{"id":94354,"date":"2024-10-19T19:05:28","date_gmt":"2024-10-19T11:05:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94354\/"},"modified":"2024-10-19T19:05:29","modified_gmt":"2024-10-19T11:05:29","slug":"oracle-sql%e8%aa%9e%e6%b3%95%e8%88%87%e6%95%b8%e6%93%9a%e5%b0%8d%e8%b1%a1%e7%9a%84%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94354\/","title":{"rendered":"Oracle SQL\u8a9e\u6cd5\u8207\u6578\u64da\u5c0d\u8c61\u7684\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"oracle-sql%e8%aa%9e%e6%b3%95%e8%88%87%e6%95%b8%e6%93%9a%e5%b0%8d%e8%b1%a1%e7%9a%84%e6%8f%8f%e8%bf%b0-aLTACuMFSL\">Oracle SQL\u8a9e\u6cd5\u8207\u6578\u64da\u5c0d\u8c61\u7684\u63cf\u8ff0<\/h1>\n<p>Oracle SQL\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u7ba1\u7406\u548c\u6578\u64da\u5206\u6790\u3002\u5b83\u4e0d\u50c5\u652f\u6301\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u9084\u80fd\u5920\u8655\u7406\u5404\u7a2e\u6578\u64da\u5c0d\u8c61\uff0c\u5982\u8868\u3001\u8996\u5716\u3001\u7d22\u5f15\u7b49\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle SQL\u7684\u57fa\u672c\u8a9e\u6cd5\u53ca\u5176\u6578\u64da\u5c0d\u8c61\u7684\u7279\u6027\u3002<\/p>\n<h2 id=\"oracle-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-aLTACuMFSL\">Oracle SQL\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>Oracle SQL\u7684\u8a9e\u6cd5\u7d50\u69cb\u76f8\u5c0d\u7c21\u55ae\uff0c\u4e3b\u8981\u7531\u4ee5\u4e0b\u5e7e\u500b\u90e8\u5206\u7d44\u6210\uff1a<\/p>\n<ul>\n<li><strong>SELECT<\/strong>\uff1a\u7528\u65bc\u67e5\u8a62\u6578\u64da\u3002<\/li>\n<li><strong>FROM<\/strong>\uff1a\u6307\u5b9a\u67e5\u8a62\u7684\u6578\u64da\u4f86\u6e90\u3002<\/li>\n<li><strong>WHERE<\/strong>\uff1a\u7528\u65bc\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\u3002<\/li>\n<li><strong>ORDER BY<\/strong>\uff1a\u7528\u65bc\u6392\u5e8f\u67e5\u8a62\u7d50\u679c\u3002<\/li>\n<li><strong>GROUP BY<\/strong>\uff1a\u7528\u65bc\u5206\u7d44\u67e5\u8a62\u7d50\u679c\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT first_name, last_name\nFROM employees\nWHERE department_id = 10\nORDER BY last_name;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5f9e\u201cemployees\u201d\u8868\u4e2d\u9078\u64c7\u6240\u6709\u90e8\u9580ID\u70ba10\u7684\u54e1\u5de5\u7684\u540d\u5b57\uff0c\u4e26\u6309\u59d3\u6c0f\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%b0%8d%e8%b1%a1%e7%9a%84%e9%a1%9e%e5%9e%8b-aLTACuMFSL\">\u6578\u64da\u5c0d\u8c61\u7684\u985e\u578b<\/h2>\n<p>\u5728Oracle SQL\u4e2d\uff0c\u6578\u64da\u5c0d\u8c61\u4e3b\u8981\u5305\u62ec\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<h3 id=\"1-%e8%a1%a8%ef%bc%88table%ef%bc%89-aLTACuMFSL\">1. \u8868\uff08Table\uff09<\/h3>\n<p>\u8868\u662f\u6578\u64da\u5eab\u4e2d\u6700\u57fa\u672c\u7684\u6578\u64da\u5c0d\u8c61\uff0c\u7528\u65bc\u5b58\u5132\u6578\u64da\u3002\u6bcf\u500b\u8868\u7531\u884c\u548c\u5217\u7d44\u6210\uff0c\u884c\u4ee3\u8868\u8a18\u9304\uff0c\u5217\u4ee3\u8868\u5b57\u6bb5\u3002\u5275\u5efa\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE employees (\n    employee_id NUMBER PRIMARY KEY,\n    first_name VARCHAR2(50),\n    last_name VARCHAR2(50),\n    hire_date DATE\n);<\/code><\/pre>\n<h3 id=\"2-%e8%a6%96%e5%9c%96%ef%bc%88view%ef%bc%89-aLTACuMFSL\">2. \u8996\u5716\uff08View\uff09<\/h3>\n<p>\u8996\u5716\u662f\u4e00\u7a2e\u865b\u64ec\u8868\uff0c\u5b83\u662f\u57fa\u65bc\u67e5\u8a62\u7d50\u679c\u7684\u6578\u64da\u5c0d\u8c61\u3002\u8996\u5716\u4e0d\u5b58\u5132\u6578\u64da\uff0c\u800c\u662f\u52d5\u614b\u751f\u6210\u3002\u5275\u5efa\u8996\u5716\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE