{"id":94360,"date":"2024-10-19T19:08:17","date_gmt":"2024-10-19T11:08:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94360\/"},"modified":"2024-10-19T19:08:17","modified_gmt":"2024-10-19T11:08:17","slug":"oracle-sql%e5%9f%b7%e8%a1%8c%e7%b7%a9%e6%85%a2%e7%9a%84%e5%8e%9f%e5%9b%a0%e4%bb%a5%e5%8f%8a%e8%a7%a3%e6%b1%ba%e6%96%b9%e6%a1%88","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94360\/","title":{"rendered":"Oracle SQL\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0\u4ee5\u53ca\u89e3\u6c7a\u65b9\u6848"},"content":{"rendered":"

Oracle SQL\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0\u4ee5\u53ca\u89e3\u6c7a\u65b9\u6848<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u4f01\u696d\u7684\u904b\u71df\u81f3\u95dc\u91cd\u8981\u3002Oracle SQL\u4f5c\u70ba\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u7d93\u5e38\u9762\u81e8\u57f7\u884c\u7de9\u6162\u7684\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0eOracle SQL\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0\u4ee5\u53ca\u76f8\u61c9\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0<\/h2>\n

1. \u4e0d\u826f\u7684\u67e5\u8a62\u8a2d\u8a08<\/h3>\n

\u67e5\u8a62\u7684\u8a2d\u8a08\u5c0d\u65bc\u6027\u80fd\u6709\u8457\u76f4\u63a5\u7684\u5f71\u97ff\u3002\u8907\u96dc\u7684\u67e5\u8a62\u3001\u904e\u591a\u7684\u806f\u63a5\u6216\u4e0d\u5fc5\u8981\u7684\u5b50\u67e5\u8a62\u90fd\u53ef\u80fd\u5c0e\u81f4\u57f7\u884c\u901f\u5ea6\u8b8a\u6162\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u67e5\u8a62\u53ef\u80fd\u6703\u56e0\u70ba\u4e0d\u5fc5\u8981\u7684\u806f\u63a5\u800c\u8b8a\u5f97\u7de9\u6162\uff1a<\/p>\n

