{"id":168889,"date":"2024-11-06T17:06:25","date_gmt":"2024-11-06T09:06:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168889\/"},"modified":"2024-11-06T17:06:25","modified_gmt":"2024-11-06T09:06:25","slug":"%e7%be%8e%e5%9c%98%e9%9d%a2%e8%a9%a6%e7%89%b9%e6%9c%89%ef%bc%9a%e5%af%ab%e5%80%8b-sql-%e8%aa%9e%e5%8f%a5%e7%84%b6%e5%be%8c%e5%95%8f%e5%8a%a0%e4%ba%86%e5%93%aa%e4%ba%9b%e9%8e%96","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168889\/","title":{"rendered":"\u7f8e\u5718\u9762\u8a66\u7279\u6709\uff1a\u5beb\u500b SQL \u8a9e\u53e5\u7136\u5f8c\u554f\u52a0\u4e86\u54ea\u4e9b\u9396"},"content":{"rendered":"<h1 id=\"%e7%be%8e%e5%9c%98%e9%9d%a2%e8%a9%a6%e7%89%b9%e6%9c%89%ef%bc%9a%e5%af%ab%e5%80%8b-sql-%e8%aa%9e%e5%8f%a5%e7%84%b6%e5%be%8c%e5%95%8f%e5%8a%a0%e4%ba%86%e5%93%aa%e4%ba%9b%e9%8e%96-XHBDpJzByq\">\u7f8e\u5718\u9762\u8a66\u7279\u6709\uff1a\u5beb\u500b SQL \u8a9e\u53e5\u7136\u5f8c\u554f\u52a0\u4e86\u54ea\u4e9b\u9396<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u79d1\u6280\u884c\u696d\u4e2d\uff0c\u6578\u64da\u5eab\u7ba1\u7406\u548c\u64cd\u4f5c\u662f\u6bcf\u4f4d\u958b\u767c\u8005\u5fc5\u9808\u638c\u63e1\u7684\u6280\u80fd\u4e4b\u4e00\u3002\u5c24\u5176\u662f\u5728\u9762\u8a66\u904e\u7a0b\u4e2d\uff0c\u9762\u8a66\u5b98\u7d93\u5e38\u6703\u8981\u6c42\u5019\u9078\u4eba\u64b0\u5beb SQL \u8a9e\u53e5\uff0c\u4e26\u9032\u4e00\u6b65\u8a62\u554f\u5728\u57f7\u884c\u8a72\u8a9e\u53e5\u6642\u53ef\u80fd\u6703\u52a0\u4e0a\u7684\u9396\u3002\u9019\u4e0d\u50c5\u8003\u9a57\u4e86\u5019\u9078\u4eba\u7684 SQL \u6280\u80fd\uff0c\u9084\u8003\u5bdf\u4e86\u4ed6\u5011\u5c0d\u6578\u64da\u5eab\u9396\u6a5f\u5236\u7684\u7406\u89e3\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e00\u4e3b\u984c\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u6e96\u5099\u9762\u8a66\u3002<\/p>\n<h2 id=\"sql-%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-XHBDpJzByq\">SQL \u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u57fa\u672c\u7684 SQL \u8a9e\u53e5\u5305\u62ec SELECT\u3001INSERT\u3001UPDATE \u548c DELETE\u3002\u9019\u4e9b\u8a9e\u53e5\u7684\u57f7\u884c\u6703\u5f71\u97ff\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u4e26\u53ef\u80fd\u5c0e\u81f4\u9396\u7684\u7522\u751f\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-sql-%e8%aa%9e%e5%8f%a5-XHBDpJzByq\">\u793a\u4f8b SQL \u8a9e\u53e5<\/h3>\n<pre><code>SELECT * FROM users WHERE id = 1;<\/code><\/pre>\n<p>\u4e0a\u8ff0 SQL \u8a9e\u53e5\u7528\u65bc\u5f9e users \u8868\u4e2d\u9078\u64c7 id \u70ba 1 \u7684\u7528\u6236\u3002\u7576\u9019\u689d\u8a9e\u53e5\u88ab\u57f7\u884c\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u6839\u64da\u5176\u9396\u7684\u7b56\u7565\u4f86\u6c7a\u5b9a\u662f\u5426\u9700\u8981\u52a0\u9396\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8e%96%e7%9a%84%e9%a1%9e%e5%9e%8b-XHBDpJzByq\">\u6578\u64da\u5eab\u9396\u7684\u985e\u578b<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u9396\u662f\u7528\u4f86\u4fdd\u8b77\u6578\u64da\u7684\u4e00\u7a2e\u6a5f\u5236\uff0c\u4ee5\u9632\u6b62\u540c\u6642\u8a2a\u554f\u5c0e\u81f4\u7684\u6578\u64da\u4e0d\u4e00\u81f4\u3002\u4e3b\u8981\u7684\u9396\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u5171\u4eab\u9396\uff08Shared Lock\uff09<\/strong>\uff1a\u5141\u8a31\u591a\u500b\u4e8b\u52d9\u540c\u6642\u8b80\u53d6\u6578\u64da\uff0c\u4f46\u4e0d\u5141\u8a31\u4fee\u6539\u3002<\/li>\n<li><strong>\u6392\u4ed6\u9396\uff08Exclusive Lock\uff09<\/strong>\uff1a\u53ea\u5141\u8a31\u4e00\u500b\u4e8b\u52d9\u8b80\u53d6\u548c\u4fee\u6539\u6578\u64da\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u8a2a\u554f\u3002<\/li>\n<li><strong>\u610f\u5411\u9396\uff08Intent Lock\uff09<\/strong>\uff1a\u7528\u65bc\u8868\u660e\u4e00\u500b\u4e8b\u52d9\u6253\u7b97\u5728\u67d0\u500b\u5c64\u7d1a\u4e0a\u52a0\u9396\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%8e%96%e7%9a%84%e5%8a%a0%e8%bc%89%e6%83%85%e6%b3%81-XHBDpJzByq\">\u9396\u7684\u52a0\u8f09\u60c5\u6cc1<\/h2>\n<p>\u5728\u57f7\u884c SQL \u8a9e\u53e5\u6642\uff0c\u6578\u64da\u5eab\u7cfb\u7d71\u6703\u6839\u64da\u7576\u524d\u7684\u4e8b\u52d9\u72c0\u614b\u548c\u9396\u7684\u985e\u578b\u4f86\u6c7a\u5b9a\u662f\u5426\u52a0\u9396\u3002\u4f8b\u5982\uff0c\u7576\u57f7\u884c\u4e00\u689d SELECT \u8a9e\u53e5\u6642\uff0c\u5982\u679c\u8a72\u8a9e\u53e5\u9700\u8981\u8b80\u53d6\u7684\u6578\u64da\u6b63\u5728\u88ab\u5176\u4ed6\u4e8b\u52d9\u4fee\u6539\uff0c\u5247\u53ef\u80fd\u6703\u52a0\u4e0a\u5171\u4eab\u9396\u6216\u6392\u4ed6\u9396\u3002<\/p>\n<h3 id=\"%e9%8e%96%e7%9a%84%e5%bd%b1%e9%9f%bf-XHBDpJzByq\">\u9396\u7684\u5f71\u97ff<\/h3>\n<p>\u9396\u7684\u4f7f\u7528\u96d6\u7136\u80fd\u5920\u4fdd\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u4f46\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u554f\u984c\uff0c\u5982\u6b7b\u9396\u548c\u963b\u585e\u3002\u9762\u8a66\u4e2d\uff0c\u5019\u9078\u4eba\u61c9\u8a72\u80fd\u5920\u8b58\u5225\u9019\u4e9b\u554f\u984c\u4e26\u63d0\u51fa\u89e3\u6c7a\u65b9\u6848\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u9069\u7576\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6e1b\u5c11\u9396\u7684\u7af6\u722d\u3002<\/p>\n<h2 id=\"%e9%9d%a2%e8%a9%a6%e4%b8%ad%e7%9a%84%e6%87%89%e7%94%a8-XHBDpJzByq\">\u9762\u8a66\u4e2d\u7684\u61c9\u7528<\/h2>\n<p>\u5728\u7f8e\u5718\u7684\u9762\u8a66\u4e2d\uff0c\u9762\u8a66\u5b98\u53ef\u80fd\u6703\u8981\u6c42\u5019\u9078\u4eba\u64b0\u5beb\u4e00\u689d