{"id":5786,"date":"2024-11-14T12:16:14","date_gmt":"2024-11-14T04:16:14","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5786\/"},"modified":"2024-11-14T12:16:14","modified_gmt":"2024-11-14T04:16:14","slug":"mysql%e5%8a%a0%e5%87%8f%e6%b3%95%e6%80%8e%e4%b9%88%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5786\/","title":{"rendered":"mysql\u52a0\u51cf\u6cd5\u600e\u4e48\u7528"},"content":{"rendered":"<blockquote><p>\n  mysql\u4e2d\u52a0\u51cf\u6cd5\u53ef\u4f7f\u7528\u8fd0\u7b97\u7b26+\u548c-\u3002\u6267\u884c\u52a0\u51cf\u6cd5\u53ea\u9700\u5c06\u6570\u5b57\u6216\u5217\u8fde\u63a5\u8d77\u6765\u5e76\u4f7f\u7528\u9002\u5f53\u7684\u8fd0\u7b97\u7b26\uff0c\u4e5f\u53ef\u4f7f\u7528\u522b\u540d\u4f7f\u7ed3\u679c\u66f4\u5bb9\u6613\u7406\u89e3\u3002\u6b64\u5916\uff0cmysql\u8fd8\u63d0\u4f9bround()\u3001floor()\u548cceil()\u7b49\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u7684\u52a0\u51cf\u6cd5\u64cd\u4f5c\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202406\/02\/2024060201280781422.jpg\" class=\"aligncenter\" title=\"mysql\u52a0\u51cf\u6cd5\u600e\u4e48\u7528\u63d2\u56fe\" alt=\"mysql\u52a0\u51cf\u6cd5\u600e\u4e48\u7528\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL \u4e2d\u52a0\u51cf\u6cd5\u7684\u4f7f\u7528\u65b9\u6cd5<\/strong><\/p>\n<p>\u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u6570\u5b66\u8fd0\u7b97\u7b26\u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c\u3002\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li> <strong>+<\/strong>\uff1a\u52a0\u6cd5<\/li>\n<li> <strong>&#8211;<\/strong>\uff1a\u51cf\u6cd5<\/li>\n<\/ul>\n<p><strong>\u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c<\/strong><\/p>\n<p>\u8981\u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c\uff0c\u53ea\u9700\u5c06\u6570\u5b57\u6216\u5217\u8fde\u63a5\u8d77\u6765\uff0c\u5e76\u4f7f\u7528\u9002\u5f53\u7684\u8fd0\u7b97\u7b26\u3002\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>SELECT 5 + 3; -&gt; \u8fd4\u56de 8<\/li>\n<li>SELECT column1 &#8211; column2; -&gt; \u8fd4\u56de column1 \u51cf\u53bb column2 \u7684\u503c<\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\u522b\u540d<\/strong><\/p>\n<p>\u5bf9\u4e8e\u590d\u6742\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528\u522b\u540d\u6765\u4f7f\u7ed3\u679c\u66f4\u6613\u4e8e\u7406\u89e3\u3002\u522b\u540d\u662f\u4e00\u79cd\u7ed9\u8ba1\u7b97\u7ed3\u679c\u8d77\u7684\u540d\u79f0\uff0c\u4f7f\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5f15\u7528\u8be5\u7ed3\u679c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>SELECT column1 + column2 AS sum;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u67e5\u8be2\u4f1a\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a &#8220;sum&#8221; \u7684\u522b\u540d\uff0c\u7528\u4e8e\u8868\u793a column1 \u548c column2 \u7684\u603b\u548c\u3002<\/p>\n<p><strong>\u4f7f\u7528\u51fd\u6570<\/strong><\/p>\n<p>MySQL \u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u7684\u52a0\u51cf\u6cd5\u64cd\u4f5c\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>ROUND()\uff1a\u56db\u820d\u4e94\u5165\u6570\u5b57<\/li>\n<li>FLOOR()\uff1a\u5411\u4e0b\u820d\u5165\u6570\u5b57<\/li>\n<li>CEIL()\uff1a\u5411\u4e0a\u820d\u5165\u6570\u5b57<\/li>\n<\/ul>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>SELECT