{"id":75816,"date":"2024-10-16T01:28:15","date_gmt":"2024-10-15T17:28:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75816\/"},"modified":"2024-10-16T01:28:15","modified_gmt":"2024-10-15T17:28:15","slug":"mysql-%e6%9f%a5%e8%a9%a2%e6%85%a2%e5%88%a5%e6%80%aa%e7%b4%a2%e5%bc%95%ef%bc%8c%e6%b2%92%e6%ba%96%e6%98%af%e9%80%99%e4%ba%9b%e5%8e%9f%e5%9b%a0%e5%b0%8e%e8%87%b4%e7%9a%84%ef%bc%81","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75816\/","title":{"rendered":"MySQL \u67e5\u8a62\u6162\u5225\u602a\u7d22\u5f15\uff0c\u6c92\u6e96\u662f\u9019\u4e9b\u539f\u56e0\u5c0e\u81f4\u7684\uff01"},"content":{"rendered":"<h1 id=\"mysql-%e6%9f%a5%e8%a9%a2%e6%85%a2%e5%88%a5%e6%80%aa%e7%b4%a2%e5%bc%95%ef%bc%8c%e6%b2%92%e6%ba%96%e6%98%af%e9%80%99%e4%ba%9b%e5%8e%9f%e5%9b%a0%e5%b0%8e%e8%87%b4%e7%9a%84%ef%bc%81-zpxSudtJfX\">MySQL \u67e5\u8a62\u6162\u5225\u602a\u7d22\u5f15\uff0c\u6c92\u6e96\u662f\u9019\u4e9b\u539f\u56e0\u5c0e\u81f4\u7684\uff01<\/h1>\n<p>\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u7684\u904e\u7a0b\u4e2d\uff0c\u67e5\u8a62\u901f\u5ea6\u6162\u662f\u8a31\u591a\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u5e38\u5e38\u9762\u81e8\u7684\u554f\u984c\u3002\u96d6\u7136\u7d22\u5f15\u7684\u78ba\u662f\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u56e0\u7d20\uff0c\u4f46\u67e5\u8a62\u6162\u7684\u539f\u56e0\u5f80\u5f80\u4e0d\u50c5\u50c5\u662f\u7d22\u5f15\u7684\u7f3a\u5931\u6216\u4e0d\u7576\u4f7f\u7528\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9b\u53ef\u80fd\u5c0e\u81f4 MySQL \u67e5\u8a62\u901f\u5ea6\u8b8a\u6162\u7684\u5176\u4ed6\u539f\u56e0\uff0c\u5e6b\u52a9\u60a8\u66f4\u5168\u9762\u5730\u7406\u89e3\u548c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u3002<\/p>\n<h2 id=\"1-%e4%b8%8d%e5%90%88%e7%90%86%e7%9a%84%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-zpxSudtJfX\">1. \u4e0d\u5408\u7406\u7684\u67e5\u8a62\u8a9e\u53e5<\/h2>\n<p>\u67e5\u8a62\u8a9e\u53e5\u7684\u8a2d\u8a08\u5c0d\u6027\u80fd\u5f71\u97ff\u5de8\u5927\u3002\u4f7f\u7528\u4e0d\u5fc5\u8981\u7684 SELECT * \u6703\u5c0e\u81f4 MySQL \u8fd4\u56de\u6240\u6709\u5217\uff0c\u589e\u52a0\u4e86\u6578\u64da\u50b3\u8f38\u7684\u8ca0\u64d4\u3002\u76f8\u53cd\uff0c\u61c9\u8a72\u53ea\u9078\u64c7\u9700\u8981\u7684\u5217\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT name, age FROM users WHERE age &gt; 18;<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u4f7f\u7528 JOIN \u6642\uff0c\u61c9\u78ba\u4fdd\u53ea\u9023\u63a5\u5fc5\u8981\u7684\u8868\uff0c\u4e26\u4e14\u5728 WHERE \u5b50\u53e5\u4e2d\u4f7f\u7528\u9069\u7576\u7684\u689d\u4ef6\u4f86\u904e\u6ffe\u6578\u64da\u3002<\/p>\n<h2 id=\"2-%e5%a4%a7%e9%87%8f%e6%95%b8%e6%93%9a%e7%9a%84%e8%99%95%e7%90%86-zpxSudtJfX\">2. \u5927\u91cf\u6578\u64da\u7684\u8655\u7406<\/h2>\n<p>\u7576\u67e5\u8a62\u6d89\u53ca\u5927\u91cf\u6578\u64da\u6642\uff0c\u6027\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u6cd5\u4f86\u512a\u5316\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 LIMIT \u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\u3002<\/li>\n<li>\u8003\u616e\u5206\u9801\u67e5\u8a62\uff0c\u907f\u514d\u4e00\u6b21\u6027\u52a0\u8f09\u904e\u591a\u6578\u64da\u3002<\/li>\n<li>\u5b9a\u671f\u6e05\u7406\u4e0d\u5fc5\u8981\u7684\u6578\u64da\uff0c\u6e1b\u5c11\u8868\u7684\u5927\u5c0f\u3002<\/li>\n<\/ul>\n<h2 