{"id":143963,"date":"2024-11-01T02:43:19","date_gmt":"2024-10-31T18:43:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143963\/"},"modified":"2024-11-01T02:43:20","modified_gmt":"2024-10-31T18:43:20","slug":"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ad%89%e4%bf%9d%e6%b8%ac%e8%a9%95%ef%bc%9a%e9%97%9c%e9%8d%b5%e8%aa%9e%e5%8f%a5%e8%a7%a3%e6%9e%90-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ad%89%e4%bf%9d%e6%b8%ac%e8%a9%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143963\/","title":{"rendered":"SQL \u6578\u64da\u5eab\u7b49\u4fdd\u6e2c\u8a55\uff1a\u95dc\u9375\u8a9e\u53e5\u89e3\u6790 (sql \u6578\u64da\u5eab\u7b49\u4fdd\u6e2c\u8a55\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%ad%89%e4%bf%9d%e6%b8%ac%e8%a9%95%ef%bc%9a%e9%97%9c%e9%8d%b5%e8%aa%9e%e5%8f%a5%e8%a7%a3%e6%9e%90-KJSJhQNhSm\">SQL \u6578\u64da\u5eab\u7b49\u4fdd\u6e2c\u8a55\uff1a\u95dc\u9375\u8a9e\u53e5\u89e3\u6790<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u5b89\u5168\u6027\u548c\u5408\u898f\u6027\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7279\u5225\u662f\u5728\u4e2d\u570b\uff0c\u96a8\u8457\u300a\u7db2\u7d61\u5b89\u5168\u6cd5\u300b\u7684\u5be6\u65bd\uff0c\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\u6210\u70ba\u4f01\u696d\u5fc5\u9808\u9762\u5c0d\u7684\u6311\u6230\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\uff0c\u4e26\u89e3\u6790\u4e00\u4e9b\u95dc\u9375\u8a9e\u53e5\uff0c\u4ee5\u5e6b\u52a9\u4f01\u696d\u66f4\u597d\u5730\u7406\u89e3\u548c\u61c9\u5c0d\u9019\u4e00\u8981\u6c42\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%ad%89%e4%bf%9d%e6%b8%ac%e8%a9%95%ef%bc%9f-KJSJhQNhSm\">\u4ec0\u9ebc\u662f\u7b49\u4fdd\u6e2c\u8a55\uff1f<\/h2>\n<p>\u7b49\u4fdd\u6e2c\u8a55\uff0c\u5373\u7b49\u7d1a\u4fdd\u8b77\u6e2c\u8a55\uff0c\u662f\u6307\u6839\u64da\u300a\u4fe1\u606f\u5b89\u5168\u7b49\u7d1a\u4fdd\u8b77\u7ba1\u7406\u8fa6\u6cd5\u300b\u5c0d\u4fe1\u606f\u7cfb\u7d71\u9032\u884c\u7684\u5b89\u5168\u6027\u8a55\u4f30\u3002\u6839\u64da\u7cfb\u7d71\u7684\u91cd\u8981\u6027\u548c\u654f\u611f\u6027\uff0c\u4fe1\u606f\u7cfb\u7d71\u88ab\u5283\u5206\u70ba\u4e94\u500b\u7b49\u7d1a\uff0c\u7b49\u7d1a\u8d8a\u9ad8\uff0c\u5b89\u5168\u8981\u6c42\u8d8a\u56b4\u683c\u3002SQL\u6578\u64da\u5eab\u4f5c\u70ba\u4fe1\u606f\u7cfb\u7d71\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\uff0c\u5176\u5b89\u5168\u6027\u76f4\u63a5\u5f71\u97ff\u5230\u6574\u500b\u7cfb\u7d71\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h2 id=\"sql%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%ad%89%e4%bf%9d%e6%b8%ac%e8%a9%95%e8%a6%81%e6%b1%82-KJSJhQNhSm\">SQL\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\u8981\u6c42<\/h2>\n<p>\u5728\u9032\u884cSQL\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\u6642\uff0c\u4e3b\u8981\u9700\u8981\u8003\u616e\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u8eab\u4efd\u9a57\u8b49\uff1a<\/strong>\u78ba\u4fdd\u53ea\u6709\u6388\u6b0a\u7528\u6236\u80fd\u5920\u8a2a\u554f\u6578\u64da\u5eab\u3002<\/li>\n<li><strong>\u8a2a\u554f\u63a7\u5236\uff1a<\/strong>\u6839\u64da\u7528\u6236\u89d2\u8272\u8a2d\u7f6e\u4e0d\u540c\u7684\u8a2a\u554f\u6b0a\u9650\u3002<\/li>\n<li><strong>\u6578\u64da\u52a0\u5bc6\uff1a<\/strong>\u5c0d\u654f\u611f\u6578\u64da\u9032\u884c\u52a0\u5bc6\u5b58\u5132\u548c\u50b3\u8f38\u3002<\/li>\n<li><strong>\u65e5\u8a8c\u7ba1\u7406\uff1a<\/strong>\u8a18\u9304\u7528\u6236\u64cd\u4f5c\u548c\u7cfb\u7d71\u4e8b\u4ef6\uff0c\u4ee5\u4fbf\u65bc\u5f8c\u7e8c\u7684\u5b89\u5168\u5be9\u8a08\u3002<\/li>\n<li><strong>\u6f0f\u6d1e\u7ba1\u7406\uff1a<\/strong>\u5b9a\u671f\u6aa2\u67e5\u548c\u4fee\u88dc\u6578\u64da\u5eab\u7684\u5b89\u5168\u6f0f\u6d1e\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%97%9c%e9%8d%b5%e8%aa%9e%e5%8f%a5%e8%a7%a3%e6%9e%90-KJSJhQNhSm\">\u95dc\u9375\u8a9e\u53e5\u89e3\u6790<\/h2>\n<p>\u5728SQL\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\u4e2d\uff0c\u6709\u5e7e\u500b\u95dc\u9375\u7684SQL\u8a9e\u53e5\u9700\u8981\u7279\u5225\u6ce8\u610f\uff0c\u9019\u4e9b\u8a9e\u53e5\u80fd\u5920\u5e6b\u52a9\u4f01\u696d\u6aa2\u67e5\u548c\u52a0\u5f37\u6578\u64da\u5eab\u7684\u5b89\u5168\u6027\u3002<\/p>\n<h3 