{"id":153003,"date":"2024-11-02T03:49:20","date_gmt":"2024-11-01T19:49:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/153003\/"},"modified":"2024-11-02T03:49:21","modified_gmt":"2024-11-01T19:49:21","slug":"%e5%a4%84%e7%90%86%e5%b0%8f%e6%95%b8%e9%bb%9e%e4%bd%8d%e6%95%b8%e7%9a%84-oracle-%e5%87%bd%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/153003\/","title":{"rendered":"\u5904\u7406\u5c0f\u6578\u9ede\u4f4d\u6578\u7684 Oracle \u51fd\u6578"},"content":{"rendered":"<h1 id=\"%e5%a4%84%e7%90%86%e5%b0%8f%e6%95%b0%e7%82%b9%e4%bd%8d%e6%95%b0%e7%9a%84-oracle-%e5%87%bd%e6%95%b0-CBJlIwGbra\">\u5904\u7406\u5c0f\u6570\u70b9\u4f4d\u6570\u7684 Oracle \u51fd\u6570<\/h1>\n<p>\u5728\u6570\u636e\u5e93\u7ba1\u7406\u4e2d\uff0c\u5904\u7406\u5c0f\u6570\u70b9\u4f4d\u6570\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u8d22\u52a1\u3001\u7edf\u8ba1\u548c\u79d1\u5b66\u8ba1\u7b97\u7b49\u9886\u57df\u3002Oracle \u6570\u636e\u5e93\u63d0\u4f9b\u4e86\u591a\u79cd\u51fd\u6570\u6765\u5904\u7406\u5c0f\u6570\u70b9\u4f4d\u6570\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c06\u63a2\u8ba8\u4e00\u4e9b\u5e38\u7528\u7684 Oracle \u51fd\u6570\uff0c\u5e2e\u52a9\u7528\u6237\u66f4\u597d\u5730\u7ba1\u7406\u5c0f\u6570\u70b9\u4f4d\u6570\u3002<\/p>\n<h2 id=\"1-round-%e5%87%bd%e6%95%b0-CBJlIwGbra\">1. ROUND \u51fd\u6570<\/h2>\n<p>ROUND \u51fd\u6570\u7528\u4e8e\u5c06\u6570\u5b57\u56db\u820d\u4e94\u5165\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u5176\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ROUND(number, decimal_places)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>number<\/code> \u662f\u8981\u5904\u7406\u7684\u6570\u5b57\uff0c<code>decimal_places<\/code> \u662f\u8981\u4fdd\u7559\u7684\u5c0f\u6570\u4f4d\u6570\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT ROUND(123.4567, 2) AS rounded_value FROM dual;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8be2\u5c06\u8fd4\u56de <code>123.46<\/code>\uff0c\u56e0\u4e3a\u5b83\u5c06\u6570\u5b57\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n<h2 id=\"2-trunc-%e5%87%bd%e6%95%b0-CBJlIwGbra\">2. TRUNC \u51fd\u6570<\/h2>\n<p>TRUNC \u51fd\u6570\u7528\u4e8e\u622a\u65ad\u6570\u5b57\u5230\u6307\u5b9a\u7684\u5c0f\u6570\u4f4d\u6570\uff0c\u800c\u4e0d\u662f\u8fdb\u884c\u56db\u820d\u4e94\u5165\u3002\u5176\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TRUNC(number, decimal_places)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT TRUNC(123.4567, 2) AS truncated_value FROM dual;<\/code><\/pre>\n<p>\u6b64\u67e5\u8be2\u5c06\u8fd4\u56de <code>123.45<\/code>\uff0c\u56e0\u4e3a\u5b83\u76f4\u63a5\u622a\u65ad\u4e86\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n<h2 id=\"3-ceil-%e5%92%8c-floor-%e5%87%bd%e6%95%b0-CBJlIwGbra\">3. CEIL \u548c FLOOR \u51fd\u6570<\/h2>\n<p>CEIL \u548c FLOOR \u51fd\u6570\u5206\u522b\u7528\u4e8e\u5411\u4e0a\u548c\u5411\u4e0b\u53d6\u6574\u3002CEIL \u51fd\u6570\u8fd4\u56de\u5927\u4e8e\u6216\u7b49\u4e8e\u6307\u5b9a\u6570\u5b57\u7684\u6700\u5c0f\u6574\u6570\uff0c\u800c FLOOR \u51fd\u6570\u8fd4\u56de\u5c0f\u4e8e\u6216\u7b49\u4e8e\u6307\u5b9a\u6570\u5b57\u7684\u6700\u5927\u6574\u6570\u3002\u5b83\u4eec\u7684\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CEIL(number)<\/code><\/pre>\n<pre><code>FLOOR(number)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT CEIL(123.456) AS ceil_value, FLOOR(123.456) AS floor_value FROM