{"id":179306,"date":"2024-11-09T00:43:19","date_gmt":"2024-11-08T16:43:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/179306\/"},"modified":"2024-11-09T00:43:19","modified_gmt":"2024-11-08T16:43:19","slug":"%e5%a6%82%e4%bd%95%e7%94%a8-c-%e8%aa%9e%e8%a8%80%e7%9b%a3%e6%8e%a7-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%ef%bc%9f-c-%e7%9b%a3%e6%8e%a7-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/179306\/","title":{"rendered":"\u5982\u4f55\u7528 C \u8a9e\u8a00\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\uff1f (c \u76e3\u63a7 sql \u6578\u64da\u5eab\u9023\u63a5)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%94%a8-c-%e8%aa%9e%e8%a8%80%e7%9b%a3%e6%8e%a7-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%ef%bc%9f-YBIGBPLlEW\">\u5982\u4f55\u7528 C \u8a9e\u8a00\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\uff1f<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f01\u696d\u61c9\u7528\u9084\u662f\u500b\u4eba\u9805\u76ee\uff0c\u76e3\u63a7 SQL \u6578\u64da\u5eab\u7684\u9023\u63a5\u72c0\u614b\u90fd\u662f\u78ba\u4fdd\u7cfb\u7d71\u6b63\u5e38\u904b\u884c\u7684\u95dc\u9375\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 C \u8a9e\u8a00\u4f86\u76e3\u63a7 SQL \u6578\u64da\u5eab\u7684\u9023\u63a5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%9b%a3%e6%8e%a7-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%ef%bc%9f-YBIGBPLlEW\">\u70ba\u4ec0\u9ebc\u9700\u8981\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\uff1f<\/h2>\n<p>\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\u7684\u539f\u56e0\u6709\u5f88\u591a\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u512a\u5316\uff1a<\/strong>\u901a\u904e\u76e3\u63a7\u9023\u63a5\uff0c\u53ef\u4ee5\u8b58\u5225\u6027\u80fd\u74f6\u9838\uff0c\u5f9e\u800c\u9032\u884c\u512a\u5316\u3002<\/li>\n<li><strong>\u6545\u969c\u6392\u9664\uff1a<\/strong>\u7576\u6578\u64da\u5eab\u51fa\u73fe\u554f\u984c\u6642\uff0c\u53ca\u6642\u7684\u76e3\u63a7\u53ef\u4ee5\u5e6b\u52a9\u5feb\u901f\u5b9a\u4f4d\u554f\u984c\u3002<\/li>\n<li><strong>\u5b89\u5168\u6027\uff1a<\/strong>\u76e3\u63a7\u9023\u63a5\u53ef\u4ee5\u6aa2\u6e2c\u5230\u672a\u7d93\u6388\u6b0a\u7684\u8a2a\u554f\u6216\u7570\u5e38\u884c\u70ba\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8-c-%e8%aa%9e%e8%a8%80%e7%9b%a3%e6%8e%a7-sql-%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%ad%a5%e9%a9%9f-YBIGBPLlEW\">\u4f7f\u7528 C \u8a9e\u8a00\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\u7684\u57fa\u672c\u6b65\u9a5f<\/h2>\n<p>\u4f7f\u7528 C \u8a9e\u8a00\u4f86\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\uff0c\u901a\u5e38\u9700\u8981\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%ae%89%e8%a3%9d%e5%bf%85%e8%a6%81%e7%9a%84%e5%ba%ab-YBIGBPLlEW\">1. \u5b89\u88dd\u5fc5\u8981\u7684\u5eab<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u5b89\u88dd\u9069\u5408\u60a8\u6240\u4f7f\u7528\u7684 SQL \u6578\u64da\u5eab\u7684 C \u8a9e\u8a00\u5eab\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc MySQL \u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 MySQL C API\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88dd\uff1a<\/p>\n<pre><code>sudo apt-get install libmysqlclient-dev<\/code><\/pre>\n<h3 id=\"2-%e9%80%a3%e6%8e%a5%e5%88%b0%e6%95%b8%e6%93%9a%e5%ba%ab-YBIGBPLlEW\">2. \u9023\u63a5\u5230\u6578\u64da\u5eab<\/h3>\n<p>\u5728 C \u8a9e\u8a00\u4e2d\uff0c\u60a8\u9700\u8981\u4f7f\u7528\u76f8\u61c9\u7684 