id=\"1-%e7%94%a8%e6%88%b6%e6%ac%8a%e9%99%90%e6%9f%a5%e8%a9%a2-KJSJhQNhSm\">1. \u7528\u6236\u6b0a\u9650\u67e5\u8a62<\/h3>\n<pre><code>SELECT * FROM information_schema.user_privileges;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u53ef\u4ee5\u67e5\u8a62\u7576\u524d\u6578\u64da\u5eab\u4e2d\u6240\u6709\u7528\u6236\u7684\u6b0a\u9650\u8a2d\u7f6e\u3002\u901a\u904e\u6aa2\u67e5\u7528\u6236\u7684\u6b0a\u9650\uff0c\u53ef\u4ee5\u78ba\u4fdd\u6c92\u6709\u591a\u9918\u7684\u6b0a\u9650\u88ab\u6388\u4e88\uff0c\u5f9e\u800c\u964d\u4f4e\u5b89\u5168\u98a8\u96aa\u3002<\/p>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e6%95%b8%e9%87%8f%e9%99%90%e5%88%b6-KJSJhQNhSm\">2. \u6578\u64da\u5eab\u9023\u63a5\u6578\u91cf\u9650\u5236<\/h3>\n<pre><code>SHOW VARIABLES LIKE 'max_connections';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7528\u65bc\u67e5\u770b\u6578\u64da\u5eab\u7684\u6700\u5927\u9023\u63a5\u6578\u8a2d\u7f6e\u3002\u5408\u7406\u7684\u9023\u63a5\u6578\u9650\u5236\u53ef\u4ee5\u9632\u6b62\u62d2\u7d55\u670d\u52d9\u653b\u64ca\uff08DoS\uff09\uff0c\u4fdd\u8b77\u6578\u64da\u5eab\u7684\u53ef\u7528\u6027\u3002<\/p>\n<h3 id=\"3-%e6%97%a5%e8%aa%8c%e6%9f%a5%e8%a9%a2-KJSJhQNhSm\">3. \u65e5\u8a8c\u67e5\u8a62<\/h3>\n<pre><code>SELECT * FROM mysql.general_log WHERE event_time &gt; NOW() - INTERVAL 1 DAY;<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u53ef\u4ee5\u67e5\u8a62\u904e\u53bb\u4e00\u5929\u5167\u7684\u6240\u6709\u64cd\u4f5c\u65e5\u8a8c\u3002\u901a\u904e\u5206\u6790\u65e5\u8a8c\uff0c\u53ef\u4ee5\u53ca\u6642\u767c\u73fe\u7570\u5e38\u64cd\u4f5c\uff0c\u4e26\u9032\u884c\u76f8\u61c9\u7684\u8655\u7406\u3002<\/p>\n<h3 id=\"4-%e6%95%b8%e6%93%9a%e5%8a%a0%e5%af%86%e6%aa%a2%e6%9f%a5-KJSJhQNhSm\">4. \u6578\u64da\u52a0\u5bc6\u6aa2\u67e5<\/h3>\n<pre><code>SHOW VARIABLES LIKE 'have_openssl';<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u7528\u65bc\u6aa2\u67e5\u6578\u64da\u5eab\u662f\u5426\u652f\u6301SSL\u52a0\u5bc6\u3002\u78ba\u4fdd\u6578\u64da\u5728\u50b3\u8f38\u904e\u7a0b\u4e2d\u662f\u52a0\u5bc6\u7684\uff0c\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u6578\u64da\u88ab\u7aca\u53d6\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-KJSJhQNhSm\">\u7d50\u8ad6<\/h2>\n<p>SQL\u6578\u64da\u5eab\u7684\u7b49\u4fdd\u6e2c\u8a55\u662f\u4e00\u500b\u8907\u96dc\u800c\u91cd\u8981\u7684\u904e\u7a0b\uff0c\u4f01\u696d\u9700\u8981\u5145\u5206\u7406\u89e3\u76f8\u95dc\u8981\u6c42\u4e26\u63a1\u53d6\u76f8\u61c9\u7684\u63aa\u65bd\u4f86\u52a0\u5f37\u6578\u64da\u5eab\u7684\u5b89\u5168\u6027\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u95dc\u9375SQL\u8a9e\u53e5\uff0c\u4f01\u696d\u53ef\u4ee5\u6709\u6548\u5730\u6aa2\u67e5\u548c\u7ba1\u7406\u6578\u64da\u5eab\u7684\u5b89\u5168\u72c0\u614b\uff0c\u5f9e\u800c\u964d\u4f4e\u6f5b\u5728\u7684\u5b89\u5168\u98a8\u96aa\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u89e3\u6790SQL\u6578\u64da\u5eab\u7b49\u4fdd\u6e2c\u8a55\u7684\u95dc\u9375\u8a9e\u53e5\uff0c\u52a9\u60a8\u7406\u89e3\u6578\u64da\u5b89\u5168\u5408\u898f\u8981\u6c42\uff0c\u63d0\u5347\u6578\u64da\u4fdd\u8b77\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-143963","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143963","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=143963"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143963\/revisions"}],"predecessor-version":[{"id":143964,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143963\/revisions\/143964"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}