{"id":60463,"date":"2024-10-13T03:04:15","date_gmt":"2024-10-12T19:04:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60463\/"},"modified":"2024-10-13T03:04:15","modified_gmt":"2024-10-12T19:04:15","slug":"db2%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e4%b8%ad%e5%b0%8d%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60463\/","title":{"rendered":"DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u5c0d\u52d5\u614b\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6848"},"content":{"rendered":"<h1 id=\"db2%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e4%b8%ad%e5%b0%8d%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%96%b9%e6%a1%88-MCfAqxRwdh\">DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u5c0d\u52d5\u614b\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6848<\/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\u5728\u8655\u7406\u8907\u96dc\u67e5\u8a62\u548c\u591a\u884c\u7d50\u679c\u96c6\u6642\u3002DB2\u4f5c\u70baIBM\u7684\u4e00\u6b3e\u5f37\u5927\u8cc7\u6599\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u52d5\u614b\u6e38\u6a19\u7684\u529f\u80fd\uff0c\u8b93\u958b\u767c\u8005\u80fd\u5920\u9748\u6d3b\u5730\u64cd\u4f5c\u8cc7\u6599\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u5c0d\u52d5\u614b\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6848\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u548c\u5efa\u8b70\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%ef%bc%9f-MCfAqxRwdh\">\u4ec0\u9ebc\u662f\u52d5\u614b\u6e38\u6a19\uff1f<\/h2>\n<p>\u52d5\u614b\u6e38\u6a19\u662f\u4e00\u7a2e\u53ef\u4ee5\u5728\u7d50\u679c\u96c6\u4e0a\u9032\u884c\u96a8\u6a5f\u8a2a\u554f\u7684\u6e38\u6a19\u3002\u8207\u975c\u614b\u6e38\u6a19\u4e0d\u540c\uff0c\u52d5\u614b\u6e38\u6a19\u80fd\u5920\u53cd\u6620\u8cc7\u6599\u5eab\u4e2d\u8cc7\u6599\u7684\u5373\u6642\u8b8a\u5316\uff0c\u9019\u4f7f\u5f97\u5b83\u5728\u9700\u8981\u5373\u6642\u66f4\u65b0\u7684\u61c9\u7528\u5834\u666f\u4e2d\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%e7%9a%84%e7%89%b9%e6%80%a7-MCfAqxRwdh\">\u52d5\u614b\u6e38\u6a19\u7684\u7279\u6027<\/h2>\n<ul>\n<li><strong>\u5373\u6642\u6027\uff1a<\/strong>\u52d5\u614b\u6e38\u6a19\u80fd\u5920\u53cd\u6620\u8cc7\u6599\u7684\u5373\u6642\u8b8a\u5316\uff0c\u9069\u5408\u9700\u8981\u5373\u6642\u67e5\u8a62\u7684\u61c9\u7528\u3002<\/li>\n<li><strong>\u96a8\u6a5f\u8a2a\u554f\uff1a<\/strong>\u53ef\u4ee5\u96a8\u610f\u8a2a\u554f\u7d50\u679c\u96c6\u4e2d\u7684\u4efb\u4f55\u4e00\u884c\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u96a8\u6a5f\u8b80\u53d6\u8cc7\u6599\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u5229\u3002<\/li>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u96d6\u7136\u52d5\u614b\u6e38\u6a19\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u8cc7\u6599\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%9c%a8db2%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%e7%9a%84%e6%ad%a5%e9%a9%9f-MCfAqxRwdh\">\u5728DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u4f7f\u7528\u52d5\u614b\u6e38\u6a19\u7684\u6b65\u9a5f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528\u52d5\u614b\u6e38\u6a19\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%ae%9a%e7%be%a9%e6%b8%b8%e6%a8%99-MCfAqxRwdh\">1. \u5b9a\u7fa9\u6e38\u6a19<\/h3>\n<p>\u9996\u5148\uff0c\u9700\u8981\u5728\u5b58\u5132\u904e\u7a0b\u4e2d\u5b9a\u7fa9\u4e00\u500b\u52d5\u614b\u6e38\u6a19\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u5be6\u73fe\uff1a<\/p>\n<pre><code>DECLARE dynamic_cursor CURSOR FOR\nSELECT column1, column2 FROM your_table WHERE condition;<\/code><\/pre>\n<h3 id=\"2-%e6%89%93%e9%96%8b%e6%b8%b8%e6%a8%99-MCfAqxRwdh\">2. \u6253\u958b\u6e38\u6a19<\/h3>\n<p>\u5728\u5b9a\u7fa9\u6e38\u6a19\u5f8c\uff0c\u9700\u8981\u6253\u958b\u5b83\u4ee5\u4fbf\u958b\u59cb\u64cd\u4f5c\uff1a<\/p>\n<pre><code>OPEN