{"id":179316,"date":"2024-11-09T00:48:30","date_gmt":"2024-11-08T16:48:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179316\/"},"modified":"2024-11-09T00:48:31","modified_gmt":"2024-11-08T16:48:31","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-mysql-%e6%9f%a5%e8%a9%a2%e6%8c%87%e5%ae%9a%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e6%8e%8c%e6%8f%a1%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7-mysql-%e6%9f%a5%e8%a9%a2%e6%8c%87","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179316\/","title":{"rendered":"\u5982\u4f55\u7528 MySQL \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab\uff1a\u638c\u63e1\u67e5\u8a62\u6280\u5de7 (mysql \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%94%a8-mysql-%e6%9f%a5%e8%a9%a2%e6%8c%87%e5%ae%9a%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9a%e6%8e%8c%e6%8f%a1%e6%9f%a5%e8%a9%a2%e6%8a%80%e5%b7%a7-wVkVhfsCTX\">\u5982\u4f55\u7528 MySQL \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab\uff1a\u638c\u63e1\u67e5\u8a62\u6280\u5de7<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cMySQL \u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u7db2\u7ad9\u9084\u662f\u5927\u578b\u4f01\u696d\u7cfb\u7d71\uff0cMySQL \u90fd\u80fd\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 MySQL \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab\uff0c\u4e26\u5206\u4eab\u4e00\u4e9b\u5be6\u7528\u7684\u67e5\u8a62\u6280\u5de7\u3002<\/p>\n<h2 id=\"1-%e9%80%a3%e6%8e%a5%e5%88%b0-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab-wVkVhfsCTX\">1. \u9023\u63a5\u5230 MySQL \u6578\u64da\u5eab<\/h2>\n<p>\u5728\u958b\u59cb\u67e5\u8a62\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u9023\u63a5\u5230 MySQL \u6578\u64da\u5eab\u3002\u9019\u53ef\u4ee5\u901a\u904e\u547d\u4ee4\u884c\u5de5\u5177\u6216\u5716\u5f62\u7528\u6236\u754c\u9762\uff08\u5982 phpMyAdmin\uff09\u4f86\u5b8c\u6210\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u547d\u4ee4\u884c\u9023\u63a5\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>mysql -u username -p<\/code><\/pre>\n<p>\u5728\u8f38\u5165\u4e0a\u8ff0\u547d\u4ee4\u5f8c\uff0c\u7cfb\u7d71\u6703\u63d0\u793a\u60a8\u8f38\u5165\u5bc6\u78bc\u3002\u6210\u529f\u767b\u9304\u5f8c\uff0c\u60a8\u5c07\u9032\u5165 MySQL \u63d0\u793a\u7b26\u3002<\/p>\n<h2 id=\"2-%e9%81%b8%e6%93%87%e6%8c%87%e5%ae%9a%e6%95%b8%e6%93%9a%e5%ba%ab-wVkVhfsCTX\">2. \u9078\u64c7\u6307\u5b9a\u6578\u64da\u5eab<\/h2>\n<p>\u9023\u63a5\u5230 MySQL \u5f8c\uff0c\u60a8\u9700\u8981\u9078\u64c7\u8981\u67e5\u8a62\u7684\u6578\u64da\u5eab\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u9078\u64c7\u6578\u64da\u5eab\uff1a<\/p>\n<pre><code>USE database_name;<\/code><\/pre>\n<p>\u5c07 <code>database_name<\/code> \u66ff\u63db\u70ba\u60a8\u8981\u67e5\u8a62\u7684\u6578\u64da\u5eab\u540d\u7a31\u3002\u9078\u64c7\u6578\u64da\u5eab\u5f8c\uff0c\u6240\u6709\u5f8c\u7e8c\u7684\u67e5\u8a62\u90fd\u5c07\u91dd\u5c0d\u8a72\u6578\u64da\u5eab\u9032\u884c\u3002<\/p>\n<h2 id=\"3-%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2%e8%aa%9e%e6%b3%95-wVkVhfsCTX\">3. \u57fa\u672c\u67e5\u8a62\u8a9e\u6cd5<\/h2>\n<p>\u5728\u9078\u64c7\u4e86\u6307\u5b9a\u6578\u64da\u5eab\u5f8c\uff0c\u60a8\u53ef\u4ee5\u958b\u59cb\u57f7\u884c\u67e5\u8a62\u3002\u6700\u57fa\u672c\u7684\u67e5\u8a62\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2 FROM table_name;<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>column1<\/code> \u548c <code>column2<\/code> \u662f\u60a8\u5e0c\u671b\u67e5\u8a62\u7684\u5217\u540d\uff0c\u800c <code>table_name<\/code> \u662f\u60a8\u8981\u67e5\u8a62\u7684\u8868\u540d\u3002\u5982\u679c\u60a8\u5e0c\u671b\u67e5\u8a62\u6240\u6709\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u661f\u865f\uff08*\uff09\uff1a<\/p>\n<pre><code>SELECT * FROM table_name;<\/code><\/pre>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e6%a2%9d%e4%bb%b6%e9%81%8e%e6%bf%be%e6%95%b8%e6%93%9a-wVkVhfsCTX\">4. \u4f7f\u7528\u689d\u4ef6\u904e\u6ffe\u6578\u64da<\/h2>\n<p>\u5728\u67e5\u8a62\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 <code>WHERE<\/code> \u5b50\u53e5\u4f86\u904e\u6ffe\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u53ea\u60f3\u67e5\u8a62\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\u8a18\u9304\u3002<\/p>\n<h2 id=\"5-%e6%8e%92%e5%ba%8f%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-wVkVhfsCTX\">5. \u6392\u5e8f\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\u53ef\u4ee5\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u4ee5\u4e0b\u662f\u6309\u5e74\u9f61\u5347\u5e8f\u6392\u5217\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT * FROM users ORDER BY age ASC;<\/code><\/pre>\n<p>\u5982\u679c\u60a8\u5e0c\u671b\u6309\u5e74\u9f61\u964d\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>DESC<\/code>\uff1a<\/p>\n<pre><code>SELECT * FROM users ORDER BY age DESC;<\/code><\/pre>\n<h2 id=\"6-%e9%99%90%e5%88%b6%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-wVkVhfsCTX\">6. \u9650\u5236\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u6709\u6642\u5019\uff0c\u60a8\u53ef\u80fd\u53ea\u60f3\u67e5\u770b\u67e5\u8a62\u7d50\u679c\u7684\u524d\u5e7e\u689d\u8a18\u9304\u3002\u9019\u53ef\u4ee5\u901a\u904e <code>LIMIT<\/code> \u5b50\u53e5\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>SELECT * FROM users LIMIT 10;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u524d 10 \u689d\u7528\u6236\u8a18\u9304\u3002<\/p>\n<h2 id=\"7-%e8%81%9a%e5%90%88%e5%87%bd%e6%95%b8%e7%9a%84%e4%bd%bf%e7%94%a8-wVkVhfsCTX\">7. \u805a\u5408\u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n<p>MySQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u805a\u5408\u51fd\u6578\uff0c\u5982 <code>COUNT<\/code>\u3001<code>SUM<\/code>\u3001<code>AVG<\/code> \u7b49\uff0c\u9019\u4e9b\u51fd\u6578\u53ef\u4ee5\u5e6b\u52a9\u60a8\u9032\u884c\u6578\u64da\u5206\u6790\u3002\u4f8b\u5982\uff0c\u8a08\u7b97\u7528\u6236\u7e3d\u6578\u7684\u67e5\u8a62\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM users;<\/code><\/pre>\n<h2 id=\"8-%e5%b0%8f%e7%b5%90-wVkVhfsCTX\">8. \u5c0f\u7d50<\/h2>\n<p>\u638c\u63e1 MySQL \u7684\u67e5\u8a62\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u5b78\u7fd2\u5982\u4f55\u9078\u64c7\u6578\u64da\u5eab\u3001\u57f7\u884c\u57fa\u672c\u67e5\u8a62\u3001\u4f7f\u7528\u689d\u4ef6\u904e\u6ffe\u3001\u6392\u5e8f\u548c\u9650\u5236\u7d50\u679c\uff0c\u60a8\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u96a8\u8457\u5c0d MySQL \u7684\u6df1\u5165\u4e86\u89e3\uff0c\u60a8\u5c07\u80fd\u5920\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u548c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wVkVhfsCTX\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u63a2\u8a0e\u4e86\u5982\u4f55\u4f7f\u7528 MySQL \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab\u7684\u57fa\u672c\u6280\u5de7\u3002\u7121\u8ad6\u60a8\u662f\u521d\u5b78\u8005\u9084\u662f\u6709\u7d93\u9a57\u7684\u958b\u767c\u8005\uff0c\u9019\u4e9b\u6280\u5de7\u90fd\u5c07\u5e6b\u52a9\u60a8\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u3002\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684\u670d\u52d9\uff0c\u8b93\u60a8\u7684\u6578\u64da\u7ba1\u7406\u66f4\u52a0\u8f15\u9b06\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 MySQL \u67e5\u8a62\u6307\u5b9a\u6578\u64da\u5eab\uff0c\u638c\u63e1\u6709\u6548\u7684\u67e5\u8a62\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u8207\u5206\u6790\u80fd\u529b\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-179316","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179316","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=179316"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179316\/revisions"}],"predecessor-version":[{"id":179317,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179316\/revisions\/179317"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}