ROUND(column1 + column2, 2);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u6b64\u67e5\u8be2\u4f1a\u5c06 column1 \u548c column2 \u7684\u603b\u548c\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u52a0\u51cf\u6cd5\u600e\u4e48\u7528\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql\u4e2d\u52a0\u51cf\u6cd5\u53ef\u4f7f\u7528\u8fd0\u7b97\u7b26+\u548c-\u3002\u6267\u884c\u52a0\u51cf\u6cd5\u53ea\u9700\u5c06\u6570\u5b57\u6216\u5217\u8fde\u63a5\u8d77\u6765\u5e76\u4f7f\u7528\u9002\u5f53\u7684\u8fd0\u7b97\u7b26\uff0c\u4e5f\u53ef\u4f7f\u7528\u522b\u540d\u4f7f\u7ed3\u679c\u66f4\u5bb9\u6613\u7406\u89e3\u3002\u6b64\u5916\uff0cmysql\u8fd8\u63d0\u4f9bround()\u3001floor()\u548cceil()\u7b49\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u7684\u52a0\u51cf\u6cd5\u64cd\u4f5c\u3002 MySQL \u4e2d\u52a0\u51cf\u6cd5\u7684\u4f7f\u7528\u65b9\u6cd5 \u5728 MySQL \u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528\u6570\u5b66\u8fd0\u7b97\u7b26\u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c\u3002\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u5305\u62ec\uff1a +\uff1a\u52a0\u6cd5 &#8211;\uff1a\u51cf\u6cd5 \u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c \u8981\u6267\u884c\u52a0\u51cf\u6cd5\u64cd\u4f5c\uff0c\u53ea\u9700\u5c06\u6570\u5b57\u6216\u5217\u8fde\u63a5\u8d77\u6765\uff0c\u5e76\u4f7f\u7528\u9002\u5f53\u7684\u8fd0\u7b97\u7b26\u3002\u4f8b\u5982\uff1a SELECT 5 + 3; -&gt; \u8fd4\u56de 8 SELECT column1 &#8211; column2; -&gt; \u8fd4\u56de column1 \u51cf\u53bb column2 \u7684\u503c \u4f7f\u7528\u522b\u540d \u5bf9\u4e8e\u590d\u6742\u7684\u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528\u522b\u540d\u6765\u4f7f\u7ed3\u679c\u66f4\u6613\u4e8e\u7406\u89e3\u3002\u522b\u540d\u662f\u4e00\u79cd\u7ed9\u8ba1\u7b97\u7ed3\u679c\u8d77\u7684\u540d\u79f0\uff0c\u4f7f\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5f15\u7528\u8be5\u7ed3\u679c\u3002\u4f8b\u5982\uff1a SELECT column1 + column2 AS sum; \u767b\u5f55\u540e\u590d\u5236 \u6b64\u67e5\u8be2\u4f1a\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a &#8220;sum&#8221; \u7684\u522b\u540d\uff0c\u7528\u4e8e\u8868\u793a column1 \u548c column2 \u7684\u603b\u548c\u3002 \u4f7f\u7528\u51fd\u6570 MySQL \u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e9b\u51fd\u6570\uff0c\u7528\u4e8e\u6267\u884c\u7279\u5b9a\u7684\u52a0\u51cf\u6cd5\u64cd\u4f5c\uff0c\u4f8b\u5982\uff1a ROUND()\uff1a\u56db\u820d\u4e94\u5165\u6570\u5b57 FLOOR()\uff1a\u5411\u4e0b\u820d\u5165\u6570\u5b57 CEIL()\uff1a\u5411\u4e0a\u820d\u5165\u6570\u5b57 \u4f8b\u5982\uff1a SELECT ROUND(column1 + column2, 2); [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5786","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5786"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5786\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5786"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5786"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5786"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}