dual;<\/code><\/pre>\n<p>\u6b64\u67e5\u8be2\u5c06\u8fd4\u56de <code>ceil_value<\/code> \u4e3a <code>124<\/code>\uff0c\u800c <code>floor_value<\/code> \u4e3a <code>123<\/code>\u3002<\/p>\n<h2 id=\"4-to_number-%e5%87%bd%e6%95%b0-CBJlIwGbra\">4. TO_NUMBER \u51fd\u6570<\/h2>\n<p>TO_NUMBER \u51fd\u6570\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\uff0c\u5e76\u53ef\u4ee5\u6307\u5b9a\u683c\u5f0f\u6a21\u578b\u4ee5\u63a7\u5236\u5c0f\u6570\u70b9\u4f4d\u6570\u3002\u5176\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TO_NUMBER(char, format_model)<\/code><\/pre>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT TO_NUMBER('123.456', '999.99') AS number_value FROM dual;<\/code><\/pre>\n<p>\u6b64\u67e5\u8be2\u5c06\u8fd4\u56de <code>123.46<\/code>\uff0c\u56e0\u4e3a\u5b83\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u6570\u5b57\u5e76\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-CBJlIwGbra\">5. \u4f7f\u7528\u793a\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7efc\u5408\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u4e00\u4e2a\u67e5\u8be2\u4e2d\u4f7f\u7528\u4e0a\u8ff0\u51fd\u6570\uff1a<\/p>\n<pre><code>SELECT \n    ROUND(123.4567, 2) AS rounded_value,\n    TRUNC(123.4567, 2) AS truncated_value,\n    CEIL(123.456) AS ceil_value,\n    FLOOR(123.456) AS floor_value,\n    TO_NUMBER('123.456', '999.99') AS converted_value\nFROM dual;<\/code><\/pre>\n<p>\u8be5\u67e5\u8be2\u5c06\u8fd4\u56de\u6240\u6709\u5904\u7406\u540e\u7684\u503c\uff0c\u4fbf\u4e8e\u7528\u6237\u8fdb\u884c\u6bd4\u8f83\u548c\u5206\u6790\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-CBJlIwGbra\">\u603b\u7ed3<\/h2>\n<p>\u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u5904\u7406\u5c0f\u6570\u70b9\u4f4d\u6570\u7684\u51fd\u6570\u5982 ROUND\u3001TRUNC\u3001CEIL\u3001FLOOR \u548c TO_NUMBER \u63d0\u4f9b\u4e86\u7075\u6d3b\u7684\u9009\u9879\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u901a\u8fc7\u5408\u7406\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\uff0c\u7528\u6237\u53ef\u4ee5\u786e\u4fdd\u6570\u636e\u7684\u51c6\u786e\u6027\u548c\u4e00\u81f4\u6027\u3002\u5bf9\u4e8e\u9700\u8981\u9ad8\u6548\u7ba1\u7406\u6570\u636e\u7684\u7528\u6237\uff0c\u9009\u62e9\u5408\u9002\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u51b3\u65b9\u6848\u4e5f\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u4e86\u89e3\u8fd9\u4e9b\u51fd\u6570\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5c06\u6709\u52a9\u4e8e\u63d0\u5347\u6570\u636e\u5904\u7406\u7684\u6548\u7387\u548c\u51c6\u786e\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 Oracle \u51fd\u6578\u4ee5\u6709\u6548\u8655\u7406\u5c0f\u6578\u9ede\u4f4d\u6578\uff0c\u63d0\u5347\u6578\u64da\u6e96\u78ba\u6027\u548c\u8a08\u7b97\u6548\u7387\uff0c\u6eff\u8db3\u5404\u7a2e\u696d\u52d9\u9700\u6c42\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-153003","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153003","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=153003"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153003\/revisions"}],"predecessor-version":[{"id":153004,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153003\/revisions\/153004"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=153003"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=153003"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=153003"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}