{"id":160801,"date":"2024-11-04T01:07:25","date_gmt":"2024-11-03T17:07:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160801\/"},"modified":"2024-11-04T01:07:26","modified_gmt":"2024-11-03T17:07:26","slug":"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql-%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160801\/","title":{"rendered":"\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL \u7b97\u8853\u904b\u7b97\u7b26"},"content":{"rendered":"<h1 id=\"%e8%b3%87%e6%96%99%e5%ba%ab%e6%95%99%e7%a8%8b%ef%bc%9amysql-%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">\u8cc7\u6599\u5eab\u6559\u7a0b\uff1aMySQL \u7b97\u8853\u904b\u7b97\u7b26<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u7ba1\u7406\u8cc7\u6599\uff0c\u5176\u4e2d\u7b97\u8853\u904b\u7b97\u7b26\u662f\u6700\u57fa\u672c\u7684\u529f\u80fd\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MySQL \u4e2d\u7684\u7b97\u8853\u904b\u7b97\u7b26\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u4f7f\u7528\u60c5\u5883\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97%e7%ac%a6%ef%bc%9f-yvfxpbrqiY\">\u4ec0\u9ebc\u662f\u7b97\u8853\u904b\u7b97\u7b26\uff1f<\/h2>\n<p>\u7b97\u8853\u904b\u7b97\u7b26\u662f\u7528\u65bc\u57f7\u884c\u6578\u5b78\u8a08\u7b97\u7684\u7b26\u865f\u3002\u5728 MySQL \u4e2d\uff0c\u5e38\u898b\u7684\u7b97\u8853\u904b\u7b97\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>+<\/code>\uff1a\u52a0\u6cd5\u904b\u7b97\u7b26<\/li>\n<li><code>-<\/code>\uff1a\u6e1b\u6cd5\u904b\u7b97\u7b26<\/li>\n<li><code>*<\/code>\uff1a\u4e58\u6cd5\u904b\u7b97\u7b26<\/li>\n<li><code>\/<\/code>\uff1a\u9664\u6cd5\u904b\u7b97\u7b26<\/li>\n<li><code>%<\/code>\uff1a\u53d6\u9918\u904b\u7b97\u7b26<\/li>\n<\/ul>\n<h2 id=\"%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97%e7%ac%a6%e7%9a%84%e4%bd%bf%e7%94%a8-yvfxpbrqiY\">\u7b97\u8853\u904b\u7b97\u7b26\u7684\u4f7f\u7528<\/h2>\n<p>\u5728 MySQL \u4e2d\uff0c\u7b97\u8853\u904b\u7b97\u7b26\u53ef\u4ee5\u7528\u65bc\u6578\u503c\u8a08\u7b97\uff0c\u4e26\u4e14\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u76f4\u63a5\u4f7f\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"1-%e5%8a%a0%e6%b3%95%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">1. \u52a0\u6cd5\u904b\u7b97\u7b26<\/h3>\n<pre><code>SELECT 10 + 5 AS result;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 15\uff0c\u56e0\u70ba\u5b83\u5c07 10 \u548c 5 \u76f8\u52a0\u3002<\/p>\n<h3 id=\"2-%e6%b8%9b%e6%b3%95%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">2. \u6e1b\u6cd5\u904b\u7b97\u7b26<\/h3>\n<pre><code>SELECT 10 - 5 AS result;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 5\uff0c\u56e0\u70ba\u5b83\u5c07 10 \u6e1b\u53bb 5\u3002<\/p>\n<h3 id=\"3-%e4%b9%98%e6%b3%95%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">3. \u4e58\u6cd5\u904b\u7b97\u7b26<\/h3>\n<pre><code>SELECT 10 * 5 AS result;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 50\uff0c\u56e0\u70ba\u5b83\u5c07 10 \u548c 5 \u76f8\u4e58\u3002<\/p>\n<h3 id=\"4-%e9%99%a4%e6%b3%95%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">4. \u9664\u6cd5\u904b\u7b97\u7b26<\/h3>\n<pre><code>SELECT 10 \/ 5 AS result;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 2\uff0c\u56e0\u70ba\u5b83\u5c07 10 \u9664\u4ee5 5\u3002<\/p>\n<h3 id=\"5-%e5%8f%96%e9%a4%98%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">5. \u53d6\u9918\u904b\u7b97\u7b26<\/h3>\n<pre><code>SELECT 10 % 3 AS