id=\"3-%e9%8e%96%e5%ae%9a%e5%95%8f%e9%a1%8c-zpxSudtJfX\">3. \u9396\u5b9a\u554f\u984c<\/h2>\n<p>\u5728\u9ad8\u4f75\u767c\u74b0\u5883\u4e2d\uff0c\u9396\u5b9a\u554f\u984c\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\u3002\u7576\u4e00\u500b\u67e5\u8a62\u6b63\u5728\u57f7\u884c\u6642\uff0c\u5176\u4ed6\u67e5\u8a62\u53ef\u80fd\u9700\u8981\u7b49\u5f85\uff0c\u9019\u6703\u589e\u52a0\u5ef6\u9072\u3002\u70ba\u4e86\u6e1b\u5c11\u9396\u5b9a\u7684\u5f71\u97ff\uff0c\u53ef\u4ee5\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u66f4\u7d30\u7c92\u5ea6\u7684\u9396\u5b9a\uff0c\u4f8b\u5982\u884c\u9396\u800c\u975e\u8868\u9396\u3002<\/li>\n<li>\u512a\u5316\u4e8b\u52d9\u7684\u7bc4\u570d\uff0c\u6e1b\u5c11\u9396\u5b9a\u7684\u6301\u6709\u6642\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"4-%e4%b8%8d%e7%95%b6%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-zpxSudtJfX\">4. \u4e0d\u7576\u7684\u6578\u64da\u985e\u578b<\/h2>\n<p>\u9078\u64c7\u4e0d\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u904e\u5927\u7684\u6578\u64da\u985e\u578b\u6703\u6d6a\u8cbb\u5b58\u5132\u7a7a\u9593\uff0c\u4e26\u589e\u52a0 I\/O \u64cd\u4f5c\u7684\u8ca0\u64d4\u3002\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u5c0d\u65bc\u6574\u6578\uff0c\u4f7f\u7528 INT \u800c\u975e BIGINT\u3002<\/li>\n<li>\u5c0d\u65bc\u5b57\u7b26\uff0c\u4f7f\u7528 VARCHAR \u800c\u975e CHAR\u3002<\/li>\n<\/ul>\n<h2 id=\"5-%e7%bc%93%e5%ad%98%e6%9c%aa%e5%91%bd%e4%b8%ad-zpxSudtJfX\">5. \u7f13\u5b58\u672a\u547d\u4e2d<\/h2>\n<p>MySQL \u4f7f\u7528\u7de9\u5b58\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5982\u679c\u67e5\u8a62\u672a\u547d\u4e2d\u7de9\u5b58\uff0c\u5247\u9700\u8981\u5f9e\u78c1\u789f\u4e2d\u8b80\u53d6\u6578\u64da\uff0c\u9019\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u70ba\u4e86\u63d0\u9ad8\u7de9\u5b58\u547d\u4e2d\u7387\uff0c\u53ef\u4ee5\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u8abf\u6574 MySQL \u7684\u7de9\u5b58\u914d\u7f6e\uff0c\u4f8b\u5982\u589e\u52a0 key_buffer_size \u548c query_cache_size\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u67e5\u8a62\u4f86\u63d0\u9ad8\u91cd\u8907\u67e5\u8a62\u7684\u547d\u4e2d\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"6-%e7%a1%ac%e9%ab%94%e8%b3%87%e6%ba%90%e4%b8%8d%e8%b6%b3-zpxSudtJfX\">6. \u786c\u9ad4\u8cc7\u6e90\u4e0d\u8db3<\/h2>\n<p>\u6700\u5f8c\uff0c\u786c\u9ad4\u8cc7\u6e90\u7684\u4e0d\u8db3\u4e5f\u6703\u5f71\u97ff MySQL \u7684\u6027\u80fd\u3002\u5982\u679c CPU\u3001\u5167\u5b58\u6216\u78c1\u789f I\/O \u904e\u8f09\uff0c\u67e5\u8a62\u901f\u5ea6\u81ea\u7136\u6703\u8b8a\u6162\u3002\u5b9a\u671f\u76e3\u63a7\u7cfb\u7d71\u8cc7\u6e90\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u5347\u7d1a\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zpxSudtJfX\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u67e5\u8a62\u901f\u5ea6\u6162\u7684\u539f\u56e0\u591a\u7a2e\u591a\u6a23\uff0c\u9664\u4e86\u7d22\u5f15\u554f\u984c\u5916\uff0c\u67e5\u8a62\u8a9e\u53e5\u8a2d\u8a08\u3001\u6578\u64da\u91cf\u3001\u9396\u5b9a\u554f\u984c\u3001\u6578\u64da\u985e\u578b\u3001\u7de9\u5b58\u547d\u4e2d\u7387\u4ee5\u53ca\u786c\u9ad4\u8cc7\u6e90\u7b49\u90fd\u53ef\u80fd\u5f71\u97ff\u6027\u80fd\u3002\u901a\u904e\u5c0d\u9019\u4e9b\u56e0\u7d20\u7684\u6df1\u5165\u5206\u6790\u548c\u512a\u5316\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8 MySQL \u7684\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u63d0\u5347\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 MySQL \u67e5\u8a62\u6162\u7684\u539f\u56e0\uff0c\u9664\u4e86\u7d22\u5f15\u554f\u984c\uff0c\u9084\u6709\u5176\u4ed6\u56e0\u7d20\u5f71\u97ff\u6027\u80fd\uff0c\u52a9\u4f60\u512a\u5316\u6578\u64da\u5eab\u6548\u7387\uff01<\/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-75816","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75816","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=75816"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75816\/revisions"}],"predecessor-version":[{"id":75817,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75816\/revisions\/75817"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75816"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75816"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75816"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}