{"id":200084,"date":"2025-05-06T09:08:43","date_gmt":"2025-05-06T01:08:43","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200084\/"},"modified":"2025-05-06T09:08:43","modified_gmt":"2025-05-06T01:08:43","slug":"%e6%8f%90%e9%ab%98mysql%e5%a4%96%e9%94%ae%e5%92%8c%e4%b8%bb%e9%94%ae%e4%b9%8b%e9%97%b4%e7%9a%84%e8%87%aa%e5%8a%a8%e8%bf%9e%e6%8e%a5%e6%95%88%e7%8e%87%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200084\/","title":{"rendered":"\u63d0\u9ad8MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\u7684\u65b9\u6cd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u63d0\u9ad8MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\u7684\u65b9\u6cd5<\/h1>\n

\u4f18\u5316 MySQL \u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\u81f3\u5173\u91cd\u8981\uff0c\u4ee5\u63d0\u5347\u6570\u636e\u5e93\u67e5\u8be2\u6027\u80fd\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u56db\u79cd\u6709\u6548\u7684\u65b9\u6cd5\uff1a\u4f7f\u7528\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b\u3001\u521b\u5efa\u7d22\u5f15\u3001\u907f\u514d\u8de8\u8868\u8fde\u63a5\u4ee5\u53ca\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u3002\u901a\u8fc7\u9009\u62e9\u4e00\u81f4\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e3a\u5916\u952e\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u62c6\u5206\u8de8\u8868\u8fde\u63a5\uff0c\u5e76\u6dfb\u52a0\u6761\u4ef6\u9650\u5236\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u8fde\u63a5\u6548\u7387\uff0c\u7f29\u77ed\u67e5\u8be2\u65f6\u95f4\uff0c\u4ece\u800c\u63d0\u5347\u7cfb\u7edf\u7684\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n

\u5982\u4f55\u4f18\u5316MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\uff1f<\/p>\n

\u5728\u6570\u636e\u5e93\u8bbe\u8ba1\u4e2d\uff0c\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u5173\u7cfb\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u5f53\u67e5\u8be2\u6d89\u53ca\u591a\u4e2a\u8868\u65f6\uff0c\u7ecf\u5e38\u9700\u8981\u4f7f\u7528\u5916\u952e\u548c\u4e3b\u952e\u8fdb\u884c\u8fde\u63a5\u64cd\u4f5c\u3002\u7136\u800c\uff0c\u5982\u679c\u4e0d\u6ce8\u610f\u4f18\u5316\u8fd9\u4e9b\u8fde\u63a5\u64cd\u4f5c\uff0c\u53ef\u80fd\u4f1a\u964d\u4f4e\u67e5\u8be2\u6548\u7387\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f18\u5316MySQL\u4e2d\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001\u4f7f\u7528\u9002\u5f53\u7684\u6570\u636e\u7c7b\u578b<\/p>\n

\u9996\u5148\uff0c\u8981\u6ce8\u610f\u5728\u5b9a\u4e49\u4e3b\u952e\u548c\u5916\u952e\u65f6\u9009\u62e9\u5408\u9002\u7684\u6570\u636e\u7c7b\u578b\u3002\u6570\u636e\u7c7b\u578b\u7684\u9009\u62e9\u76f4\u63a5\u5f71\u54cd\u4e86\u8fde\u63a5\u64cd\u4f5c\u7684\u6548\u7387\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u4e3b\u952e\u548c\u5916\u952e\u7684\u5b57\u6bb5\u5e94\u8be5\u91c7\u7528\u76f8\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e14\u957f\u5ea6\u8981\u5c3d\u91cf\u4e00\u81f4\u3002<\/p>\n

\u4f8b\u5982\uff0c\u5728\u521b\u5efa\u8868\u65f6\u5b9a\u4e49\u4e3b\u952e\u548c\u5916\u952e\uff1a<\/p>\n

