{"id":188268,"date":"2024-11-11T21:14:21","date_gmt":"2024-11-11T13:14:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/188268\/"},"modified":"2024-11-11T21:14:22","modified_gmt":"2024-11-11T13:14:22","slug":"%e8%ab%87%e4%b8%80%e8%ab%87%e5%85%bc%e5%ae%b9oracle%e5%92%8cdb2%e9%96%8b%e7%99%bc%e6%99%82%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/188268\/","title":{"rendered":"\u8ac7\u4e00\u8ac7\u517c\u5bb9Oracle\u548cDB2\u958b\u767c\u6642\u7684\u6ce8\u610f\u4e8b\u9805"},"content":{"rendered":"

\u8ac7\u4e00\u8ac7\u517c\u5bb9Oracle\u548cDB2\u958b\u767c\u6642\u7684\u6ce8\u610f\u4e8b\u9805<\/h1>\n

\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u9078\u64c7\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u548c\u53ef\u64f4\u5c55\u6027\u81f3\u95dc\u91cd\u8981\u3002Oracle\u548cDB2\u662f\u5169\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08RDBMS\uff09\uff0c\u5b83\u5011\u5404\u81ea\u64c1\u6709\u7368\u7279\u7684\u7279\u6027\u548c\u512a\u52e2\u3002\u5728\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u517c\u5bb9\u9019\u5169\u7a2e\u6578\u64da\u5eab\u7684\u61c9\u7528\u7a0b\u5e8f\u9700\u8981\u8003\u616e\u591a\u500b\u65b9\u9762\uff0c\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u6027\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728\u517c\u5bb9Oracle\u548cDB2\u958b\u767c\u6642\u9700\u8981\u6ce8\u610f\u7684\u5e7e\u500b\u95dc\u9375\u4e8b\u9805\u3002<\/p>\n

1. SQL\u8a9e\u6cd5\u7684\u5dee\u7570<\/h2>\n

Oracle\u548cDB2\u5728SQL\u8a9e\u6cd5\u4e0a\u5b58\u5728\u4e00\u4e9b\u5dee\u7570\uff0c\u9019\u53ef\u80fd\u6703\u5f71\u97ff\u5230\u67e5\u8a62\u7684\u57f7\u884c\u548c\u7d50\u679c\u7684\u8fd4\u56de\u3002\u4f8b\u5982\uff0cOracle\u4f7f\u7528\u7684\u5b57\u7b26\u4e32\u9023\u63a5\u904b\u7b97\u7b26\u662f\u300c||\u300d\uff0c\u800cDB2\u5247\u4f7f\u7528\u300c+\u300d\u3002\u4ee5\u4e0b\u662f\u5169\u8005\u7684\u793a\u4f8b\uff1a<\/p>\n

