{"id":60201,"date":"2024-10-13T00:53:13","date_gmt":"2024-10-12T16:53:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60201\/"},"modified":"2024-10-13T00:53:13","modified_gmt":"2024-10-12T16:53:13","slug":"c%e8%aa%9e%e8%a8%80%e4%b8%ad%e7%9a%84sql%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e8%a9%b3%e8%a7%a3-c-sql%e6%95%b8%e6%93%9a%e5%ba%ab%e6%93%8d%e4%bd%9c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60201\/","title":{"rendered":"C\u8a9e\u8a00\u4e2d\u7684SQL\u6578\u64da\u5eab\u64cd\u4f5c\u6280\u5de7\u8a73\u89e3 (c sql\u6578\u64da\u5eab\u64cd\u4f5c)"},"content":{"rendered":"

C\u8a9e\u8a00\u4e2d\u7684SQL\u6578\u64da\u5eab\u64cd\u4f5c\u6280\u5de7\u8a73\u89e3<\/h1>\n

\u5728\u7576\u4eca\u7684\u8edf\u4ef6\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\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\u89c0\uff0c\u4f46\u5b83\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728C\u8a9e\u8a00\u4e2d\u9032\u884cSQL\u6578\u64da\u5eab\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n

1. C\u8a9e\u8a00\u8207SQL\u6578\u64da\u5eab\u7684\u9023\u63a5<\/h2>\n

\u5728C\u8a9e\u8a00\u4e2d\uff0c\u8207SQL\u6578\u64da\u5eab\u7684\u9023\u63a5\u901a\u5e38\u4f7f\u7528ODBC\uff08Open Database Connectivity\uff09\u6216\u7279\u5b9a\u6578\u64da\u5eab\u7684API\uff08\u5982MySQL\u7684C API\uff09\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528MySQL C API\u9023\u63a5\u6578\u64da\u5eab\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n

#include <mysql\/mysql.h>\n\nMYSQL *conn;\nconn = mysql_init(NULL);\n\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
2. \u57f7\u884cSQL\u67e5\u8a62<\/h2>\n
\u4e00\u65e6\u6210\u529f\u9023\u63a5\u5230\u6578\u64da\u5eab\uff0c\u5c31\u53ef\u4ee5\u57f7\u884cSQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u57f7\u884c\u67e5\u8a62\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n
if (mysql_query(conn, \"SELECT * FROM table_name\")) {\n    fprintf(stderr, \"SELECT * failed. Error: %sn\", mysql_error(conn));\n    mysql_close(conn);\n    return EXIT_FAILURE;\n}\n\nMYSQL_RES *result = mysql_store_result(conn);\nif (result == NULL) {\n    fprintf(stderr, \"mysql_store_result() failed. Error: %sn\", mysql_error(conn));\n    mysql_close(conn);\n    return EXIT_FAILURE;\n}\n<\/code><\/pre>\n
3. \u8655\u7406\u67e5\u8a62\u7d50\u679c<\/h2>\n
\u67e5\u8a62\u7d50\u679c\u53ef\u4ee5\u901a\u904e\u8fed\u4ee3MYSQL_RES\u7d50\u69cb\u4f86\u8655\u7406\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u904d\u6b77\u7d50\u679c\u96c6\u7684\u793a\u4f8b\uff1a<\/p>\n
MYSQL_ROW row;\nwhile ((row = mysql_fetch_row(result))) {\n    printf(\"%sn\", row[0]); \/\/ \u5047\u8a2d\u7b2c\u4e00\u5217\u662f\u6211\u5011\u9700\u8981\u7684\u6578\u64da\n}\nmysql_free_result(result);\n<\/code><\/pre>\n
4. \u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da<\/h2>\n
\u9664\u4e86\u67e5\u8a62\uff0cC\u8a9e\u8a00\u9084\u53ef\u4ee5\u7528\u4f86\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u9019\u4e9b\u64cd\u4f5c\u7684\u793a\u4f8b\uff1a<\/p>\n
\/\/ \u63d2\u5165\u6578\u64da\nif (mysql_query(conn, \"INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')\")) {\n    fprintf(stderr, \"INSERT failed. Error: %sn\", mysql_error(conn));\n}\n\n\/\/ \u66f4\u65b0\u6578\u64da\nif (mysql_query(conn, \"UPDATE table_name SET column1 = 'new_value' WHERE condition\")) {\n    fprintf(stderr, \"UPDATE failed. Error: %sn\", mysql_error(conn));\n}\n\n\/\/ \u522a\u9664\u6578\u64da\nif (mysql_query(conn, \"DELETE FROM table_name WHERE condition\")) {\n    fprintf(stderr, \"DELETE failed. Error: %sn\", mysql_error(conn));\n}\n<\/code><\/pre>\n
5. \u932f\u8aa4\u8655\u7406<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u932f\u8aa4\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4f7f\u7528mysql_error()\u51fd\u6578\u53ef\u4ee5\u7372\u53d6\u6700\u8fd1\u4e00\u6b21\u64cd\u4f5c\u7684\u932f\u8aa4\u4fe1\u606f\uff0c\u9019\u5c0d\u65bc\u8abf\u8a66\u975e\u5e38\u6709\u5e6b\u52a9\u3002<\/p>\n
6. \u91cb\u653e\u8cc7\u6e90<\/h2>\n
\u5728\u5b8c\u6210\u6240\u6709\u64cd\u4f5c\u5f8c\uff0c\u8a18\u5f97\u91cb\u653e\u8cc7\u6e90\uff0c\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\uff1a<\/p>\n
mysql_close(conn);\n<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5728C\u8a9e\u8a00\u4e2d\u9032\u884cSQL\u6578\u64da\u5eab\u64cd\u4f5c\u96d6\u7136\u9700\u8981\u4e00\u4e9b\u984d\u5916\u7684\u6b65\u9a5f\uff0c\u4f46\u901a\u904e\u4f7f\u7528\u5408\u9069\u7684API\u548c\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u3002\u9019\u4e9b\u6280\u5de7\u4e0d\u50c5\u80fd\u63d0\u9ad8\u958b\u767c\u6548\u7387\uff0c\u9084\u80fd\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u5b89\u5168\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u3002\u7121\u8ad6\u662f \u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22C\u8a9e\u8a00\u4e2dSQL\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6280\u5de7\uff0c\u5b78\u7fd2\u5982\u4f55\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u67e5\u8a62\u3001\u63d2\u5165\u548c\u7ba1\u7406\uff0c\u63d0\u5347\u7de8\u7a0b\u80fd\u529b\u3002<\/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-60201","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60201","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=60201"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60201\/revisions"}],"predecessor-version":[{"id":60202,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60201\/revisions\/60202"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}