{"id":195991,"date":"2024-11-13T19:37:18","date_gmt":"2024-11-13T11:37:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/195991\/"},"modified":"2024-11-13T19:37:19","modified_gmt":"2024-11-13T11:37:19","slug":"%e6%91%98%e8%a6%81oracle-check%e7%b4%84%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/195991\/","title":{"rendered":"\u6458\u8981Oracle Check\u7d04\u675f"},"content":{"rendered":"<h1 id=\"%e6%91%98%e8%a6%81oracle-check%e7%b4%84%e6%9d%9f-njnDySiWpP\">\u6458\u8981Oracle Check\u7d04\u675f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d04\u675f\uff08Constraint\uff09\u662f\u7528\u4f86\u9650\u5236\u8cc7\u6599\u8868\u4e2d\u8cc7\u6599\u7684\u6709\u6548\u6027\u548c\u5b8c\u6574\u6027\u7684\u4e00\u7a2e\u898f\u5247\u3002Oracle\u8cc7\u6599\u5eab\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d04\u675f\u985e\u578b\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662fCheck\u7d04\u675f\u3002Check\u7d04\u675f\u5141\u8a31\u7528\u6236\u5b9a\u7fa9\u4e00\u500b\u689d\u4ef6\uff0c\u53ea\u6709\u7576\u8cc7\u6599\u6eff\u8db3\u8a72\u689d\u4ef6\u6642\uff0c\u624d\u80fd\u88ab\u63d2\u5165\u6216\u66f4\u65b0\u5230\u8cc7\u6599\u8868\u4e2d\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0eOracle Check\u7d04\u675f\u7684\u6982\u5ff5\u3001\u7528\u6cd5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afcheck%e7%b4%84%e6%9d%9f%ef%bc%9f-njnDySiWpP\">\u4ec0\u9ebc\u662fCheck\u7d04\u675f\uff1f<\/h2>\n<p>Check\u7d04\u675f\u662f\u4e00\u7a2e\u7528\u65bc\u9650\u5236\u8cc7\u6599\u8868\u4e2d\u67d0\u4e00\u5217\u6216\u591a\u5217\u7684\u503c\u7684\u898f\u5247\u3002\u5b83\u53ef\u4ee5\u78ba\u4fdd\u8cc7\u6599\u7684\u6709\u6548\u6027\uff0c\u9632\u6b62\u4e0d\u7b26\u5408\u696d\u52d9\u908f\u8f2f\u7684\u8cc7\u6599\u88ab\u5beb\u5165\u8cc7\u6599\u5eab\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6709\u4e00\u500b\u54e1\u5de5\u8cc7\u6599\u8868\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u5e74\u9f61\u6b04\u4f4d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Check\u7d04\u675f\u4f86\u78ba\u4fdd\u5e74\u9f61\u7684\u503c\u5fc5\u9808\u5927\u65bc\u7b49\u65bc18\u6b72\u3002<\/p>\n<h2 id=\"check%e7%b4%84%e6%9d%9f%e7%9a%84%e8%aa%9e%e6%b3%95-njnDySiWpP\">Check\u7d04\u675f\u7684\u8a9e\u6cd5<\/h2>\n<p>\u5728Oracle\u4e2d\uff0cCheck\u7d04\u675f\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE table_name (\n    column_name data_type,\n    ...\n    CONSTRAINT constraint_name CHECK (condition)\n);<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5177\u9ad4\u7684\u4f8b\u5b50\uff0c\u5c55\u793a\u5982\u4f55\u5728\u5275\u5efa\u8cc7\u6599\u8868\u6642\u4f7f\u7528Check\u7d04\u675f\uff1a<\/p>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID NUMBER PRIMARY KEY,\n    Name VARCHAR2(100),\n    Age NUMBER,\n    Salary NUMBER,\n    CONSTRAINT chk_age CHECK (Age &gt;= 18)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`chk_age`\u662fCheck\u7d04\u675f\u7684\u540d\u7a31\uff0c\u689d\u4ef6\u662f`Age &gt;= 18`\uff0c\u9019\u610f\u5473\u8457\u53ea\u6709\u5e74\u9f61\u5927\u65bc\u6216\u7b49\u65bc18\u7684\u54e1\u5de5\u624d\u80fd\u88ab\u63d2\u5165\u5230`Employees`\u8868\u4e2d\u3002<\/p>\n<h2 id=\"check%e7%b4%84%e6%9d%9f%e7%9a%84%e7%89%b9%e9%bb%9e-njnDySiWpP\">Check\u7d04\u675f\u7684\u7279\u9ede<\/h2>\n<ul>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>Check\u7d04\u675f\u53ef\u4ee5\u7528\u65bc\u55ae\u500b\u6b04\u4f4d\u6216\u591a\u500b\u6b04\u4f4d\u7684\u7d44\u5408\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u8cc7\u6599\u9a57\u8b49\u65b9\u5f0f\u3002<\/li>\n<li><strong>\u5373\u6642\u9a57\u8b49\uff1a<\/strong>\u7576\u63d2\u5165\u6216\u66f4\u65b0\u8cc7\u6599\u6642\uff0cOracle\u6703\u81ea\u52d5\u6aa2\u67e5Check\u7d04\u675f\uff0c\u78ba\u4fdd\u8cc7\u6599\u7684\u6709\u6548\u6027\u3002<\/li>\n<li><strong>\u53ef\u8b80\u6027\uff1a<\/strong>\u4f7f\u7528Check\u7d04\u675f\u53ef\u4ee5\u4f7f\u8cc7\u6599\u8868\u7684\u7d50\u69cb\u66f4\u52a0\u6e05\u6670\uff0c\u56e0\u70ba\u5b83\u660e\u78ba\u5b9a\u7fa9\u4e86\u8cc7\u6599\u7684\u6709\u6548\u7bc4\u570d\u3002<\/li>\n<\/ul>\n<h2 