{"id":196388,"date":"2024-11-13T23:10:20","date_gmt":"2024-11-13T15:10:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/196388\/"},"modified":"2024-11-13T23:10:22","modified_gmt":"2024-11-13T15:10:22","slug":"%e5%9f%b7%e8%a1%8cdb2%e5%91%bd%e4%bb%a46%e5%a4%a7%e7%a7%98%e7%b1%8d%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/196388\/","title":{"rendered":"\u57f7\u884cDB2\u547d\u4ee46\u5927\u79d8\u7c4d\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<h1 id=\"%e5%9f%b7%e8%a1%8cdb2%e5%91%bd%e4%bb%a46%e5%a4%a7%e7%a7%98%e7%b1%8d%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f-cgQCAEfHYr\">\u57f7\u884cDB2\u547d\u4ee46\u5927\u79d8\u7c4d\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>DB2\u662f\u4e00\u6b3e\u7531IBM\u958b\u767c\u7684\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u4f01\u696d\u7d1a\u61c9\u7528\u4e2d\u3002\u5c0d\u65bcDB2\u7684\u4f7f\u7528\u8005\u4f86\u8aaa\uff0c\u638c\u63e1\u4e00\u4e9b\u57f7\u884cDB2\u547d\u4ee4\u7684\u6280\u5de7\uff0c\u53ef\u4ee5\u5927\u5e45\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u57f7\u884cDB2\u547d\u4ee4\u7684\u516d\u5927\u79d8\u7c4d\uff0c\u5e6b\u52a9\u4f7f\u7528\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-%e7%86%9f%e6%82%89%e5%9f%ba%e6%9c%ac%e5%91%bd%e4%bb%a4-cgQCAEfHYr\">1. \u719f\u6089\u57fa\u672c\u547d\u4ee4<\/h2>\n<p>\u5728\u4f7f\u7528DB2\u4e4b\u524d\uff0c\u9996\u5148\u9700\u8981\u719f\u6089\u4e00\u4e9b\u57fa\u672c\u7684DB2\u547d\u4ee4\u3002\u9019\u4e9b\u547d\u4ee4\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>CONNECT<\/code>\uff1a\u7528\u65bc\u9023\u63a5\u5230\u6578\u64da\u5eab\u3002<\/li>\n<li><code>CREATE TABLE<\/code>\uff1a\u7528\u65bc\u5275\u5efa\u65b0\u8868\u3002<\/li>\n<li><code>INSERT<\/code>\uff1a\u7528\u65bc\u63d2\u5165\u6578\u64da\u3002<\/li>\n<li><code>SELECT<\/code>\uff1a\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><code>UPDATE<\/code>\uff1a\u7528\u65bc\u66f4\u65b0\u6578\u64da\u3002<\/li>\n<li><code>DELETE<\/code>\uff1a\u7528\u65bc\u522a\u9664\u6578\u64da\u3002<\/li>\n<\/ul>\n<p>\u719f\u6089\u9019\u4e9b\u57fa\u672c\u547d\u4ee4\u5f8c\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u66f4\u5feb\u901f\u5730\u9032\u884c\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8sql%e8%85%b3%e6%9c%ac%e8%87%aa%e5%8b%95%e5%8c%96%e6%93%8d%e4%bd%9c-cgQCAEfHYr\">2. \u4f7f\u7528SQL\u8173\u672c\u81ea\u52d5\u5316\u64cd\u4f5c<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8\u6548\u7387\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u5c07\u5e38\u7528\u7684DB2\u547d\u4ee4\u5beb\u5165SQL\u8173\u672c\u4e2d\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u91cd\u8907\u8f38\u5165\u76f8\u540c\u7684\u547d\u4ee4\uff0c\u4e26\u4e14\u80fd\u5920\u6279\u91cf\u57f7\u884c\u591a\u500b\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684SQL\u8173\u672c\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>-- \u5275\u5efa\u4e00\u500b\u65b0\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', 'Manager');\nINSERT INTO employees (id, name, position) VALUES (2, 'Jane Smith', 'Developer');\n<\/code><\/pre>\n<p>\u4f7f\u7528SQL\u8173\u672c\u53ef\u4ee5\u5927\u5e45\u63d0\u9ad8\u6578\u64da\u5eab\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"3-%e5%88%a9%e7%94%a8db2%e7%9a%84%e6%9f%a5%e8%a9%a2%e5%84%aa%e5%8c%96%e5%99%a8-cgQCAEfHYr\">3. \u5229\u7528DB2\u7684\u67e5\u8a62\u512a\u5316\u5668<\/h2>\n<p>DB2\u5167\u5efa\u7684\u67e5\u8a62\u512a\u5316\u5668\u53ef\u4ee5\u5e6b\u52a9\u4f7f\u7528\u8005\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u4f7f\u7528\u8005\u53ef\u4ee5\u901a\u904e\u5206\u6790\u67e5\u8a62\u8a08\u5283\u4f86\u4e86\u89e3DB2\u5982\u4f55\u57f7\u884c\u67e5\u8a62\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u8abf\u6574\u3002\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u53ef\u4ee5\u67e5\u770b\u67e5\u8a62\u8a08\u5283\uff1a<\/p>\n<pre><code>EXPLAIN PLAN FOR\nSELECT * FROM employees WHERE position = 'Developer';\n<\/code><\/pre>\n<p>\u901a\u904e\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u627e\u5230\u6f5b\u5728\u7684\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u9032\u884c\u512a\u5316\u3002<\/p>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95%e6%8f%90%e9%ab%98%e6%9f%a5%e8%a9%a2%e9%80%9f%e5%ba%a6-cgQCAEfHYr\">4. \u4f7f\u7528\u7d22\u5f15\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002\u4f7f\u7528\u8005\u53ef\u4ee5\u6839\u64da\u67e5\u8a62\u7684\u9700\u6c42\u5275\u5efa\u9069\u7576\u7684\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u67e5\u8a62\u7684\u5b57\u6bb5\uff0c\u53ef\u4ee5\u5275\u5efa\u7d22\u5f15\u4f86\u52a0\u901f\u67e5\u8a62\uff1a<\/p>\n<pre><code>CREATE INDEX idx_position ON employees (position);\n<\/code><\/pre>\n<p>\u9019\u6a23\u5728\u67e5\u8a62\u6642\uff0cDB2\u53ef\u4ee5\u66f4\u5feb\u5730\u627e\u5230\u6240\u9700\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"5-%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-cgQCAEfHYr\">5. \u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7dad\u8b77<\/h2>\n<p>\u5b9a\u671f\u7684\u6578\u64da\u5eab\u7dad\u8b77\u662f\u78ba\u4fddDB2\u6027\u80fd\u7684\u95dc\u9375\u3002\u4f7f\u7528\u8005\u61c9\u5b9a\u671f\u57f7\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\u91cd\u7d44\u6578\u64da\u5eab\u4ee5\u63d0\u9ad8\u5b58\u53d6\u6548\u7387\u3002<\/li>\n<li>\u66f4\u65b0\u7d71\u8a08\u4fe1\u606f\u4ee5\u5e6b\u52a9\u67e5\u8a62\u512a\u5316\u5668\u505a\u51fa\u66f4\u597d\u7684\u6c7a\u7b56\u3002<\/li>\n<li>\u6e05\u7406\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u4ee5\u91cb\u653e\u7a7a\u9593\u3002<\/li>\n<\/ul>\n<h2 id=\"6-%e5%88%a9%e7%94%a8db2%e7%9a%84%e5%ae%89%e5%85%a8%e6%80%a7%e5%8a%9f%e8%83%bd-cgQCAEfHYr\">6. \u5229\u7528DB2\u7684\u5b89\u5168\u6027\u529f\u80fd<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u591a\u7a2e\u5b89\u5168\u6027\u529f\u80fd\uff0c\u4f7f\u7528\u8005\u61c9\u5145\u5206\u5229\u7528\u9019\u4e9b\u529f\u80fd\u4f86\u4fdd\u8b77\u6578\u64da\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u7528\u6236\u6b0a\u9650\u4f86\u9650\u5236\u5c0d\u654f\u611f\u6578\u64da\u7684\u8a2a\u554f\uff1a<\/p>\n<pre><code>GRANT SELECT ON employees TO user1;\nREVOKE DELETE ON employees FROM user1;\n<\/code><\/pre>\n<p>\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u53ea\u6709\u6388\u6b0a\u7684\u7528\u6236\u624d\u80fd\u8a2a\u554f\u6216\u4fee\u6539\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-cgQCAEfHYr\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1\u57f7\u884cDB2\u547d\u4ee4\u7684\u516d\u5927\u79d8\u7c4d\uff0c\u53ef\u4ee5\u5e6b\u52a9\u4f7f\u7528\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u63d0\u5347\u5de5\u4f5c\u6548\u7387\u3002\u5f9e\u719f\u6089\u57fa\u672c\u547d\u4ee4\u5230\u5229\u7528\u7d22\u5f15\u548c\u5b89\u5168\u6027\u529f\u80fd\uff0c\u6bcf\u4e00\u500b\u6280\u5de7\u90fd\u80fd\u70ba\u6578\u64da\u5eab\u7684\u904b\u884c\u5e36\u4f86\u7a4d\u6975\u5f71\u97ff\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u57f7\u884cDB2\u547d\u4ee4\u7684\u516d\u5927\u79d8\u7c4d\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\uff0c\u638c\u63e1\u95dc\u9375\u6280\u5de7\uff0c\u8b93\u4f60\u7684DB2\u64cd\u4f5c\u66f4\u5f97\u5fc3\u61c9\u624b\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-196388","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196388","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=196388"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196388\/revisions"}],"predecessor-version":[{"id":196389,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/196388\/revisions\/196389"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=196388"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=196388"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=196388"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}