result;<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de 1\uff0c\u56e0\u70ba 10 \u9664\u4ee5 3 \u7684\u9918\u6578\u662f 1\u3002<\/p>\n<h2 id=\"%e5%9c%a8%e6%9f%a5%e8%a9%a2%e4%b8%ad%e4%bd%bf%e7%94%a8%e7%ae%97%e8%a1%93%e9%81%8b%e7%ae%97%e7%ac%a6-yvfxpbrqiY\">\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7b97\u8853\u904b\u7b97\u7b26<\/h2>\n<p>\u7b97\u8853\u904b\u7b97\u7b26\u4e0d\u50c5\u53ef\u4ee5\u7528\u65bc\u975c\u614b\u6578\u503c\uff0c\u9084\u53ef\u4ee5\u7528\u65bc\u8cc7\u6599\u8868\u4e2d\u7684\u6b04\u4f4d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7b97\u8853\u904b\u7b97\u7b26\u4f86\u8a08\u7b97\u8cc7\u6599\u8868\u4e2d\u7684\u6578\u503c\uff1a<\/p>\n<pre><code>SELECT price, quantity, (price * quantity) AS total_price\nFROM products;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u6211\u5011\u5f9e\u540d\u70ba <code>products<\/code> \u7684\u8cc7\u6599\u8868\u4e2d\u9078\u53d6 <code>price<\/code> \u548c <code>quantity<\/code> \u6b04\u4f4d\uff0c\u4e26\u8a08\u7b97\u6bcf\u500b\u7522\u54c1\u7684\u7e3d\u50f9\u683c\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-yvfxpbrqiY\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u7b97\u8853\u904b\u7b97\u7b26\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u9664\u6cd5\u904b\u7b97\u7b26\u5728\u9664\u4ee5\u96f6\u6642\u6703\u7522\u751f\u932f\u8aa4\uff0c\u56e0\u6b64\u5728\u9032\u884c\u9664\u6cd5\u8a08\u7b97\u6642\u61c9\u8a72\u6aa2\u67e5\u9664\u6578\u662f\u5426\u70ba\u96f6\u3002<\/li>\n<li>\u5728\u9032\u884c\u8a08\u7b97\u6642\uff0cMySQL \u6703\u81ea\u52d5\u5c07\u6574\u6578\u8f49\u63db\u70ba\u6d6e\u9ede\u6578\uff0c\u4ee5\u907f\u514d\u6574\u6578\u9664\u6cd5\u7684\u554f\u984c\u3002<\/li>\n<li>\u4f7f\u7528\u7b97\u8853\u904b\u7b97\u7b26\u6642\uff0c\u61c9\u6ce8\u610f\u904b\u7b97\u7684\u512a\u5148\u9806\u5e8f\uff0c\u4f7f\u7528\u62ec\u865f\u53ef\u4ee5\u660e\u78ba\u6307\u5b9a\u8a08\u7b97\u7684\u9806\u5e8f\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-yvfxpbrqiY\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u7684\u7b97\u8853\u904b\u7b97\u7b26\u662f\u9032\u884c\u6578\u5b78\u8a08\u7b97\u7684\u91cd\u8981\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5728\u67e5\u8a62\u4e2d\u9032\u884c\u5404\u7a2e\u8a08\u7b97\u3002\u7121\u8ad6\u662f\u7c21\u55ae\u7684\u52a0\u6e1b\u4e58\u9664\uff0c\u9084\u662f\u8907\u96dc\u7684\u8a08\u7b97\uff0c\u638c\u63e1\u9019\u4e9b\u904b\u7b97\u7b26\u90fd\u80fd\u63d0\u9ad8\u8cc7\u6599\u8655\u7406\u7684\u6548\u7387\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6709\u66f4\u6df1\u5165\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u4f86\u642d\u5efa\u60a8\u7684\u8cc7\u6599\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 MySQL \u4e2d\u7684\u7b97\u8853\u904b\u7b97\u7b26\uff0c\u5b78\u7fd2\u5982\u4f55\u5728\u8cc7\u6599\u5eab\u67e5\u8a62\u4e2d\u9032\u884c\u6578\u5b78\u8a08\u7b97\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-160801","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160801","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=160801"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160801\/revisions"}],"predecessor-version":[{"id":160802,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160801\/revisions\/160802"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160801"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160801"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160801"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}