id=\"check%e7%b4%84%e6%9d%9f%e7%9a%84%e9%99%90%e5%88%b6-njnDySiWpP\">Check\u7d04\u675f\u7684\u9650\u5236<\/h2>\n<p>\u5118\u7ba1Check\u7d04\u675f\u5728\u8cc7\u6599\u9a57\u8b49\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5b83\u4e5f\u6709\u4e00\u4e9b\u9650\u5236\uff1a<\/p>\n<ul>\n<li>Check\u7d04\u675f\u4e0d\u80fd\u5f15\u7528\u5176\u4ed6\u8cc7\u6599\u8868\u7684\u6b04\u4f4d\uff0c\u9019\u610f\u5473\u8457\u5b83\u53ea\u80fd\u5728\u7576\u524d\u8cc7\u6599\u8868\u5167\u90e8\u9032\u884c\u9a57\u8b49\u3002<\/li>\n<li>\u8907\u96dc\u7684\u689d\u4ef6\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u5927\u578b\u8cc7\u6599\u8868\u4e2d\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cCheck\u7d04\u675f\u53ef\u80fd\u7121\u6cd5\u6355\u6349\u5230\u6240\u6709\u7684\u696d\u52d9\u908f\u8f2f\uff0c\u9019\u9700\u8981\u984d\u5916\u7684\u61c9\u7528\u5c64\u9a57\u8b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e4%b8%ad%e7%9a%84check%e7%b4%84%e6%9d%9f-njnDySiWpP\">\u5be6\u969b\u61c9\u7528\u4e2d\u7684Check\u7d04\u675f<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0cCheck\u7d04\u675f\u53ef\u4ee5\u7528\u65bc\u591a\u7a2e\u5834\u666f\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u96fb\u5b50\u5546\u52d9\u7cfb\u7d71\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528Check\u7d04\u675f\u4f86\u78ba\u4fdd\u5546\u54c1\u7684\u50f9\u683c\u4e0d\u70ba\u8ca0\u6578\uff1b\u5728\u4e00\u500b\u5b78\u6821\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u60a8\u53ef\u4ee5\u78ba\u4fdd\u5b78\u751f\u7684\u6210\u7e3e\u57280\u5230100\u4e4b\u9593\u3002\u9019\u4e9b\u7d04\u675f\u4e0d\u50c5\u63d0\u9ad8\u4e86\u8cc7\u6599\u7684\u5b8c\u6574\u6027\uff0c\u9084\u6e1b\u5c11\u4e86\u56e0\u8cc7\u6599\u932f\u8aa4\u800c\u5c0e\u81f4\u7684\u696d\u52d9\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-njnDySiWpP\">\u7e3d\u7d50<\/h2>\n<p>Oracle Check\u7d04\u675f\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u78ba\u4fdd\u8cc7\u6599\u7684\u6709\u6548\u6027\u548c\u5b8c\u6574\u6027\u3002\u901a\u904e\u5b9a\u7fa9\u689d\u4ef6\uff0cCheck\u7d04\u675f\u53ef\u4ee5\u9632\u6b62\u4e0d\u7b26\u5408\u696d\u52d9\u908f\u8f2f\u7684\u8cc7\u6599\u9032\u5165\u8cc7\u6599\u5eab\uff0c\u5f9e\u800c\u63d0\u9ad8\u8cc7\u6599\u7684\u8cea\u91cf\u3002\u5728\u8a2d\u8a08\u8cc7\u6599\u5eab\u6642\uff0c\u5408\u7406\u4f7f\u7528Check\u7d04\u675f\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u8cc7\u6599\u932f\u8aa4\uff0c\u63d0\u5347\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u5982<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u5c07\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Oracle Check\u7d04\u675f\u7684\u529f\u80fd\u8207\u61c9\u7528\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u8207\u6709\u6548\u6027\uff0c\u63d0\u5347\u8cc7\u6599\u5eab\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-195991","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195991","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=195991"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195991\/revisions"}],"predecessor-version":[{"id":195992,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195991\/revisions\/195992"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}