-- Oracle\nSELECT first_name || ' ' || last_name AS full_name FROM employees;\n\n-- DB2\nSELECT first_name + ' ' + last_name AS full_name FROM employees;\n<\/code><\/pre>\n
\u56e0\u6b64\uff0c\u5728\u64b0\u5bebSQL\u67e5\u8a62\u6642\uff0c\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u8abf\u6574\u8a9e\u6cd5\uff0c\u9019\u53ef\u80fd\u6703\u589e\u52a0\u958b\u767c\u7684\u8907\u96dc\u6027\u3002<\/p>\n
2. \u6578\u64da\u985e\u578b\u7684\u517c\u5bb9\u6027<\/h2>\n
\u4e0d\u540c\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u652f\u6301\u4e0d\u540c\u7684\u6578\u64da\u985e\u578b\u3002\u5728Oracle\u4e2d\uff0c\u5e38\u7528\u7684\u6578\u64da\u985e\u578b\u5305\u62ecVARCHAR2\u3001NUMBER\u548cDATE\uff0c\u800c\u5728DB2\u4e2d\uff0c\u5247\u4f7f\u7528VARCHAR\u3001DECIMAL\u548cTIMESTAMP\u7b49\u3002\u958b\u767c\u8005\u9700\u8981\u78ba\u4fdd\u5728\u6578\u64da\u5eab\u4e4b\u9593\u8f49\u63db\u6578\u64da\u6642\uff0c\u6578\u64da\u985e\u578b\u7684\u517c\u5bb9\u6027\u3002\u4f8b\u5982\uff1a<\/p>\n
-- Oracle\nCREATE TABLE employees (\n    id NUMBER,\n    name VARCHAR2(100),\n    hire_date DATE\n);\n\n-- DB2\nCREATE TABLE employees (\n    id DECIMAL(10, 0),\n    name VARCHAR(100),\n    hire_date TIMESTAMP\n);\n<\/code><\/pre>\n
\u5728\u8a2d\u8a08\u6578\u64da\u6a21\u578b\u6642\uff0c\u958b\u767c\u8005\u61c9\u8a72\u4ed4\u7d30\u8003\u616e\u6578\u64da\u985e\u578b\u7684\u9078\u64c7\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e1f\u5931\u6216\u8f49\u63db\u932f\u8aa4\u3002<\/p>\n
3. \u4e8b\u52d9\u8655\u7406\u7684\u5dee\u7570<\/h2>\n
Oracle\u548cDB2\u5728\u4e8b\u52d9\u8655\u7406\u65b9\u9762\u4e5f\u5b58\u5728\u5dee\u7570\u3002Oracle\u4f7f\u7528\u7684\u662f\u591a\u7248\u672c\u4e26\u767c\u63a7\u5236\uff08MVCC\uff09\uff0c\u800cDB2\u5247\u652f\u6301\u884c\u7d1a\u9396\u548c\u8868\u7d1a\u9396\u3002\u9019\u610f\u5473\u8457\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e0b\uff0c\u5169\u8005\u7684\u6027\u80fd\u8868\u73fe\u53ef\u80fd\u6703\u6709\u6240\u4e0d\u540c\u3002\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u4e8b\u52d9\u8655\u7406\u65b9\u5f0f\uff0c\u4e26\u9032\u884c\u6027\u80fd\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n
4. \u932f\u8aa4\u8655\u7406\u6a5f\u5236<\/h2>\n
\u5728Oracle\u4e2d\uff0c\u932f\u8aa4\u8655\u7406\u901a\u5e38\u4f7f\u7528PL\/SQL\u7684\u7570\u5e38\u8655\u7406\u6a5f\u5236\uff0c\u800c\u5728DB2\u4e2d\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528SQLSTATE\u548cSQLCODE\u4f86\u6355\u7372\u932f\u8aa4\u3002\u958b\u767c\u8005\u9700\u8981\u6839\u64da\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u5be6\u73fe\u76f8\u61c9\u7684\u932f\u8aa4\u8655\u7406\u908f\u8f2f\uff0c\u4ee5\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u5065\u58ef\u6027\u3002<\/p>\n
-- Oracle\nBEGIN\n    -- \u53ef\u80fd\u6703\u5f15\u767c\u932f\u8aa4\u7684\u64cd\u4f5c\nEXCEPTION\n    WHEN OTHERS THEN\n        -- \u932f\u8aa4\u8655\u7406\u908f\u8f2f\nEND;\n\n-- DB2\nDECLARE CONTINUE HANDLER FOR SQLEXCEPTION\nBEGIN\n    -- \u932f\u8aa4\u8655\u7406\u908f\u8f2f\nEND;\n<\/code><\/pre>\n
5. \u6027\u80fd\u512a\u5316<\/h2>\n
\u5728\u517c\u5bb9Oracle\u548cDB2\u7684\u958b\u767c\u4e2d\uff0c\u6027\u80fd\u512a\u5316\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002\u958b\u767c\u8005\u61c9\u8a72\u6839\u64da\u4e0d\u540c\u6578\u64da\u5eab\u7684\u7279\u6027\uff0c\u9078\u64c7\u5408\u9069\u7684\u7d22\u5f15\u7b56\u7565\u3001\u67e5\u8a62\u512a\u5316\u548c\u7de9\u5b58\u6a5f\u5236\u3002\u4f8b\u5982\uff0cOracle\u7684\u67e5\u8a62\u512a\u5316\u5668\u548cDB2\u7684\u67e5\u8a62\u512a\u5316\u5668\u5728\u8655\u7406\u67e5\u8a62\u6642\u7684\u7b56\u7565\u53ef\u80fd\u6709\u6240\u4e0d\u540c\uff0c\u56e0\u6b64\u9700\u8981\u91dd\u5c0d\u6bcf\u500b\u6578\u64da\u5eab\u9032\u884c\u6027\u80fd\u8abf\u6574\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728\u517c\u5bb9Oracle\u548cDB2\u7684\u958b\u767c\u904e\u7a0b\u4e2d\uff0c\u958b\u767c\u8005\u9700\u8981\u6ce8\u610fSQL\u8a9e\u6cd5\u3001\u6578\u64da\u985e\u578b\u3001\u4e8b\u52d9\u8655\u7406\u3001\u932f\u8aa4\u8655\u7406\u548c\u6027\u80fd\u512a\u5316\u7b49\u591a\u500b\u65b9\u9762\u3002\u9019\u4e9b\u8003\u91cf\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u78ba\u4fdd\u5176\u5728\u4e0d\u540c\u6578\u64da\u5eab\u74b0\u5883\u4e2d\u7684\u826f\u597d\u8868\u73fe\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u70ba\u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u7684\u904b\u884c\u74b0\u5883\uff0c\u9032\u4e00\u6b65\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u8a0e\u5728\u517c\u5bb9Oracle\u548cDB2\u958b\u767c\u6642\u9700\u6ce8\u610f\u7684\u95dc\u9375\u4e8b\u9805\uff0c\u5305\u62ec\u8a9e\u6cd5\u5dee\u7570\u3001\u6027\u80fd\u512a\u5316\u53ca\u6578\u64da\u985e\u578b\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-188268","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188268","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=188268"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188268\/revisions"}],"predecessor-version":[{"id":188269,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/188268\/revisions\/188269"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=188268"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=188268"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=188268"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}