CREATE TABLE table1 (\n    id INT PRIMARY KEY,\n    name VARCHAR(50)\n);\n\nCREATE TABLE table2 (\n    id INT PRIMARY KEY,\n    table1_id INT,\n    FOREIGN KEY (table1_id) REFERENCES table1(id)\n);<\/pre>\n
\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u4e3b\u952e\u548c\u5916\u952e\u6240\u4f7f\u7528\u7684\u6570\u636e\u7c7b\u578b\u90fd\u662fINT\uff0c\u4fdd\u6301\u4e86\u4e00\u81f4\u6027\uff0c\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u8fde\u63a5\u6548\u7387\u3002<\/p>\n
\u4e8c\u3001\u521b\u5efa\u7d22\u5f15<\/p>\n
\u5176\u6b21\uff0c\u4e3a\u4e3b\u952e\u548c\u5916\u952e\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\u662f\u63d0\u9ad8\u8fde\u63a5\u6548\u7387\u7684\u5173\u952e\u3002\u7d22\u5f15\u53ef\u4ee5\u5927\u5927\u51cf\u5c11\u67e5\u8be2\u65f6\u9700\u8981\u626b\u63cf\u7684\u6570\u636e\u91cf\uff0c\u4ece\u800c\u52a0\u5feb\u8fde\u63a5\u7684\u901f\u5ea6\u3002<\/p>\n
\u5728MySQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u5f0f\u4e3a\u4e3b\u952e\u548c\u5916\u952e\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff1a<\/p>\n
CREATE INDEX idx_table1_id ON table2(table1_id);<\/pre>\n
\u901a\u8fc7\u4e3a\u5916\u952e\u5b57\u6bb5\u521b\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u5728\u8fde\u63a5\u65f6\u5feb\u901f\u5b9a\u4f4d\u5230\u5339\u914d\u7684\u4e3b\u952e\u503c\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n
\u4e09\u3001\u907f\u514d\u8de8\u8868\u8fde\u63a5<\/p>\n
\u53e6\u5916\uff0c\u8981\u5c3d\u91cf\u907f\u514d\u5728\u8fde\u63a5\u64cd\u4f5c\u4e2d\u6d89\u53ca\u591a\u4e2a\u8868\uff0c\u5e76\u4e14\u5c3d\u91cf\u4f7f\u7528\u5185\u8fde\u63a5\u800c\u4e0d\u662f\u5916\u8fde\u63a5\u3002\u8de8\u8868\u8fde\u63a5\u4f1a\u589e\u52a0\u6570\u636e\u5e93\u7684\u8d1f\u62c5\uff0c\u5bfc\u81f4\u67e5\u8be2\u6548\u7387\u4e0b\u964d\u3002<\/p>\n
\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6d89\u53ca\u591a\u4e2a\u8868\u7684\u5916\u8fde\u63a5\u64cd\u4f5c\uff1a<\/p>\n
SELECT * FROM table1\nLEFT JOIN table2 ON table1.id = table2.table1_id;<\/pre>\n
\u5c3d\u91cf\u5c06\u64cd\u4f5c\u62c6\u5206\u4e3a\u591a\u4e2a\u7b80\u5355\u7684\u8fde\u63a5\u64cd\u4f5c\uff0c\u907f\u514d\u8de8\u8868\u8fde\u63a5\uff1a<\/p>\n
SELECT * FROM table1, table2 WHERE table1.id = table2.table1_id;<\/pre>\n
\u56db\u3001\u4f18\u5316\u67e5\u8be2\u8bed\u53e5<\/p>\n
\u6700\u540e\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\u6765\u63d0\u9ad8\u8fde\u63a5\u6548\u7387\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u5408\u9002\u7684\u6761\u4ef6\u9650\u5236\u67e5\u8be2\u8303\u56f4\uff0c\u51cf\u5c11\u8fde\u63a5\u6d89\u53ca\u7684\u6570\u636e\u91cf\u3002<\/p>\n
SELECT * FROM table1\nJOIN table2 ON table1.id = table2.table1_id\nWHERE table1.id = 100;<\/pre>\n
\u901a\u8fc7\u6dfb\u52a0\u6761\u4ef6\u9650\u5236\uff0c\u53ef\u4ee5\u7f29\u5c0f\u67e5\u8be2\u8303\u56f4\uff0c\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0c\u901a\u8fc7\u9002\u5f53\u9009\u62e9\u6570\u636e\u7c7b\u578b\u3001\u521b\u5efa\u7d22\u5f15\u3001\u907f\u514d\u8de8\u8868\u8fde\u63a5\u4ee5\u53ca\u4f18\u5316\u67e5\u8be2\u8bed\u53e5\uff0c\u53ef\u4ee5\u6709\u6548\u4f18\u5316MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u573a\u666f\u548c\u9700\u6c42\u7075\u6d3b\u8fd0\u7528\u8fd9\u4e9b\u4f18\u5316\u6280\u5de7\uff0c\u53ef\u4ee5\u63d0\u5347\u6570\u636e\u5e93\u67e5\u8be2\u6027\u80fd\uff0c\u63d0\u9ad8\u7cfb\u7edf\u7684\u54cd\u5e94\u901f\u5ea6\u3002<\/p>\n
\u6ce8\u610f\uff1a\u4ee5\u4e0a\u5185\u5bb9\u4ec5\u63d0\u4f9b\u53c2\u8003\uff0c\u5b9e\u9645\u573a\u666f\u4e2d\u9700\u6839\u636e\u5177\u4f53\u60c5\u51b5\u8fdb\u884c\u8c03\u6574\u548c\u4f18\u5316\u3002<\/p>\n
\u6587\u4e2d\u5173\u4e8eMySQL\u5916\u952e,\u4e3b\u952e\u8fde\u63a5,\u81ea\u52a8\u4f18\u5316\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u63d0\u9ad8MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea\u52a8\u8fde\u63a5\u6548\u7387\u7684\u65b9\u6cd5\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u63d0\u9ad8MySQL\u5916\u952e\u548c\u4e3b\u952e\u4e4b\u95f4\u7684\u81ea...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-200084","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200084","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=200084"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200084\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}