{"id":174967,"date":"2024-11-08T01:16:22","date_gmt":"2024-11-07T17:16:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174967\/"},"modified":"2024-11-08T01:16:23","modified_gmt":"2024-11-07T17:16:23","slug":"%e5%a6%82%e4%bd%95%e7%a2%ba%e8%aa%8d%e4%bd%bf%e7%94%a8-c-%e8%aa%9e%e8%a8%80%e5%bb%ba%e7%ab%8b%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e6%a0%bc%e5%89%b5%e5%bb%ba%e6%88%90%e5%8a%9f%ef%bc%9f-c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174967\/","title":{"rendered":"\u5982\u4f55\u78ba\u8a8d\u4f7f\u7528 C \u8a9e\u8a00\u5efa\u7acb\u7684\u6578\u64da\u5eab\u8868\u683c\u5275\u5efa\u6210\u529f\uff1f (c \u6578\u64da\u5eab\u5efa\u7acb\u8868\u662f\u5426\u6210\u529f)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e7%a2%ba%e8%aa%8d%e4%bd%bf%e7%94%a8-c-%e8%aa%9e%e8%a8%80%e5%bb%ba%e7%ab%8b%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e6%a0%bc%e5%89%b5%e5%bb%ba%e6%88%90%e5%8a%9f%ef%bc%9f-QqgjQgspcw\">\u5982\u4f55\u78ba\u8a8d\u4f7f\u7528 C \u8a9e\u8a00\u5efa\u7acb\u7684\u6578\u64da\u5eab\u8868\u683c\u5275\u5efa\u6210\u529f\uff1f<\/h1>\n<p>\u5728\u4f7f\u7528 C \u8a9e\u8a00\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u78ba\u8a8d\u6578\u64da\u5eab\u8868\u683c\u662f\u5426\u6210\u529f\u5275\u5efa\u662f\u4e00\u500b\u91cd\u8981\u7684\u6b65\u9a5f\u3002\u9019\u4e0d\u50c5\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u907f\u514d\u5f8c\u7e8c\u64cd\u4f5c\u4e2d\u7684\u932f\u8aa4\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 C \u8a9e\u8a00\u4e2d\u6aa2\u67e5\u6578\u64da\u5eab\u8868\u683c\u7684\u5275\u5efa\u72c0\u614b\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-QqgjQgspcw\">\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728\u9032\u884c\u4efb\u4f55\u6578\u64da\u5eab\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u5efa\u7acb\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u7684\u793a\u4f8b\u4ee3\u78bc\uff1a<\/p>\n<pre><code>\n#include &lt;stdio.h&gt;\n#include &lt;mysql\/mysql.h&gt;\n\nMYSQL *conn;\nconn = mysql_init(NULL);\nif (conn == NULL) {\n    fprintf(stderr, \"mysql_init() failedn\");\n    return EXIT_FAILURE;\n}\n\nif (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<\/code><\/pre>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%a0%bc%e7%9a%84-sql-%e8%aa%9e%e5%8f%a5-QqgjQgspcw\">\u5275\u5efa\u8868\u683c\u7684 SQL \u8a9e\u53e5<\/h2>\n<p>\u5728\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u5275\u5efa\u8868\u683c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u5275\u5efa\u8868\u683c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nconst char *create_table_query = \"CREATE TABLE IF NOT EXISTS users (\"\n                                  \"id INT AUTO_INCREMENT PRIMARY KEY, \"\n                                  \"name VARCHAR(100), \"\n                                  \"email VARCHAR(100) UNIQUE)\";\nif (mysql_query(conn, create_table_query)) {\n    fprintf(stderr, \"CREATE TABLE failed. Error: %sn\", mysql_error(conn));\n    mysql_close(conn);\n    return EXIT_FAILURE;\n}\n<\/code><\/pre>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e8%a1%a8%e6%a0%bc%e5%89%b5%e5%bb%ba%e6%98%af%e5%90%a6%e6%88%90%e5%8a%9f-QqgjQgspcw\">\u6aa2\u67e5\u8868\u683c\u5275\u5efa\u662f\u5426\u6210\u529f<\/h2>\n<p>\u5728\u57f7\u884c\u5275\u5efa\u8868\u683c\u7684 SQL \u8a9e\u53e5\u5f8c\uff0c\u61c9\u8a72\u6aa2\u67e5\u8fd4\u56de\u7684\u7d50\u679c\u4ee5\u78ba\u8a8d\u8868\u683c\u662f\u5426\u6210\u529f\u5275\u5efa\u3002\u53ef\u4ee5\u901a\u904e\u6aa2\u67e5 mysql_query \u7684\u8fd4\u56de\u503c\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>\nif (mysql_query(conn, create_table_query)) {\n    fprintf(stderr, \"CREATE TABLE failed. Error: %sn\", mysql_error(conn));\n} else {\n    printf(\"Table created successfully.n\");\n}\n<\/code><\/pre>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e8%a1%a8%e6%a0%bc%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8-QqgjQgspcw\">\u67e5\u8a62\u8868\u683c\u662f\u5426\u5b58\u5728<\/h2>\n<p>\u9664\u4e86\u6aa2\u67e5\u5275\u5efa\u8868\u683c\u7684\u8fd4\u56de\u503c\u5916\uff0c\u9084\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u6578\u64da\u5eab\u4f86\u78ba\u8a8d\u8868\u683c\u662f\u5426\u5b58\u5728\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u8868\u683c\u662f\u5426\u5b58\u5728\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nconst char *check_table_query = \"SHOW TABLES LIKE 'users'\";\nif (mysql_query(conn, check_table_query)) {\n    fprintf(stderr, \"SHOW TABLES failed. Error: %sn\", mysql_error(conn));\n} else {\n    MYSQL_RES *result = mysql_store_result(conn);\n    if (result) {\n        if (mysql_num_rows(result) &gt; 0) {\n            printf(\"Table 'users' exists.n\");\n        } else {\n            printf(\"Table 'users' does not exist.n\");\n        }\n        mysql_free_result(result);\n    }\n}\n<\/code><\/pre>\n<h2 id=\"%e9%97%9c%e9%96%89%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-QqgjQgspcw\">\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5728\u5b8c\u6210\u6240\u6709\u64cd\u4f5c\u5f8c\uff0c\u8a18\u5f97\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\u4ee5\u91cb\u653e\u8cc7\u6e90\uff1a<\/p>\n<pre><code>\nmysql_close(conn);\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-QqgjQgspcw\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u4f7f\u7528 C \u8a9e\u8a00\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u78ba\u8a8d\u8868\u683c\u5275\u5efa\u6210\u529f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u901a\u904e\u6aa2\u67e5 SQL \u8a9e\u53e5\u7684\u8fd4\u56de\u503c\u548c\u67e5\u8a62\u8868\u683c\u662f\u5426\u5b58\u5728\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u548c\u6b63\u78ba\u6027\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u78ba\u8a8d\u4f7f\u7528 C \u8a9e\u8a00\u5efa\u7acb\u7684\u6578\u64da\u5eab\u8868\u683c\u662f\u5426\u6210\u529f\u5275\u5efa\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6b63\u78ba\u6027\u8207\u6709\u6548\u6027\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-174967","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174967","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=174967"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174967\/revisions"}],"predecessor-version":[{"id":174968,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174967\/revisions\/174968"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174967"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174967"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174967"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}