{"id":196418,"date":"2024-11-13T23:25:22","date_gmt":"2024-11-13T15:25:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196418\/"},"modified":"2024-11-13T23:25:23","modified_gmt":"2024-11-13T15:25:23","slug":"%e5%80%bc%e5%be%97%e6%94%b6%e8%97%8f%e9%80%99%e6%98%afsql%e6%95%b8%e6%93%9a%e5%ba%ab%e5%84%aa%e5%8c%96%e7%9a%84%e5%85%ad%e7%a8%ae%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196418\/","title":{"rendered":"\u503c\u5f97\u6536\u85cf!\u9019\u662fSQL\u6578\u64da\u5eab\u512a\u5316\u7684\u516d\u7a2e\u65b9\u6cd5"},"content":{"rendered":"

\u503c\u5f97\u6536\u85cf!\u9019\u662fSQL\u6578\u64da\u5eab\u512a\u5316\u7684\u516d\u7a2e\u65b9\u6cd5<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u5927\u578b\u4f01\u696d\u9084\u662f\u5c0f\u578b\u521d\u5275\u516c\u53f8\uff0c\u512a\u5316SQL\u6578\u64da\u5eab\u90fd\u662f\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u516d\u7a2e\u6709\u6548\u7684SQL\u6578\u64da\u5eab\u512a\u5316\u65b9\u6cd5\uff0c\u5e6b\u52a9\u60a8\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u97ff\u61c9\u901f\u5ea6\u548c\u8655\u7406\u80fd\u529b\u3002<\/p>\n

1. \u4f7f\u7528\u7d22\u5f15<\/h2>\n

\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u6700\u6709\u6548\u65b9\u6cd5\u4e4b\u4e00\u3002\u901a\u904e\u5728\u8868\u7684\u7279\u5b9a\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u6578\u64da\u5eab\u53ef\u4ee5\u66f4\u5feb\u5730\u67e5\u627e\u548c\u6aa2\u7d22\u6578\u64da\u3002\u7d22\u5f15\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u80fd\u5920\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u4fe1\u606f\u3002<\/p>\n

CREATE INDEX idx_column_name ON table_name (column_name);<\/code><\/pre>\n
\u7136\u800c\uff0c\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u7684\u63d2\u5165\u548c\u66f4\u65b0\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u6839\u64da\u5be6\u969b\u9700\u6c42\u8b39\u614e\u9078\u64c7\u7d22\u5f15\u3002<\/p>\n
2. \u512a\u5316\u67e5\u8a62\u8a9e\u53e5<\/h2>\n
\u64b0\u5beb\u9ad8\u6548\u7684SQL\u67e5\u8a62\u8a9e\u53e5\u662f\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\u7684\u53e6\u4e00\u500b\u91cd\u8981\u65b9\u9762\u3002\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u6240\u9700\u7684\u5217\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u7684\u50b3\u8f38\u91cf\u3002<\/p>\n
SELECT column1, column2 FROM table_name WHERE condition;<\/code><\/pre>\n
\u6b64\u5916\uff0c\u4f7f\u7528JOIN\u800c\u4e0d\u662f\u5b50\u67e5\u8a62\uff0c\u4e26\u78ba\u4fddWHERE\u5b50\u53e5\u4e2d\u7684\u689d\u4ef6\u80fd\u5920\u5229\u7528\u7d22\u5f15\uff0c\u9019\u6a23\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n
3. \u6b63\u78ba\u8a2d\u8a08\u6578\u64da\u5eab\u7d50\u69cb<\/h2>\n
\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u5c0d\u6027\u80fd\u6709\u8457\u6df1\u9060\u7684\u5f71\u97ff\u3002\u61c9\u6839\u64da\u5be6\u969b\u696d\u52d9\u9700\u6c42\u9032\u884c\u6b63\u898f\u5316\uff0c\u4ee5\u6d88\u9664\u5197\u9918\u6578\u64da\uff0c\u4e26\u63d0\u9ad8\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u540c\u6642\uff0c\u5c0d\u65bc\u67e5\u8a62\u983b\u7e41\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u53cd\u6b63\u898f\u5316\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
4. \u5b9a\u671f\u6e05\u7406\u6578\u64da<\/h2>\n
\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u5b9a\u671f\u6e05\u7406\u904e\u671f\u6216\u4e0d\u518d\u4f7f\u7528\u7684\u6578\u64da\uff0c\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u5927\u5c0f\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
DELETE FROM table_name WHERE condition;<\/code><\/pre>\n
\u6b64\u5916\uff0c\u5c0d\u65bc\u6b77\u53f2\u6578\u64da\uff0c\u53ef\u4ee5\u8003\u616e\u5c07\u5176\u79fb\u81f3\u5176\u4ed6\u5b58\u5132\u7cfb\u7d71\uff0c\u4ee5\u6e1b\u5c11\u4e3b\u6578\u64da\u5eab\u7684\u8ca0\u64d4\u3002<\/p>\n
5. \u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e<\/h2>\n
\u6578\u64da\u5eab\u7684\u914d\u7f6e\u53c3\u6578\u5c0d\u6027\u80fd\u6709\u8457\u76f4\u63a5\u5f71\u97ff\u3002\u6839\u64da\u5be6\u969b\u7684\u786c\u4ef6\u74b0\u5883\u548c\u61c9\u7528\u9700\u6c42\uff0c\u8abf\u6574\u7de9\u885d\u5340\u5927\u5c0f\u3001\u9023\u63a5\u6578\u91cf\u7b49\u53c3\u6578\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u3002<\/p>\n
6. \u76e3\u63a7\u548c\u5206\u6790\u6027\u80fd<\/h2>\n
\u6301\u7e8c\u76e3\u63a7\u6578\u64da\u5eab\u7684\u6027\u80fd\u662f\u78ba\u4fdd\u5176\u9ad8\u6548\u904b\u884c\u7684\u95dc\u9375\u3002\u4f7f\u7528\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u53ef\u4ee5\u53ca\u6642\u767c\u73fe\u74f6\u9838\u4e26\u9032\u884c\u8abf\u6574\u3002\u5206\u6790\u67e5\u8a62\u57f7\u884c\u8a08\u5283\uff0c\u627e\u51fa\u6027\u80fd\u554f\u984c\u7684\u6839\u6e90\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002<\/p>\n
EXPLAIN SELECT column1 FROM table_name WHERE condition;<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u901a\u904e\u4ee5\u4e0a\u516d\u7a2e\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u512a\u5316SQL\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u5f9e\u800c\u63d0\u5347\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u7d22\u5f15\u3001\u512a\u5316\u67e5\u8a62\u8a9e\u53e5\uff0c\u9084\u662f\u5b9a\u671f\u6e05\u7406\u6578\u64da\uff0c\u9019\u4e9b\u63aa\u65bd\u90fd\u80fd\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u5eab\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22\u516d\u7a2e\u6709\u6548\u7684SQL\u6578\u64da\u5eab\u512a\u5316\u65b9\u6cd5\uff0c\u63d0\u5347\u6027\u80fd\u548c\u6548\u7387\uff0c\u8b93\u60a8\u7684\u6578\u64da\u7ba1\u7406\u66f4\u5177\u50f9\u503c\uff0c\u503c\u5f97\u6536\u85cf\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-196418","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196418","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=196418"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196418\/revisions"}],"predecessor-version":[{"id":196419,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196418\/revisions\/196419"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}