VIEW employee_view AS\nSELECT first_name, last_name\nFROM employees\nWHERE hire_date &gt; '2020-01-01';<\/code><\/pre>\n<h3 id=\"3-%e7%b4%a2%e5%bc%95%ef%bc%88index%ef%bc%89-aLTACuMFSL\">3. \u7d22\u5f15\uff08Index\uff09<\/h3>\n<p>\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u7528\u65bc\u52a0\u901f\u67e5\u8a62\u64cd\u4f5c\u3002\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u4e5f\u6703\u589e\u52a0\u6578\u64da\u63d2\u5165\u548c\u66f4\u65b0\u7684\u6210\u672c\u3002\u5275\u5efa\u7d22\u5f15\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE INDEX idx_last_name\nON employees (last_name);<\/code><\/pre>\n<h3 id=\"4-%e5%ba%8f%e5%88%97%ef%bc%88sequence%ef%bc%89-aLTACuMFSL\">4. \u5e8f\u5217\uff08Sequence\uff09<\/h3>\n<p>\u5e8f\u5217\u662f\u4e00\u7a2e\u6578\u64da\u5c0d\u8c61\uff0c\u7528\u65bc\u751f\u6210\u552f\u4e00\u7684\u6578\u5b57\uff0c\u901a\u5e38\u7528\u65bc\u4e3b\u9375\u3002\u5275\u5efa\u5e8f\u5217\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE SEQUENCE emp_seq\nSTART WITH 1\nINCREMENT BY 1; <\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e6%93%8d%e4%bd%9c%e8%aa%9e%e8%a8%80%ef%bc%88dml%ef%bc%89-aLTACuMFSL\">\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\uff08DML\uff09<\/h2>\n<p>\u6578\u64da\u64cd\u4f5c\u8a9e\u8a00\u662f\u7528\u65bc\u64cd\u4f5c\u6578\u64da\u7684SQL\u8a9e\u53e5\uff0c\u5305\u62ec\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u9019\u4e9b\u64cd\u4f5c\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<h3 id=\"%e6%8f%92%e5%85%a5%e6%95%b8%e6%93%9a-aLTACuMFSL\">\u63d2\u5165\u6578\u64da<\/h3>\n<pre><code>INSERT INTO employees (employee_id, first_name, last_name, hire_date)\nVALUES (emp_seq.NEXTVAL, 'John', 'Doe', SYSDATE);<\/code><\/pre>\n<h3 id=\"%e6%9b%b4%e6%96%b0%e6%95%b8%e6%93%9a-aLTACuMFSL\">\u66f4\u65b0\u6578\u64da<\/h3>\n<pre><code>UPDATE employees\nSET last_name = 'Smith'\nWHERE employee_id = 1;<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e6%95%b8%e6%93%9a-aLTACuMFSL\">\u522a\u9664\u6578\u64da<\/h3>\n<pre><code>DELETE FROM employees\nWHERE employee_id = 1;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-aLTACuMFSL\">\u7e3d\u7d50<\/h2>\n<p>Oracle SQL\u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\uff0c\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u5404\u7a2e\u6578\u64da\u5c0d\u8c61\u3002\u901a\u904e\u638c\u63e1\u5176\u57fa\u672c\u8a9e\u6cd5\u548c\u6578\u64da\u5c0d\u8c61\u7684\u7279\u6027\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u66f4\u9ad8\u6548\u5730\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u7ba1\u7406\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a>\uff0c\u90fd\u80fd\u70ba\u6578\u64da\u7ba1\u7406\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle SQL\u8a9e\u6cd5\u53ca\u6578\u64da\u5c0d\u8c61\u7684\u8a73\u7d30\u63cf\u8ff0\uff0c\u5e6b\u52a9\u60a8\u9ad8\u6548\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u5eab\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-94354","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94354","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=94354"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94354\/revisions"}],"predecessor-version":[{"id":94355,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94354\/revisions\/94355"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}