{"id":77420,"date":"2024-10-16T10:45:19","date_gmt":"2024-10-16T02:45:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/77420\/"},"modified":"2024-10-16T10:45:19","modified_gmt":"2024-10-16T02:45:19","slug":"mysql%e6%b8%b8%e6%a8%99%e7%9a%84%e4%bd%bf%e7%94%a8%e7%ad%86%e8%a8%98%e5%a4%a7%e5%85%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/77420\/","title":{"rendered":"MySQL\u6e38\u6a19\u7684\u4f7f\u7528\u7b46\u8a18\u5927\u5168"},"content":{"rendered":"<h1 id=\"mysql%e6%b8%b8%e6%a8%99%e7%9a%84%e4%bd%bf%e7%94%a8%e7%ad%86%e8%a8%98%e5%a4%a7%e5%85%a8-RoWvsAmehh\">MySQL\u6e38\u6a19\u7684\u4f7f\u7528\u7b46\u8a18\u5927\u5168<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6e38\u6a19\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728MySQL\u4e2d\u3002\u6e38\u6a19\u5141\u8a31\u958b\u767c\u8005\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\uff0c\u9019\u5728\u9700\u8981\u5c0d\u6bcf\u4e00\u884c\u9032\u884c\u7279\u5b9a\u64cd\u4f5c\u6642\u975e\u5e38\u6709\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u6e38\u6a19\u7684\u4f7f\u7528\uff0c\u5305\u62ec\u5176\u5b9a\u7fa9\u3001\u985e\u578b\u3001\u5275\u5efa\u3001\u4f7f\u7528\u53ca\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%b8%b8%e6%a8%99%ef%bc%9f-RoWvsAmehh\">\u4ec0\u9ebc\u662f\u6e38\u6a19\uff1f<\/h2>\n<p>\u6e38\u6a19\u662f\u4e00\u7a2e\u8cc7\u6599\u5eab\u5c0d\u8c61\uff0c\u7528\u65bc\u5728\u67e5\u8a62\u7d50\u679c\u96c6\u4e2d\u9010\u884c\u8a2a\u554f\u8cc7\u6599\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u65b9\u6cd5\u4f86\u904d\u6b77\u67e5\u8a62\u7d50\u679c\uff0c\u4e26\u5c0d\u6bcf\u4e00\u884c\u57f7\u884c\u64cd\u4f5c\u3002\u6e38\u6a19\u901a\u5e38\u7528\u65bc\u9700\u8981\u9010\u884c\u8655\u7406\u7684\u60c5\u6cc1\uff0c\u4f8b\u5982\u5728\u5b58\u5132\u904e\u7a0b\u4e2d\u9032\u884c\u8907\u96dc\u7684\u8a08\u7b97\u6216\u66f4\u65b0\u3002<\/p>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e9%a1%9e%e5%9e%8b-RoWvsAmehh\">\u6e38\u6a19\u7684\u985e\u578b<\/h2>\n<ul>\n<li><strong>\u975c\u614b\u6e38\u6a19\uff1a<\/strong>\u9019\u7a2e\u6e38\u6a19\u5728\u6253\u958b\u6642\u6703\u8907\u88fd\u67e5\u8a62\u7d50\u679c\uff0c\u4e26\u4e14\u4e0d\u6703\u96a8\u8457\u57fa\u790e\u8cc7\u6599\u7684\u8b8a\u5316\u800c\u8b8a\u5316\u3002<\/li>\n<li><strong>\u52d5\u614b\u6e38\u6a19\uff1a<\/strong>\u9019\u7a2e\u6e38\u6a19\u6703\u96a8\u8457\u57fa\u790e\u8cc7\u6599\u7684\u8b8a\u5316\u800c\u66f4\u65b0\uff0c\u80fd\u5920\u53cd\u6620\u6700\u65b0\u7684\u8cc7\u6599\u72c0\u614b\u3002<\/li>\n<li><strong>\u5feb\u7167\u6e38\u6a19\uff1a<\/strong>\u9019\u7a2e\u6e38\u6a19\u5728\u6253\u958b\u6642\u6703\u6355\u6349\u7576\u524d\u7684\u8cc7\u6599\u72c0\u614b\uff0c\u4e26\u5728\u6e38\u6a19\u7684\u751f\u547d\u9031\u671f\u5167\u4fdd\u6301\u4e0d\u8b8a\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e6%b8%b8%e6%a8%99-RoWvsAmehh\">\u5275\u5efa\u6e38\u6a19<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u5275\u5efa\u6e38\u6a19\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>DELIMITER \/\/\nCREATE PROCEDURE example_procedure()\nBEGIN\n    DECLARE done INT DEFAULT FALSE;\n    DECLARE example_column VARCHAR(255);\n    \n    DECLARE example_cursor CURSOR FOR \n        SELECT column_name FROM example_table;\n    \n    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;\n\n    OPEN example_cursor;\n\n    read_loop: LOOP\n        FETCH example_cursor INTO example_column;\n        IF done THEN\n            