{"id":37710,"date":"2023-07-09T11:08:22","date_gmt":"2023-07-09T03:08:22","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=37710"},"modified":"2023-07-31T00:35:33","modified_gmt":"2023-07-30T16:35:33","slug":"mysql-%e6%9f%a5%e8%af%a2%e5%ba%93%e5%ad%98%e7%bb%93%e5%ad%98%e6%95%b0%e9%87%8f%e8%af%ad%e5%8f%a5%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/37710.html","title":{"rendered":"MYSQL \u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u8bed\u53e5\u600e\u4e48\u5199"},"content":{"rendered":"<blockquote class=\"wp-block-quote\">\n<p>\u4f7f\u7528MYSQL\u8bed\u53e5\u6765\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u4e3b\u8981\u6db5\u76d6\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\uff1a1. \u7b80\u4ecb\u53ca\u521b\u5efa\u6570\u636e\u5e93\u548c\u8868\u683c\uff1b2. \u63d2\u5165\u6570\u636e\u53ca\u7406\u89e3\u6570\u636e\u7ed3\u6784\uff1b3. \u4f7f\u7528SELECT\u548cSUM\u8bed\u53e5\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u83b7\u53d6\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u3002<\/p>\n<\/blockquote>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" alt=\"\" class=\"wp-image-37711\" decoding=\"async\" height=\"300\" sizes=\"(max-width: 484px) 100vw, 484px\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-12.png?x-oss-process=image\/auto-orient,1\/format,webp\" srcset=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-12.png?x-oss-process=image\/auto-orient,1\/format,webp 484w, https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2023\/07\/\u6dfb\u52a0\u6807\u9898-12-300x186.png 300w\" width=\"484\"\/><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><strong>1<\/strong><strong>\u3001\u7b80\u4ecb\u53ca\u521b\u5efa\u6570\u636e\u5e93\u548c\u8868\u683c<\/strong><\/h2>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u6570\u636e\u5e93\u548c\u76f8\u5e94\u7684\u8868\u683c\u6765\u5b58\u50a8\u5e93\u5b58\u4fe1\u606f\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u53eb\u505a\u201cinventory\u201d\u7684\u6570\u636e\u5e93\uff0c\u91cc\u9762\u6709\u4e00\u4e2a\u201cstock\u201d\u8868\u683c\u6765\u8bb0\u5f55\u6bcf\u79cd\u5546\u54c1\u7684\u5e93\u5b58\u6570\u91cf\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684MYSQL\u8bed\u53e5\u6765\u521b\u5efa\uff1a<\/p>\n<p>\u201c`sql<\/p>\n<p>CREATE DATABASE inventory;<\/p>\n<p>USE inventory;<\/p>\n<p>CREATE TABLE stock(<\/p>\n<p>\u00a0 product_id INT PRIMARY KEY,<\/p>\n<p>\u00a0 product_name VARCHAR(100),<\/p>\n<p>\u00a0 quantity INT<\/p>\n<p>);<\/p>\n<p>\u201c`<\/p>\n<h2 class=\"wp-block-heading\"><strong>2<\/strong><strong>\u3001\u63d2\u5165\u6570\u636e\u53ca\u7406\u89e3\u6570\u636e\u7ed3\u6784<\/strong><\/h2>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u63d2\u5165\u4e00\u4e9b\u6570\u636e\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u6709\u4e09\u79cd\u5546\u54c1\uff0c\u7f16\u53f7\u5206\u522b\u662f1\u30012\u548c3\uff0c\u540d\u79f0\u5206\u522b\u662f\u201dA\u201d\u3001\u201dB\u201d\u548c\u201dC\u201d\uff0c\u6570\u91cf\u5206\u522b\u662f100\u3001200\u548c300\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bMYSQL\u8bed\u53e5\u63d2\u5165\u8fd9\u4e9b\u6570\u636e\uff1a<\/p>\n<p>\u201c`sql<\/p>\n<p>INSERT INTO stock(product_id, product_name, quantity) VALUES<\/p>\n<p>(1, \u201cA\u201d, 100),<\/p>\n<p>(2, \u201cB\u201d, 200),<\/p>\n<p>(3, \u201cC\u201d, 300);<\/p>\n<p>\u201c`<\/p>\n<p>\u6b64\u65f6\uff0c\u201dstock\u201d\u8868\u683c\u4e2d\u7684\u6570\u636e\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<p>| product_id | product_name | quantity |<\/p>\n<p>|\u2014\u2014\u2014\u2014|\u2014\u2014\u2014\u2014\u2013|\u2014\u2014\u2014-|<\/p>\n<p>| 1\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | A\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 100\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n<p>| 2\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | B\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 200\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n<p>| 3\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | C\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 300\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n<h2 class=\"wp-block-heading\"><strong>3<\/strong><strong>\u3001\u4f7f\u7528SELECT\u548cSUM\u8bed\u53e5\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf<\/strong><\/h2>\n<p>\u6700\u540e\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528SELECT\u548cSUM\u8bed\u53e5\u6765\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u4e86\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u60f3\u8981\u67e5\u8be2\u603b\u7684\u5e93\u5b58\u6570\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684MYSQL\u8bed\u53e5\uff1a<\/p>\n<p>\u201c`sql<\/p>\n<p>SELECT SUM(quantity) AS total_quantity FROM stock;<\/p>\n<p>\u201c`<\/p>\n<p>\u8fd0\u884c\u8fd9\u6761\u8bed\u53e5\u540e\uff0cMYSQL\u4f1a\u8fd4\u56de\u4e00\u4e2a\u7ed3\u679c\uff0c\u8868\u793a\u6240\u6709\u5546\u54c1\u7684\u5e93\u5b58\u603b\u6570\u91cf\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5728MYSQL\u4e2d\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u7684\u65b9\u6cd5\u3002\u5728\u8fdb\u884c\u5e93\u5b58\u7ba1\u7406\u7684\u65f6\u5019\uff0c\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u6709\u7528\u7684\u6280\u5de7\u3002<\/p>\n<h2 class=\"wp-block-heading\"><strong>\u5ef6\u4f38\u9605\u8bfb<\/strong><\/h2>\n<p>\u300aMYSQL \u5fc5\u77e5\u5fc5\u4f1a\u300b\u662f\u4e00\u672c\u7531Ben Forta\u8457\u4f5c\u7684MYSQL\u5b66\u4e60\u4e66\u7c4d\u3002\u5168\u4e66\u901a\u8fc7\u5b9e\u4f8b\u4ee5\u53ca\u8be6\u7ec6\u7684\u89e3\u91ca\uff0c\u5f15\u5bfc\u8bfb\u8005\u5b66\u4e60\u5982\u4f55\u4f7f\u7528MYSQL\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u3001\u6570\u636e\u66f4\u65b0\u548c\u5220\u9664\u3001\u4f7f\u7528\u51fd\u6570\u7b49\u57fa\u672c\u64cd\u4f5c\uff0c\u540c\u65f6\u4e5f\u6db5\u76d6\u4e86\u5982\u4f55\u521b\u5efa\u548c\u7ba1\u7406\u6570\u636e\u5e93\u3001\u8868\u683c\u7b49\u9ad8\u7ea7\u5185\u5bb9\u3002\u5bf9\u4e8e\u5b66\u4e60MYSQL\u975e\u5e38\u6709\u5e2e\u52a9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4f7f\u7528MYSQL\u8bed\u53e5\u6765\u67e5\u8be2\u5e93\u5b58\u7ed3\u5b58\u6570\u91cf\u4e3b\u8981\u6db5\u76d6\u4ee5\u4e0b\u51e0\u4e2a\u90e8\u5206\uff1a1. \u7b80\u4ecb\u53ca\u521b\u5efa\u6570\u636e\u5e93\u548c\u8868\u683c\uff1b2. \u63d2\u5165\u6570\u636e\u53ca\u7406\u89e3\u6570 [&hellip;]","protected":false},"author":1,"featured_media":37711,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/37710"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=37710"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/37710\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/37711"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=37710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=37710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=37710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}