{"id":60389,"date":"2024-10-13T02:27:16","date_gmt":"2024-10-12T18:27:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60389\/"},"modified":"2024-10-13T02:27:16","modified_gmt":"2024-10-12T18:27:16","slug":"db2%e7%b7%a8%e7%a8%8b%e5%ba%8f%e7%9a%84%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60389\/","title":{"rendered":"DB2\u7de8\u7a0b\u5e8f\u7684\u64cd\u4f5c\u6280\u5de7\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<h1 id=\"db2%e7%b7%a8%e7%a8%8b%e5%ba%8f%e7%9a%84%e6%93%8d%e4%bd%9c%e6%8a%80%e5%b7%a7%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f-uUTOIueErP\">DB2\u7de8\u7a0b\u5e8f\u7684\u64cd\u4f5c\u6280\u5de7\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>DB2\u662f\u4e00\u6b3e\u7531IBM\u958b\u767c\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u4f01\u696d\u7d1a\u61c9\u7528\u7a0b\u5f0f\u4e2d\u3002\u7121\u8ad6\u662f\u8cc7\u6599\u7684\u5b58\u53d6\u3001\u7ba1\u7406\u9084\u662f\u5206\u6790\uff0cDB2\u90fd\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e00\u4e9bDB2\u7de8\u7a0b\u5e8f\u7684\u64cd\u4f5c\u6280\u5de7\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u4f7f\u7528\u9019\u500b\u8cc7\u6599\u5eab\u7cfb\u7d71\u3002<\/p>\n<h2 id=\"1-%e7%86%9f%e6%82%89db2%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-uUTOIueErP\">1. \u719f\u6089DB2\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728\u958b\u59cb\u7de8\u5bebDB2\u7a0b\u5e8f\u4e4b\u524d\uff0c\u958b\u767c\u8005\u61c9\u8a72\u719f\u6089DB2\u7684\u57fa\u672cSQL\u8a9e\u6cd5\u3002DB2\u652f\u6301\u6a19\u6e96SQL\u8a9e\u6cd5\uff0c\u4e26\u4e14\u9084\u63d0\u4f9b\u4e86\u4e00\u4e9b\u64f4\u5c55\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u57fa\u672c\u7684SQL\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<pre><code>-- \u5275\u5efa\u4e00\u500b\u8868\nCREATE TABLE Employees (\n    ID INT PRIMARY KEY,\n    Name VARCHAR(100),\n    Position VARCHAR(100)\n);\n\n-- \u63d2\u5165\u6578\u64da\nINSERT INTO Employees (ID, Name, Position) VALUES (1, 'John Doe', 'Developer');\n\n-- \u67e5\u8a62\u6578\u64da\nSELECT * FROM Employees;\n<\/code><\/pre>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8db2%e7%9a%84%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b-uUTOIueErP\">2. \u4f7f\u7528DB2\u7684\u5b58\u5132\u904e\u7a0b<\/h2>\n<p>\u5b58\u5132\u904e\u7a0b\u662f\u4e00\u7a2e\u5728\u8cc7\u6599\u5eab\u4e2d\u57f7\u884c\u7684\u9810\u7de8\u8b6fSQL\u8a9e\u53e5\u96c6\u5408\u3002\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u56e0\u70ba\u5b83\u5011\u5728\u8cc7\u6599\u5eab\u4e2d\u57f7\u884c\uff0c\u6e1b\u5c11\u4e86\u7db2\u7d61\u50b3\u8f38\u7684\u958b\u92b7\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5b58\u5132\u904e\u7a0b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE PROCEDURE GetEmployeeByID (IN empID INT)\nBEGIN\n    SELECT * FROM Employees WHERE ID = empID;\nEND;\n<\/code><\/pre>\n<p>\u8abf\u7528\u5b58\u5132\u904e\u7a0b\u7684\u65b9\u5f0f\u5982\u4e0b\uff1a<\/p>\n<pre><code>CALL GetEmployeeByID(1);\n<\/code><\/pre>\n<h2 id=\"3-%e5%88%a9%e7%94%a8db2%e7%9a%84%e7%b4%a2%e5%bc%95%e5%8a%9f%e8%83%bd-uUTOIueErP\">3. \u5229\u7528DB2\u7684\u7d22\u5f15\u529f\u80fd<\/h2>\n<p>\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002DB2\u652f\u6301\u591a\u7a2e\u7d22\u5f15\u985e\u578b\uff0c\u5305\u62ec\u552f\u4e00\u7d22\u5f15\u548c\u8907\u5408\u7d22\u5f15\u3002\u5275\u5efa\u7d22\u5f15\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_position ON Employees (Position);\n<\/code><\/pre>\n<p>\u4f7f\u7528\u7d22\u5f15\u5f8c\uff0c\u67e5\u8a62\u6027\u80fd\u6703\u6709\u660e\u986f\u63d0\u5347\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"4-%e4%ba%86%e8%a7%a3db2%e7%9a%84%e4%ba%8b%e5%8b%99%e7%ae%a1%e7%90%86-uUTOIueErP\">4. \u4e86\u89e3DB2\u7684\u4e8b\u52d9\u7ba1\u7406<\/h2>\n<p>DB2\u652f\u6301ACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u3001\u6301\u4e45\u6027\uff09\u4e8b\u52d9\u7279\u6027\u3002\u958b\u767c\u8005\u61c9\u8a72\u4e86\u89e3\u5982\u4f55\u4f7f\u7528\u4e8b\u52d9\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002\u4ee5\u4e0b\u662f\u4e8b\u52d9\u7684\u57fa\u672c\u64cd\u4f5c\uff1a<\/p>\n<pre><code>BEGIN;\n    INSERT INTO Employees (ID, Name, Position) VALUES (2, 'Jane Smith', 'Manager');\nCOMMIT;\n<\/code><\/pre>\n<p>\u5982\u679c\u5728\u4e8b\u52d9\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528ROLLBACK\u4f86\u64a4\u92b7\u64cd\u4f5c\uff1a<\/p>\n<pre><code>ROLLBACK;\n<\/code><\/pre>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8db2%e7%9a%84%e6%80%a7%e8%83%bd%e7%9b%a3%e6%8e%a7%e5%b7%a5%e5%85%b7-uUTOIueErP\">5. \u4f7f\u7528DB2\u7684\u6027\u80fd\u76e3\u63a7\u5de5\u5177<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u5206\u6790\u548c\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002\u4f7f\u7528DB2\u7684\u57f7\u884c\u8a08\u5283\u529f\u80fd\uff0c\u53ef\u4ee5\u67e5\u770b\u67e5\u8a62\u7684\u57f7\u884c\u8def\u5f91\uff0c\u5f9e\u800c\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002\u4ee5\u4e0b\u662f\u67e5\u770b\u57f7\u884c\u8a08\u5283\u7684\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM Employees WHERE Position = 'Developer';\n<\/code><\/pre>\n<h2 id=\"6-%e5%ae%9a%e6%9c%9f%e9%80%b2%e8%a1%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b6%ad%e8%ad%b7-uUTOIueErP\">6. \u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7dad\u8b77<\/h2>\n<p>\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u53ef\u4ee5\u78ba\u4fddDB2\u7684\u9ad8\u6548\u904b\u884c\u3002\u9019\u5305\u62ec\u91cd\u7d44\u7d22\u5f15\u3001\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\u548c\u6e05\u7406\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\uff1a<\/p>\n<pre><code>RUNSTATS ON TABLE Employees;\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uUTOIueErP\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1DB2\u7684\u64cd\u4f5c\u6280\u5de7\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u5f9e\u57fa\u672c\u8a9e\u6cd5\u5230\u5b58\u5132\u904e\u7a0b\u3001\u7d22\u5f15\u3001\u4e8b\u52d9\u7ba1\u7406\u3001\u6027\u80fd\u76e3\u63a7\u53ca\u6578\u64da\u5eab\u7dad\u8b77\uff0c\u9019\u4e9b\u6280\u5de7\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u4f7f\u7528DB2\u3002\u82e5\u60a8\u9700\u8981\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728\u96f2\u7aef\u74b0\u5883\u4e2d\u904b\u884cDB2\uff0c\u6216\u5c0b\u627e\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u7de8\u7a0b\u7684\u64cd\u4f5c\u6280\u5de7\uff0c\u5305\u62ec\u6700\u4f73\u5be6\u8e10\u3001\u6027\u80fd\u512a\u5316\u548c\u5e38\u898b\u554f\u984c\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u60a8\u7684\u6578\u64da\u5eab\u7ba1\u7406\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-60389","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60389","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=60389"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60389\/revisions"}],"predecessor-version":[{"id":60390,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60389\/revisions\/60390"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}