{"id":180718,"date":"2024-11-09T12:36:16","date_gmt":"2024-11-09T04:36:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/180718\/"},"modified":"2024-11-09T12:36:17","modified_gmt":"2024-11-09T04:36:17","slug":"%e6%b7%b1%e5%85%a5%e4%ba%86%e8%a7%a3oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%846%e7%a8%ae%e7%b4%84%e6%9d%9f-oracle%e6%95%b8%e6%93%9a%e5%ba%ab6%e7%a8%ae%e7%b4%84%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/180718\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3Oracle\u6578\u64da\u5eab\u76846\u7a2e\u7d04\u675f (oracle\u6578\u64da\u5eab6\u7a2e\u7d04\u675f)"},"content":{"rendered":"

\u6df1\u5165\u4e86\u89e3Oracle\u6578\u64da\u5eab\u76846\u7a2e\u7d04\u675f<\/h1>\n

\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u7d04\u675f\u662f\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u91cd\u8981\u5de5\u5177\u3002Oracle\u6578\u64da\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d04\u675f\u985e\u578b\uff0c\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u7dad\u8b77\u6578\u64da\u7684\u8cea\u91cf\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eOracle\u6578\u64da\u5eab\u4e2d\u7684\u516d\u7a2e\u4e3b\u8981\u7d04\u675f\u985e\u578b\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

1. \u4e3b\u9375\u7d04\u675f (PRIMARY KEY)<\/h2>\n

\u4e3b\u9375\u7d04\u675f\u7528\u65bc\u552f\u4e00\u6a19\u8b58\u6578\u64da\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\uff0c\u4e26\u4e14\u4e3b\u9375\u7684\u503c\u4e0d\u80fd\u70ba\u7a7a\u3002\u4e3b\u9375\u7d04\u675f\u901a\u5e38\u7531\u4e00\u500b\u6216\u591a\u500b\u5217\u7d44\u6210\uff0c\u9019\u4e9b\u5217\u7684\u7d44\u5408\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n

CREATE TABLE employees (\n    employee_id NUMBER PRIMARY KEY,\n    first_name VARCHAR2(50),\n    last_name VARCHAR2(50)\n);<\/code><\/pre>\n
2. \u5916\u9375\u7d04\u675f (FOREIGN KEY)<\/h2>\n
\u5916\u9375\u7d04\u675f\u7528\u65bc\u5efa\u7acb\u5169\u500b\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002\u5b83\u78ba\u4fdd\u4e00\u500b\u8868\u4e2d\u7684\u67d0\u5217\uff08\u6216\u591a\u5217\uff09\u503c\u5fc5\u9808\u5728\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\u4e2d\u5b58\u5728\u3002\u9019\u6709\u52a9\u65bc\u7dad\u8b77\u6578\u64da\u7684\u53c3\u7167\u5b8c\u6574\u6027\u3002<\/p>\n
CREATE TABLE departments (\n    department_id NUMBER PRIMARY KEY,\n    department_name VARCHAR2(50)\n);\n\nCREATE TABLE employees (\n    employee_id NUMBER PRIMARY KEY,\n    department_id NUMBER,\n    FOREIGN KEY (department_id) REFERENCES departments(department_id)\n);<\/code><\/pre>\n
3. \u552f\u4e00\u7d04\u675f (UNIQUE)<\/h2>\n
\u552f\u4e00\u7d04\u675f\u78ba\u4fdd\u67d0\u5217\u4e2d\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\uff0c\u9019\u610f\u5473\u8457\u4e0d\u5141\u8a31\u91cd\u8907\u7684\u503c\u3002\u8207\u4e3b\u9375\u7d04\u675f\u4e0d\u540c\u7684\u662f\uff0c\u552f\u4e00\u7d04\u675f\u5141\u8a31\u5217\u4e2d\u6709\u7a7a\u503c\u3002<\/p>\n
CREATE TABLE users (\n    user_id NUMBER PRIMARY KEY,\n    email VARCHAR2(100) UNIQUE\n);<\/code><\/pre>\n
4. \u6aa2\u67e5\u7d04\u675f (CHECK)<\/h2>\n
\u6aa2\u67e5\u7d04\u675f\u7528\u65bc\u9650\u5236\u5217\u4e2d\u7684\u503c\uff0c\u78ba\u4fdd\u5b83\u5011\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002\u9019\u53ef\u4ee5\u7528\u4f86\u5f37\u5236\u57f7\u884c\u696d\u52d9\u898f\u5247\u3002<\/p>\n
CREATE TABLE products (\n    product_id NUMBER PRIMARY KEY,\n    price NUMBER CHECK (price > 0)\n);<\/code><\/pre>\n
5. \u975e\u7a7a\u7d04\u675f (NOT NULL)<\/h2>\n
\u975e\u7a7a\u7d04\u675f\u78ba\u4fdd\u67d0\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002\u9019\u5c0d\u65bc\u90a3\u4e9b\u5fc5\u9808\u6709\u503c\u7684\u5217\u975e\u5e38\u91cd\u8981\uff0c\u4f8b\u5982\u7528\u6236\u540d\u6216\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n
CREATE TABLE customers (\n    customer_id NUMBER PRIMARY KEY,\n    customer_name VARCHAR2(100) NOT NULL\n);<\/code><\/pre>\n
6. \u9ed8\u8a8d\u7d04\u675f (DEFAULT)<\/h2>\n
\u9ed8\u8a8d\u7d04\u675f\u7528\u65bc\u70ba\u5217\u6307\u5b9a\u4e00\u500b\u9ed8\u8a8d\u503c\uff0c\u7576\u63d2\u5165\u6578\u64da\u6642\u5982\u679c\u672a\u63d0\u4f9b\u8a72\u5217\u7684\u503c\uff0c\u5247\u4f7f\u7528\u6b64\u9ed8\u8a8d\u503c\u3002<\/p>\n
CREATE TABLE orders (\n    order_id NUMBER PRIMARY KEY,\n    order_date DATE DEFAULT SYSDATE\n);<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u4e86\u89e3Oracle\u6578\u64da\u5eab\u4e2d\u7684\u7d04\u675f\u985e\u578b\u5c0d\u65bc\u8a2d\u8a08\u9ad8\u6548\u4e14\u53ef\u9760\u7684\u6578\u64da\u5eab\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u4e3b\u9375\u3001\u5916\u9375\u3001\u552f\u4e00\u3001\u6aa2\u67e5\u3001\u975e\u7a7a\u548c\u9ed8\u8a8d\u7d04\u675f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u9019\u4e9b\u7d04\u675f\u4e0d\u50c5\u6709\u52a9\u65bc\u7dad\u8b77\u6578\u64da\u8cea\u91cf\uff0c\u9084\u80fd\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u90e8\u7f72\uff0c\u6211\u5011\u7684 \u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22Oracle\u6578\u64da\u5eab\u4e2d\u7684\u516d\u7a2e\u7d04\u675f\uff0c\u4e86\u89e3\u5982\u4f55\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-180718","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180718","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=180718"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180718\/revisions"}],"predecessor-version":[{"id":180719,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/180718\/revisions\/180719"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=180718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=180718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=180718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}