dynamic_cursor;<\/code><\/pre>\n<h3 id=\"3-%e8%ae%80%e5%8f%96%e8%b3%87%e6%96%99-MCfAqxRwdh\">3. \u8b80\u53d6\u8cc7\u6599<\/h3>\n<p>\u4f7f\u7528FETCH\u8a9e\u53e5\u4f86\u8b80\u53d6\u6e38\u6a19\u4e2d\u7684\u8cc7\u6599\uff1a<\/p>\n<pre><code>FETCH FROM dynamic_cursor INTO variable1, variable2;<\/code><\/pre>\n<h3 id=\"4-%e8%99%95%e7%90%86%e8%b3%87%e6%96%99-MCfAqxRwdh\">4. \u8655\u7406\u8cc7\u6599<\/h3>\n<p>\u5728\u8b80\u53d6\u8cc7\u6599\u5f8c\uff0c\u53ef\u4ee5\u6839\u64da\u9700\u8981\u9032\u884c\u8655\u7406\uff0c\u4f8b\u5982\u9032\u884c\u8a08\u7b97\u6216\u66f4\u65b0\u5176\u4ed6\u8868\u683c\u3002<\/p>\n<h3 id=\"5-%e9%97%9c%e9%96%89%e6%b8%b8%e6%a8%99-MCfAqxRwdh\">5. \u95dc\u9589\u6e38\u6a19<\/h3>\n<p>\u6700\u5f8c\uff0c\u8a18\u5f97\u95dc\u9589\u6e38\u6a19\u4ee5\u91cb\u653e\u8cc7\u6e90\uff1a<\/p>\n<pre><code>CLOSE dynamic_cursor;<\/code><\/pre>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e5%8b%95%e6%85%8b%e6%b8%b8%e6%a8%99%e7%9a%84%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-MCfAqxRwdh\">\u7bc4\u4f8b\uff1a\u4f7f\u7528\u52d5\u614b\u6e38\u6a19\u7684\u5b58\u5132\u904e\u7a0b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u4f7f\u7528\u52d5\u614b\u6e38\u6a19\uff1a<\/p>\n<pre><code>CREATE PROCEDURE example_procedure()\nBEGIN\n    DECLARE done INT DEFAULT FALSE;\n    DECLARE variable1 INT;\n    DECLARE variable2 VARCHAR(100);\n    DECLARE dynamic_cursor CURSOR FOR\n        SELECT id, name FROM users WHERE status = 'active';\n    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;\n\n    OPEN dynamic_cursor;\n\n    read_loop: LOOP\n        FETCH dynamic_cursor INTO variable1, variable2;\n        IF done THEN\n            LEAVE read_loop;\n        END IF;\n        -- \u5728\u9019\u88e1\u53ef\u4ee5\u5c0d\u8b80\u53d6\u7684\u8cc7\u6599\u9032\u884c\u8655\u7406\n    END LOOP;\n\n    CLOSE dynamic_cursor;\nEND;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-MCfAqxRwdh\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u52d5\u614b\u6e38\u6a19\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u7279\u5225\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u5728\u4f7f\u7528\u6e38\u6a19\u4e4b\u524d\u5df2\u7d93\u6b63\u78ba\u5b9a\u7fa9\u548c\u6253\u958b\u5b83\u3002<\/li>\n<li>\u5728\u8b80\u53d6\u8cc7\u6599\u5f8c\uff0c\u61c9\u8a72\u6aa2\u67e5\u662f\u5426\u5df2\u7d93\u5230\u9054\u7d50\u679c\u96c6\u7684\u672b\u5c3e\u3002<\/li>\n<li>\u5728\u7d50\u675f\u64cd\u4f5c\u5f8c\uff0c\u52d9\u5fc5\u95dc\u9589\u6e38\u6a19\u4ee5\u91cb\u653e\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-MCfAqxRwdh\">\u7e3d\u7d50<\/h2>\n<p>\u52d5\u614b\u6e38\u6a19\u5728DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u8cc7\u6599\u64cd\u4f5c\u65b9\u5f0f\uff0c\u9069\u5408\u9700\u8981\u5373\u6642\u67e5\u8a62\u548c\u96a8\u6a5f\u8a2a\u554f\u7684\u61c9\u7528\u5834\u666f\u3002\u901a\u904e\u6b63\u78ba\u7684\u4f7f\u7528\u65b9\u6848\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u5eab\u4e2d\u7684\u8cc7\u6599\uff0c\u63d0\u9ad8\u61c9\u7528\u7684\u6027\u80fd\u548c\u6548\u7387\u3002\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\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u5b58\u5132\u904e\u7a0b\u4e2d\u52d5\u614b\u6e38\u6a19\u7684\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u8207\u6027\u80fd\uff0c\u78ba\u4fdd\u6b63\u78ba\u4f7f\u7528\u65b9\u6848\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-60463","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60463","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=60463"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60463\/revisions"}],"predecessor-version":[{"id":60464,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60463\/revisions\/60464"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}