LEAVE read_loop;\n        END IF;\n        -- \u5728\u9019\u88e1\u53ef\u4ee5\u5c0d\u6bcf\u4e00\u884c\u9032\u884c\u64cd\u4f5c\n        SELECT example_column;\n    END LOOP;\n\n    CLOSE example_cursor;\nEND \/\/\nDELIMITER ;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99-RoWvsAmehh\">\u4f7f\u7528\u6e38\u6a19<\/h2>\n<p>\u4f7f\u7528\u6e38\u6a19\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<ol>\n<li><strong>\u5ba3\u544a\u6e38\u6a19\uff1a<\/strong>\u4f7f\u7528 <code>DECLARE<\/code> \u8a9e\u53e5\u4f86\u5ba3\u544a\u6e38\u6a19\uff0c\u4e26\u6307\u5b9a\u8981\u67e5\u8a62\u7684SQL\u8a9e\u53e5\u3002<\/li>\n<li><strong>\u6253\u958b\u6e38\u6a19\uff1a<\/strong>\u4f7f\u7528 <code>OPEN<\/code> \u8a9e\u53e5\u4f86\u6253\u958b\u6e38\u6a19\uff0c\u9019\u6a23\u5c31\u53ef\u4ee5\u958b\u59cb\u5f9e\u4e2d\u63d0\u53d6\u8cc7\u6599\u3002<\/li>\n<li><strong>\u63d0\u53d6\u8cc7\u6599\uff1a<\/strong>\u4f7f\u7528 <code>FETCH<\/code> \u8a9e\u53e5\u4f86\u9010\u884c\u63d0\u53d6\u8cc7\u6599\uff0c\u4e26\u5c07\u5176\u5b58\u5132\u5728\u8b8a\u6578\u4e2d\u3002<\/li>\n<li><strong>\u95dc\u9589\u6e38\u6a19\uff1a<\/strong>\u5728\u5b8c\u6210\u64cd\u4f5c\u5f8c\uff0c\u4f7f\u7528 <code>CLOSE<\/code> \u8a9e\u53e5\u4f86\u95dc\u9589\u6e38\u6a19\uff0c\u91cb\u653e\u8cc7\u6e90\u3002<\/li>\n<\/ol>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-RoWvsAmehh\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u6e38\u6a19\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u6e38\u6a19\u6703\u4f54\u7528\u7cfb\u7d71\u8cc7\u6e90\uff0c\u56e0\u6b64\u61c9\u8a72\u5728\u4e0d\u518d\u9700\u8981\u6642\u53ca\u6642\u95dc\u9589\u3002<\/li>\n<li>\u904e\u5ea6\u4f7f\u7528\u6e38\u6a19\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u8cc7\u6599\u6642\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u6e38\u6a19\u6642\uff0c\u61c9\u8a72\u8003\u616e\u4f7f\u7528\u6279\u91cf\u64cd\u4f5c\u4f86\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-RoWvsAmehh\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u6e38\u6a19\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\u3002\u96d6\u7136\u6e38\u6a19\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u8981\u8b39\u614e\uff0c\u4ee5\u907f\u514d\u6027\u80fd\u554f\u984c\u3002\u4e86\u89e3\u6e38\u6a19\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\uff0c\u5c0d\u65bc\u958b\u767c\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u61c9\u7528\u7a0b\u5f0f\u81f3\u95dc\u91cd\u8981\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\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f\u5176\u4ed6\u96f2\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u6e38\u6a19\u7684\u4f7f\u7528\u6280\u5de7\u8207\u7bc4\u4f8b\uff0c\u5168\u9762\u638c\u63e1\u6e38\u6a19\u64cd\u4f5c\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u8207\u9748\u6d3b\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-77420","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77420","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=77420"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77420\/revisions"}],"predecessor-version":[{"id":77421,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/77420\/revisions\/77421"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=77420"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=77420"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=77420"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}