{"id":180672,"date":"2024-11-09T12:13:19","date_gmt":"2024-11-09T04:13:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180672\/"},"modified":"2024-11-09T12:13:20","modified_gmt":"2024-11-09T04:13:20","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3c%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-c-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180672\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3C\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u8a9e\u53e5 (c \u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u8a9e\u53e5)"},"content":{"rendered":"<h1 id=\"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3c%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-SaDLSseqHR\">\u6df1\u5165\u4e86\u89e3C\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u8a9e\u53e5<\/h1>\n<p>\u5728\u73fe\u4ee3\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u5df2\u7d93\u6210\u70ba\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u61c9\u7528\u9084\u662f\u5927\u578b\u7cfb\u7d71\uff0c\u6578\u64da\u5eab\u90fd\u626e\u6f14\u8457\u5b58\u5132\u548c\u7ba1\u7406\u6578\u64da\u7684\u91cd\u8981\u89d2\u8272\u3002C\u8a9e\u8a00\u4f5c\u70ba\u4e00\u7a2e\u5e95\u5c64\u7de8\u7a0b\u8a9e\u8a00\uff0c\u96d6\u7136\u4e0d\u5982\u9ad8\u7d1a\u8a9e\u8a00\u90a3\u6a23\u76f4\u63a5\u652f\u6301\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u4f46\u901a\u904e\u76f8\u61c9\u7684\u5eab\u548cAPI\uff0c\u6211\u5011\u4ecd\u7136\u53ef\u4ee5\u5be6\u73fe\u5c0d\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eC\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u8a9e\u53e5\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u5728C\u8a9e\u8a00\u4e2d\u9032\u884c\u6578\u64da\u5eab\u67e5\u8a62\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-SaDLSseqHR\">\u6578\u64da\u5eab\u67e5\u8a62\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6578\u64da\u5eab\u67e5\u8a62\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u7684\u904e\u7a0b\u3002\u67e5\u8a62\u8a9e\u53e5\u901a\u5e38\u4f7f\u7528\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff08SQL\uff09\u4f86\u7de8\u5beb\u3002\u689d\u4ef6\u67e5\u8a62\u5247\u662f\u6307\u5728\u67e5\u8a62\u4e2d\u6dfb\u52a0\u7279\u5b9a\u689d\u4ef6\uff0c\u4ee5\u904e\u6ffe\u51fa\u7b26\u5408\u8981\u6c42\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5f9e\u7528\u6236\u8868\u4e2d\u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u6b72\u7684\u7528\u6236\u3002<\/p>\n<h2 id=\"c%e8%aa%9e%e8%a8%80%e8%88%87%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e9%80%a3%e6%8e%a5-SaDLSseqHR\">C\u8a9e\u8a00\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5<\/h2>\n<p>\u5728C\u8a9e\u8a00\u4e2d\uff0c\u8207\u6578\u64da\u5eab\u7684\u9023\u63a5\u901a\u5e38\u4f9d\u8cf4\u65bc\u7b2c\u4e09\u65b9\u5eab\uff0c\u5982MySQL\u7684C API\u6216SQLite\u7684C\u63a5\u53e3\u3002\u9019\u4e9b\u5eab\u63d0\u4f9b\u4e86\u51fd\u6578\u4f86\u57f7\u884cSQL\u8a9e\u53e5\uff0c\u5305\u62ec\u689d\u4ef6\u67e5\u8a62\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8mysql-c-api%e9%80%b2%e8%a1%8c%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2-SaDLSseqHR\">\u4f7f\u7528MySQL C API\u9032\u884c\u689d\u4ef6\u67e5\u8a62<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528MySQL C API\u9032\u884c\u689d\u4ef6\u67e5\u8a62\u7684\u7c21\u55ae\u793a\u4f8b\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n#include &lt;mysql\/mysql.h&gt;\n\nint main() {\n    MYSQL *conn;\n    MYSQL_RES *res;\n    MYSQL_ROW row;\n\n    conn = mysql_init(NULL);\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    if (mysql_query(conn, \"SELECT * FROM users WHERE age &gt; 18\")) {\n        fprintf(stderr, \"SELECT * FROM users failed. Error: %sn\", mysql_error(conn));\n        