{"id":60167,"date":"2024-10-13T00:36:23","date_gmt":"2024-10-12T16:36:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60167\/"},"modified":"2024-10-13T00:36:23","modified_gmt":"2024-10-12T16:36:23","slug":"c%e8%aa%9e%e8%a8%80%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84crud%e6%93%8d%e4%bd%9c-c%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%a2%9e%e5%88%aa%e6%94%b9%e6%9f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60167\/","title":{"rendered":"C\u8a9e\u8a00\u5be6\u73fe\u6578\u64da\u5eab\u7684CRUD\u64cd\u4f5c (c\u5c0d\u6578\u64da\u5eab\u7684\u589e\u522a\u6539\u67e5)"},"content":{"rendered":"<h1 id=\"c%e8%aa%9e%e8%a8%80%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84crud%e6%93%8d%e4%bd%9c-c%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%a2%9e%e5%88%aa%e6%94%b9%e6%9f%a5-KwwZIcSjKY\">C\u8a9e\u8a00\u5be6\u73fe\u6578\u64da\u5eab\u7684CRUD\u64cd\u4f5c (C\u5c0d\u6578\u64da\u5eab\u7684\u589e\u522a\u6539\u67e5)<\/h1>\n<p>\u5728\u73fe\u4ee3\u8edf\u9ad4\u958b\u767c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u64cd\u4f5c\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002CRUD\u64cd\u4f5c\uff0c\u5373\u5275\u5efa\uff08Create\uff09\u3001\u8b80\u53d6\uff08Read\uff09\u3001\u66f4\u65b0\uff08Update\uff09\u548c\u522a\u9664\uff08Delete\uff09\uff0c\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u57fa\u672c\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u4f86\u5be6\u73fe\u9019\u4e9b\u64cd\u4f5c\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u4ee3\u78bc\u793a\u4f8b\u3002<\/p>\n<h2 id=\"1-%e7%92%b0%e5%a2%83%e6%ba%96%e5%82%99-KwwZIcSjKY\">1. \u74b0\u5883\u6e96\u5099<\/h2>\n<p>\u5728\u958b\u59cb\u4e4b\u524d\uff0c\u60a8\u9700\u8981\u78ba\u4fdd\u60a8\u7684\u958b\u767c\u74b0\u5883\u4e2d\u5df2\u5b89\u88dd\u4e86C\u8a9e\u8a00\u7de8\u8b6f\u5668\u548c\u76f8\u61c9\u7684\u6578\u64da\u5eab\u9a45\u52d5\u3002\u9019\u88e1\u6211\u5011\u4ee5MySQL\u6578\u64da\u5eab\u70ba\u4f8b\uff0c\u4f7f\u7528MySQL C API\u4f86\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/p>\n<h3 id=\"1-1-%e5%ae%89%e8%a3%9dmysql-c-api-KwwZIcSjKY\">1.1 \u5b89\u88ddMySQL C API<\/h3>\n<p>\u5728Linux\u7cfb\u7d71\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5b89\u88ddMySQL\u958b\u767c\u5305\uff1a<\/p>\n<pre><code>sudo apt-get install libmysqlclient-dev<\/code><\/pre>\n<h2 id=\"2-%e9%80%a3%e6%8e%a5%e6%95%b8%e6%93%9a%e5%ba%ab-KwwZIcSjKY\">2. \u9023\u63a5\u6578\u64da\u5eab<\/h2>\n<p>\u5728\u9032\u884cCRUD\u64cd\u4f5c\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u9023\u63a5MySQL\u6578\u64da\u5eab\u7684\u57fa\u672c\u4ee3\u78bc\uff1a<\/p>\n<pre><code>#include \n#include \n#include \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=\"3-crud%e6%93%8d%e4%bd%9c%e5%af%a6%e7%8f%be-KwwZIcSjKY\">3. CRUD\u64cd\u4f5c\u5be6\u73fe<\/h2>\n<h3 id=\"3-1-%e5%89%b5%e5%bb%ba%ef%bc%88create%ef%bc%89-KwwZIcSjKY\">3.1 \u5275\u5efa\uff08Create\uff09<\/h3>\n<p>\u5275\u5efa\u64cd\u4f5c\u901a\u5e38\u662f\u63d2\u5165\u6578\u64da\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u63d2\u5165\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>const char *query = \"INSERT INTO users (name, age) VALUES ('Alice', 30)\";\nif (mysql_query(conn, query)) {\n    fprintf(stderr, \"INSERT failed. Error: %sn\", mysql_error(conn));\n}\n<\/code><\/pre>\n<h3 id=\"3-2-%e8%ae%80%e5%8f%96%ef%bc%88read%ef%bc%89-KwwZIcSjKY\">3.2 \u8b80\u53d6\uff08Read\uff09<\/h3>\n<p>\u8b80\u53d6\u64cd\u4f5c\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u67e5\u8a62\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>if (mysql_query(conn, \"SELECT * FROM users\")) {\n    fprintf(stderr, \"SELECT failed. Error: %sn\", mysql_error(conn));\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}\n\nwhile (MYSQL_ROW row = mysql_fetch_row(result)) {\n    printf(\"User: %s, Age: %sn\", row[0], row[1]);\n}\nmysql_free_result(result);\n<\/code><\/pre>\n<h3 id=\"3-3-%e6%9b%b4%e6%96%b0%ef%bc%88update%ef%bc%89-KwwZIcSjKY\">3.3 \u66f4\u65b0\uff08Update\uff09<\/h3>\n<p>\u66f4\u65b0\u64cd\u4f5c\u7528\u65bc\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u7684\u73fe\u6709\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u66f4\u65b0\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>const char *update_query = \"UPDATE users SET age = 31 WHERE name = 'Alice'\";\nif (mysql_query(conn, update_query)) {\n    fprintf(stderr, \"UPDATE failed. Error: %sn\", mysql_error(conn));\n}\n<\/code><\/pre>\n<h3 id=\"3-4-%e5%88%aa%e9%99%a4%ef%bc%88delete%ef%bc%89-KwwZIcSjKY\">3.4 \u522a\u9664\uff08Delete\uff09<\/h3>\n<p>\u522a\u9664\u64cd\u4f5c\u7528\u65bc\u5f9e\u6578\u64da\u5eab\u4e2d\u79fb\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u522a\u9664\u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>const char *delete_query = \"DELETE FROM users WHERE name = 'Alice'\";\nif (mysql_query(conn, delete_query)) {\n    fprintf(stderr, \"DELETE failed. Error: %sn\", mysql_error(conn));\n}\n<\/code><\/pre>\n<h2 id=\"4-%e9%97%9c%e9%96%89%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%a3%e6%8e%a5-KwwZIcSjKY\">4. \u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5<\/h2>\n<p>\u5b8c\u6210\u6240\u6709\u64cd\u4f5c\u5f8c\uff0c\u8a18\u5f97\u95dc\u9589\u6578\u64da\u5eab\u9023\u63a5\uff1a<\/p>\n<pre><code>mysql_close(conn);\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-KwwZIcSjKY\">\u7e3d\u7d50<\/h2>\n<p>\u672c\u6587\u4ecb\u7d39\u4e86\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u5be6\u73fe\u6578\u64da\u5eab\u7684CRUD\u64cd\u4f5c\uff0c\u5305\u62ec\u5275\u5efa\u3001\u8b80\u53d6\u3001\u66f4\u65b0\u548c\u522a\u9664\u3002\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u662f\u4efb\u4f55\u6578\u64da\u9a45\u52d5\u61c9\u7528\u7a0b\u5e8f\u7684\u6838\u5fc3\u3002\u900f\u904e\u4f7f\u7528MySQL C API\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u8207\u6578\u64da\u5eab\u9032\u884c\u4ea4\u4e92\uff0c\u5be6\u73fe\u5404\u7a2e\u529f\u80fd\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u90e8\u7f72\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\u5c0f\u578b\u9805\u76ee\u9084\u662f\u5927\u578b\u4f01\u696d\u61c9\u7528\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u4f7f\u7528C\u8a9e\u8a00\u5be6\u73fe\u6578\u64da\u5eab\u7684CRUD\u64cd\u4f5c\uff0c\u6db5\u84cb\u589e\u3001\u522a\u3001\u6539\u3001\u67e5\u7684\u57fa\u672c\u65b9\u6cd5\u8207\u5be6\u4f8b\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-60167","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60167","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=60167"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60167\/revisions"}],"predecessor-version":[{"id":60168,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60167\/revisions\/60168"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}