API \u4f86\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>#include \n#include \n#include \n\nint main() {\n    MYSQL *conn;\n    conn = mysql_init(NULL);\n\n    if (conn == NULL) {\n        fprintf(stderr, \"mysql_init() failedn\");\n        return EXIT_FAILURE;\n    }\n\n    if (mysql_real_connect(conn, \"localhost\", \"user\", \"password\", \"database\", 0, NULL, 0) == NULL) {\n        fprintf(stderr, \"mysql_real_connect() failedn\");\n        mysql_close(conn);\n        return EXIT_FAILURE;\n    }\n\n    printf(\"Connected to database successfully!n\");\n    mysql_close(conn);\n    return EXIT_SUCCESS;\n}<\/code><\/pre>\n<h3 id=\"3-%e7%9b%a3%e6%8e%a7%e9%80%a3%e6%8e%a5%e7%8b%80%e6%85%8b-YBIGBPLlEW\">3. \u76e3\u63a7\u9023\u63a5\u72c0\u614b<\/h3>\n<p>\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u9023\u63a5\u72c0\u614b\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u67e5\u8a62\u7576\u524d\u7684\u9023\u63a5\u6578\u91cf\uff1a<\/p>\n<pre><code>if (mysql_query(conn, \"SHOW STATUS LIKE 'Threads_connected'\")) {\n    fprintf(stderr, \"SHOW STATUS failed. Error: %sn\", mysql_error(conn));\n    return EXIT_FAILURE;\n}\n\nMYSQL_RES *result = mysql_store_result(conn);\nMYSQL_ROW row;\n\nwhile ((row = mysql_fetch_row(result))) {\n    printf(\"Threads_connected: %sn\", row[1]);\n}\n\nmysql_free_result(result);<\/code><\/pre>\n<h3 id=\"4-%e5%ae%9a%e6%9c%9f%e6%aa%a2%e6%9f%a5%e9%80%a3%e6%8e%a5-YBIGBPLlEW\">4. \u5b9a\u671f\u6aa2\u67e5\u9023\u63a5<\/h3>\n<p>\u70ba\u4e86\u6301\u7e8c\u76e3\u63a7\uff0c\u60a8\u53ef\u4ee5\u5c07\u4e0a\u8ff0\u4ee3\u78bc\u653e\u5165\u4e00\u500b\u5faa\u74b0\u4e2d\uff0c\u4e26\u8a2d\u7f6e\u9069\u7576\u7684\u5ef6\u9072\u6642\u9593\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 <code>sleep()<\/code> \u51fd\u6578\u4f86\u6bcf\u9694\u5e7e\u79d2\u6aa2\u67e5\u4e00\u6b21\u9023\u63a5\u72c0\u614b\uff1a<\/p>\n<pre><code>#include \n\nwhile (1) {\n    \/\/ \u76e3\u63a7\u4ee3\u78bc\n    sleep(5); \/\/ \u6bcf5\u79d2\u6aa2\u67e5\u4e00\u6b21\n}<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-YBIGBPLlEW\">\u7d50\u8ad6<\/h2>\n<p>\u4f7f\u7528 C \u8a9e\u8a00\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\u662f\u4e00\u500b\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u53ca\u6642\u767c\u73fe\u554f\u984c\u4e26\u9032\u884c\u512a\u5316\u3002\u901a\u904e\u5b89\u88dd\u5fc5\u8981\u7684\u5eab\u3001\u5efa\u7acb\u6578\u64da\u5eab\u9023\u63a5\u3001\u57f7\u884c\u67e5\u8a62\u4ee5\u53ca\u5b9a\u671f\u6aa2\u67e5\u9023\u63a5\u72c0\u614b\uff0c\u60a8\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528 C \u8a9e\u8a00\u76e3\u63a7 SQL \u6578\u64da\u5eab\u9023\u63a5\uff0c\u638c\u63e1\u9023\u63a5\u72c0\u614b\u3001\u6027\u80fd\u6307\u6a19\u53ca\u932f\u8aa4\u8655\u7406\u7684\u6280\u5de7\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-179306","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179306","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=179306"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179306\/revisions"}],"predecessor-version":[{"id":179307,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/179306\/revisions\/179307"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=179306"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=179306"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=179306"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}