SQL \u8a9e\u53e5\uff0c\u7136\u5f8c\u8a62\u554f\u5728\u57f7\u884c\u8a72\u8a9e\u53e5\u6642\u6703\u52a0\u4e0a\u54ea\u4e9b\u9396\u3002\u5019\u9078\u4eba\u61c9\u8a72\u80fd\u5920\u6e05\u695a\u5730\u89e3\u91cb\u5176 SQL \u8a9e\u53e5\u7684\u57f7\u884c\u904e\u7a0b\uff0c\u4ee5\u53ca\u5728\u4e0d\u540c\u60c5\u6cc1\u4e0b\u53ef\u80fd\u51fa\u73fe\u7684\u9396\u985e\u578b\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e5%95%8f%e9%a1%8c-XHBDpJzByq\">\u793a\u4f8b\u554f\u984c<\/h3>\n<p>\u5047\u8a2d\u9762\u8a66\u5b98\u8981\u6c42\u4f60\u64b0\u5beb\u4e00\u689d\u66f4\u65b0\u7528\u6236\u4fe1\u606f\u7684 SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE users SET name = 'John' WHERE id = 1;<\/code><\/pre>\n<p>\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u5019\u9078\u4eba\u61c9\u8a72\u80fd\u5920\u6307\u51fa\uff0c\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u6642\u6703\u52a0\u4e0a\u6392\u4ed6\u9396\uff0c\u56e0\u70ba\u8a72\u8a9e\u53e5\u6703\u4fee\u6539\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-XHBDpJzByq\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u9762\u8a66\u4e2d\uff0c\u80fd\u5920\u64b0\u5beb SQL \u8a9e\u53e5\u4e26\u89e3\u91cb\u5176\u9396\u7684\u6a5f\u5236\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u5c55\u793a\u4e86\u5019\u9078\u4eba\u7684\u6280\u8853\u80fd\u529b\uff0c\u9084\u986f\u793a\u4e86\u4ed6\u5011\u5c0d\u6578\u64da\u5eab\u7ba1\u7406\u7684\u6df1\u5165\u7406\u89e3\u3002\u5c0d\u65bc\u5e0c\u671b\u5728\u6578\u64da\u5eab\u9818\u57df\u767c\u5c55\u7684\u5c08\u696d\u4eba\u58eb\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u4e9b\u77e5\u8b58\u5c07\u6709\u52a9\u65bc\u4ed6\u5011\u5728\u8077\u696d\u751f\u6daf\u4e2d\u53d6\u5f97\u6210\u529f\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u53ca\u5176\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u7684\u61c9\u7528\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7f8e\u5718\u9762\u8a66\u4e2d\uff0c\u8003\u751f\u9700\u64b0\u5beb SQL \u8a9e\u53e5\u4e26\u89e3\u91cb\u6240\u52a0\u9396\u7684\u985e\u578b\uff0c\u8003\u5bdf\u6578\u64da\u5eab\u77e5\u8b58\u8207\u9396\u6a5f\u5236\u7406\u89e3\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-168889","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168889","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=168889"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168889\/revisions"}],"predecessor-version":[{"id":168890,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168889\/revisions\/168890"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}