SELECT a.*, b.*\nFROM table_a a\nJOIN table_b b ON a.id = b.a_id\nWHERE a.status = 'active';\n<\/code><\/pre>\n
2. \u7f3a\u4e4f\u7d22\u5f15<\/h3>\n
\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u5982\u679c\u8868\u4e2d\u7f3a\u4e4f\u9069\u7576\u7684\u7d22\u5f15\uff0c\u67e5\u8a62\u5c07\u9700\u8981\u6383\u63cf\u6574\u500b\u8868\uff0c\u9019\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u6aa2\u67e5\u7d22\u5f15\uff1a<\/p>\n
SELECT * FROM user_indexes WHERE table_name = 'TABLE_A';\n<\/code><\/pre>\n
3. \u8cc7\u6e90\u74f6\u9838<\/h3>\n
\u4f3a\u670d\u5668\u7684\u786c\u9ad4\u8cc7\u6e90\uff08\u5982CPU\u3001\u5167\u5b58\u548c\u78c1\u789fI\/O\uff09\u4e0d\u8db3\u4e5f\u6703\u5c0e\u81f4SQL\u57f7\u884c\u7de9\u6162\u3002\u7576\u591a\u500b\u67e5\u8a62\u540c\u6642\u57f7\u884c\u6642\uff0c\u8cc7\u6e90\u7684\u7af6\u722d\u6703\u9032\u4e00\u6b65\u52a0\u5287\u9019\u4e00\u554f\u984c\u3002<\/p>\n
4. \u4e0d\u7576\u7684\u914d\u7f6e<\/h3>\n
Oracle\u6578\u64da\u5eab\u7684\u914d\u7f6e\u5c0d\u6027\u80fd\u6709\u8457\u91cd\u8981\u5f71\u97ff\u3002\u4e0d\u7576\u7684\u53c3\u6578\u8a2d\u7f6e\uff08\u5982SGA\u548cPGA\u7684\u5927\u5c0f\uff09\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u7576\u524d\u7684\u914d\u7f6e\uff1a<\/p>\n
SHOW PARAMETER sga;\nSHOW PARAMETER pga;\n<\/code><\/pre>\n
\u89e3\u6c7a\u65b9\u6848<\/h2>\n
1. \u512a\u5316\u67e5\u8a62<\/h3>\n
\u5c0d\u65bc\u4e0d\u826f\u7684\u67e5\u8a62\u8a2d\u8a08\uff0c\u61c9\u8a72\u9032\u884c\u512a\u5316\u3002\u53ef\u4ee5\u4f7f\u7528EXPLAIN PLAN\u4f86\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002\u4f8b\u5982\uff1a<\/p>\n
EXPLAIN PLAN FOR\nSELECT a.*, b.*\nFROM table_a a\nJOIN table_b b ON a.id = b.a_id\nWHERE a.status = 'active';\n<\/code><\/pre>\n
2. \u6dfb\u52a0\u7d22\u5f15<\/h3>\n
\u6839\u64da\u67e5\u8a62\u7684\u9700\u6c42\uff0c\u9069\u7576\u5730\u6dfb\u52a0\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u5c0d\u65bc\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\uff0c\u61c9\u8003\u616e\u5275\u5efa\u7d22\u5f15\u3002\u4f8b\u5982\uff1a<\/p>\n
CREATE INDEX idx_status ON table_a(status);\n<\/code><\/pre>\n
3. \u5347\u7d1a\u786c\u9ad4\u8cc7\u6e90<\/h3>\n
\u5982\u679c\u4f3a\u670d\u5668\u7684\u8cc7\u6e90\u4e0d\u8db3\uff0c\u8003\u616e\u5347\u7d1a\u786c\u9ad4\u6216\u4f7f\u7528\u66f4\u9ad8\u6548\u7684\u8cc7\u6e90\u914d\u7f6e\u3002\u9019\u53ef\u4ee5\u901a\u904e\u589e\u52a0CPU\u6838\u5fc3\u6578\u3001\u64f4\u5c55\u5167\u5b58\u6216\u4f7f\u7528\u66f4\u5feb\u7684\u78c1\u789f\u4f86\u5be6\u73fe\u3002<\/p>\n
4. \u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e<\/h3>\n
\u6839\u64da\u5be6\u969b\u9700\u6c42\u8abf\u6574Oracle\u6578\u64da\u5eab\u7684\u914d\u7f6e\u53c3\u6578\uff0c\u4ee5\u78ba\u4fdd\u8cc7\u6e90\u7684\u6700\u4f73\u5229\u7528\u3002\u53ef\u4ee5\u53c3\u8003Oracle\u5b98\u65b9\u6587\u6a94\u4f86\u7372\u53d6\u6700\u4f73\u5be6\u8e10\u5efa\u8b70\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
Oracle SQL\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0\u591a\u7a2e\u591a\u6a23\uff0c\u5305\u62ec\u4e0d\u826f\u7684\u67e5\u8a62\u8a2d\u8a08\u3001\u7f3a\u4e4f\u7d22\u5f15\u3001\u8cc7\u6e90\u74f6\u9838\u548c\u4e0d\u7576\u7684\u914d\u7f6e\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\u3001\u6dfb\u52a0\u7d22\u5f15\u3001\u5347\u7d1a\u786c\u9ad4\u8cc7\u6e90\u548c\u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684VPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u5e0c\u671b\u672c\u6587\u80fd\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u548c\u89e3\u6c7aOracle SQL\u57f7\u884c\u7de9\u6162\u7684\u554f\u984c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22Oracle SQL\u57f7\u884c\u7de9\u6162\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u5be6\u73fe\u66f4\u5feb\u7684\u6578\u64da\u8655\u7406\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-94360","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94360","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=94360"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94360\/revisions"}],"predecessor-version":[{"id":94361,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94360\/revisions\/94361"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}