\u56e0<\/h2>\n<p>\u5728\u67e5\u8a62\u6216\u8a08\u7b97\u904e\u7a0b\u4e2d\uff0c\u7cbe\u5ea6\u4e1f\u5931\u7684\u539f\u56e0\u4e3b\u8981\u6709\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u5c07\u4e0d\u540c\u6578\u64da\u985e\u578b\u7684\u6578\u64da\u9032\u884c\u904b\u7b97\u6642\uff0cOracle\u53ef\u80fd\u6703\u81ea\u52d5\u8f49\u63db\u6578\u64da\u985e\u578b\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u7cbe\u5ea6\u4e1f\u5931\u3002<\/li>\n<li><strong>\u56db\u6368\u4e94\u5165\u554f\u984c\uff1a<\/strong>\u5728\u9032\u884c\u6578\u5b78\u904b\u7b97\u6642\uff0cOracle\u53ef\u80fd\u6703\u6839\u64da\u8a2d\u5b9a\u7684\u7cbe\u5ea6\u9032\u884c\u56db\u6368\u4e94\u5165\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u7d50\u679c\u4e0d\u5982\u9810\u671f\u3002<\/li>\n<li><strong>\u67e5\u8a62\u8a9e\u53e5\u7684\u8a2d\u8a08\uff1a<\/strong>\u4e0d\u7576\u7684\u67e5\u8a62\u8a9e\u53e5\u8a2d\u8a08\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u7684\u622a\u65b7\u6216\u7cbe\u5ea6\u7684\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%b3%95-mVJWZTxvFB\">\u89e3\u6c7a\u65b9\u6cd5<\/h2>\n<p>\u70ba\u4e86\u907f\u514dOracle Number\u985e\u578b\u67e5\u8a62\u4e2d\u7684\u7cbe\u5ea6\u4e1f\u5931\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e6%98%8e%e7%a2%ba%e6%8c%87%e5%ae%9a%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-mVJWZTxvFB\">1. \u660e\u78ba\u6307\u5b9a\u6578\u64da\u985e\u578b<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6216\u63d2\u5165\u6578\u64da\u6642\uff0c\u61c9\u660e\u78ba\u6307\u5b9aNumber\u985e\u578b\u7684\u7cbe\u5ea6\u548c\u5c0f\u6578\u4f4d\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE TABLE example_table (\n    id NUMBER(10, 2),\n    amount NUMBER(15, 4)\n);<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u63d2\u5165\u6578\u64da\u6642\u4e0d\u6703\u56e0\u70ba\u9ed8\u8a8d\u503c\u800c\u5c0e\u81f4\u7cbe\u5ea6\u4e1f\u5931\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8cast%e5%87%bd%e6%95%b8-mVJWZTxvFB\">2. \u4f7f\u7528CAST\u51fd\u6578<\/h3>\n<p>\u5728\u9032\u884c\u6578\u64da\u904b\u7b97\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>CAST<\/code>\u51fd\u6578\u4f86\u5f37\u5236\u8f49\u63db\u6578\u64da\u985e\u578b\uff0c\u5f9e\u800c\u907f\u514d\u7cbe\u5ea6\u4e1f\u5931\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CAST(amount AS NUMBER(15, 4)) FROM example_table;<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u67e5\u8a62\u7d50\u679c\u7684\u7cbe\u5ea6\u7b26\u5408\u9810\u671f\u3002<\/p>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-mVJWZTxvFB\">3. \u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<p>\u5728\u8a2d\u8a08\u67e5\u8a62\u8a9e\u53e5\u6642\uff0c\u61c9\u4ed4\u7d30\u6aa2\u67e5\u904b\u7b97\u7b26\u548c\u51fd\u6578\u7684\u4f7f\u7528\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u8f49\u63db\u3002\u4f8b\u5982\uff0c\u4f7f\u7528<code>SUM<\/code>\u51fd\u6578\u6642\uff0c\u61c9\u78ba\u4fdd\u5176\u64cd\u4f5c\u7684\u6578\u64da\u985e\u578b\u4e00\u81f4\uff1a<\/p>\n<pre><code>SELECT SUM(CAST(amount AS NUMBER(15, 4))) FROM example_table;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8pl-sql%e9%80%b2%e8%a1%8c%e7%b2%be%e7%a2%ba%e8%a8%88%e7%ae%97-mVJWZTxvFB\">4. \u4f7f\u7528PL\/SQL\u9032\u884c\u7cbe\u78ba\u8a08\u7b97<\/h3>\n<p>\u5728\u9700\u8981\u9032\u884c\u8907\u96dc\u8a08\u7b97\u7684\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528PL\/SQL\u4f86\u9032\u884c\u7cbe\u78ba\u8a08\u7b97\uff0c\u9019\u6a23\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u6578\u64da\u7684\u7cbe\u5ea6\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>DECLARE\n    total_amount NUMBER(15, 4);\nBEGIN\n    SELECT SUM(amount) INTO total_amount FROM example_table;\n    DBMS_OUTPUT.PUT_LINE('Total Amount: ' || total_amount);\nEND;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mVJWZTxvFB\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u4e2d\uff0cNumber\u985e\u578b\u67e5\u8a62\u7684\u7cbe\u5ea6\u4e1f\u5931\u662f\u4e00\u500b\u5e38\u898b\u554f\u984c\uff0c\u4f46\u901a\u904e\u660e\u78ba\u6307\u5b9a\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528<code>CAST<\/code>\u51fd\u6578\u3001\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u4ee5\u53ca\u4f7f\u7528PL\/SQL\u9032\u884c\u8a08\u7b97\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u9019\u4e00\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u7cbe\u5ea6\u8a08\u7b97\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u548c\u67e5\u8a62\u8a2d\u8a08\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u6578\u64da\u5eab\u4e2d\u6578\u5b57\u985e\u578b\u67e5\u8a62\u7cbe\u5ea6\u4e1f\u5931\u7684\u89e3\u6c7a\u65b9\u6cd5\uff0c\u78ba\u4fdd\u6578\u64da\u6e96\u78ba\u6027\u8207\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-93958","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93958","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=93958"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93958\/revisions"}],"predecessor-version":[{"id":93959,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93958\/revisions\/93959"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}