mysql_close(conn);\n        return EXIT_FAILURE;\n    }\n\n    res = mysql_store_result(conn);\n    if (res == NULL) {\n        fprintf(stderr, \"mysql_store_result() failed. Error: %sn\", mysql_error(conn));\n        mysql_close(conn);\n        return EXIT_FAILURE;\n    }\n\n    while ((row = mysql_fetch_row(res)) != NULL) {\n        printf(\"%s %sn\", row[0], row[1]); \/\/ \u5047\u8a2d\u7b2c\u4e00\u5217\u662f\u7528\u6236\u540d\uff0c\u7b2c\u4e8c\u5217\u662f\u5e74\u9f61\n    }\n\n    mysql_free_result(res);\n    mysql_close(conn);\n    return EXIT_SUCCESS;\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u521d\u59cb\u5316MySQL\u9023\u63a5\uff0c\u7136\u5f8c\u4f7f\u7528<code>mysql_query<\/code>\u51fd\u6578\u57f7\u884c\u4e00\u500b\u689d\u4ef6\u67e5\u8a62\uff0c\u67e5\u8a62\u5e74\u9f61\u5927\u65bc18\u6b72\u7684\u7528\u6236\u3002\u67e5\u8a62\u7d50\u679c\u901a\u904e<code>mysql_store_result<\/code>\u7372\u53d6\uff0c\u4e26\u4f7f\u7528<code>mysql_fetch_row<\/code>\u9010\u884c\u8b80\u53d6\u6578\u64da\u3002<\/p>\n<h2 id=\"%e6%a2%9d%e4%bb%b6%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%b8%b8%e7%94%a8%e6%93%8d%e4%bd%9c%e7%ac%a6-SaDLSseqHR\">\u689d\u4ef6\u67e5\u8a62\u7684\u5e38\u7528\u64cd\u4f5c\u7b26<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u689d\u4ef6\u67e5\u8a62\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u64cd\u4f5c\u7b26\u4f86\u904e\u6ffe\u6578\u64da\uff0c\u5e38\u898b\u7684\u64cd\u4f5c\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>=<\/code>\uff1a\u7b49\u65bc<\/li>\n<li><code>&gt;<\/code>\uff1a\u5927\u65bc<\/li>\n<li><code>&lt;<\/code>\uff1a\u5c0f\u65bc<\/li>\n<li><code>&gt;=<\/code>\uff1a\u5927\u65bc\u7b49\u65bc<\/li>\n<li><code>&lt;=<\/code>\uff1a\u5c0f\u65bc\u7b49\u65bc<\/li>\n<li><code>!=<\/code>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><code>LIKE<\/code>\uff1a\u6a21\u7cca\u5339\u914d<\/li>\n<li><code>BETWEEN<\/code>\uff1a\u7bc4\u570d\u67e5\u8a62<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u64cd\u4f5c\u7b26\u53ef\u4ee5\u7d44\u5408\u4f7f\u7528\uff0c\u4ee5\u69cb\u5efa\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u572818\u523030\u6b72\u4e4b\u9593\u7684\u7528\u6236\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE age BETWEEN 18 AND 30;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SaDLSseqHR\">\u7e3d\u7d50<\/h2>\n<p>\u5728C\u8a9e\u8a00\u4e2d\u9032\u884c\u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u9700\u8981\u4f9d\u8cf4\u76f8\u61c9\u7684\u6578\u64da\u5eabAPI\uff0c\u901a\u904e\u7de8\u5bebSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\u6578\u64da\u7684\u6aa2\u7d22\u3002\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u9019\u4e9bAPI\u4ee5\u53caSQL\u7684\u57fa\u672c\u8a9e\u6cd5\uff0c\u5c07\u6709\u52a9\u65bc\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">VPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/code>\u53ef\u4ee5\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6d41\u66a2\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u4e86\u89e3C\u8a9e\u8a00\u4e2d\u7684\u6578\u64da\u5eab\u689d\u4ef6\u67e5\u8a62\u8a9e\u53e5\uff0c\u638c\u63e1\u5982\u4f55\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u548c\u904e\u6ffe\u6578\u64da\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-180672","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180672","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=180672"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180672\/revisions"}],"predecessor-version":[{"id":180673,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180672\/revisions\/180673"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180672"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180672"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}