{"id":95380,"date":"2024-10-20T00:34:17","date_gmt":"2024-10-19T16:34:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95380\/"},"modified":"2024-10-20T00:34:18","modified_gmt":"2024-10-19T16:34:18","slug":"oracle%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99%e8%a7%b8%e7%99%bc%e5%99%a8%e5%ad%98%e5%84%b2%e5%af%a6%e6%93%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95380\/","title":{"rendered":"Oracle\u4f7f\u7528\u6e38\u6a19\u89f8\u767c\u5668\u5b58\u5132\u5be6\u64cd"},"content":{"rendered":"<h1 id=\"oracle%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99%e8%a7%b8%e7%99%bc%e5%99%a8%e5%ad%98%e5%84%b2%e5%af%a6%e6%93%8d-CBGzYnJasy\">Oracle\u4f7f\u7528\u6e38\u6a19\u89f8\u767c\u5668\u5b58\u5132\u5be6\u64cd<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u6e38\u6a19\u548c\u89f8\u767c\u5668\u662f\u5169\u500b\u91cd\u8981\u7684\u6982\u5ff5\u3002\u6e38\u6a19\u5141\u8a31\u7528\u6236\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\uff0c\u800c\u89f8\u767c\u5668\u5247\u662f\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u7684\u7a0b\u5e8f\u3002\u7d50\u5408\u9019\u5169\u8005\uff0c\u53ef\u4ee5\u5be6\u73fe\u66f4\u9ad8\u6548\u7684\u6578\u64da\u64cd\u4f5c\u548c\u7ba1\u7406\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Oracle\u4e2d\u4f7f\u7528\u6e38\u6a19\u89f8\u767c\u5668\u9032\u884c\u5b58\u5132\u5be6\u64cd\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-CBGzYnJasy\">\u6e38\u6a19\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u6e38\u6a19\u662f\u4e00\u7a2e\u6578\u64da\u5eab\u5c0d\u8c61\uff0c\u7528\u65bc\u5f9e\u67e5\u8a62\u4e2d\u6aa2\u7d22\u6578\u64da\u3002\u5b83\u53ef\u4ee5\u88ab\u8996\u70ba\u4e00\u500b\u6307\u5411\u67e5\u8a62\u7d50\u679c\u96c6\u7684\u6307\u91dd\u3002\u6e38\u6a19\u5206\u70ba\u986f\u5f0f\u6e38\u6a19\u548c\u96b1\u5f0f\u6e38\u6a19\u5169\u7a2e\uff1a<\/p>\n<ul>\n<li><strong>\u986f\u5f0f\u6e38\u6a19\uff1a<\/strong>\u7528\u6236\u9700\u8981\u660e\u78ba\u5730\u5b9a\u7fa9\u548c\u63a7\u5236\u7684\u6e38\u6a19\uff0c\u901a\u5e38\u7528\u65bc\u8907\u96dc\u7684\u67e5\u8a62\u3002<\/li>\n<li><strong>\u96b1\u5f0f\u6e38\u6a19\uff1a<\/strong>\u7531Oracle\u81ea\u52d5\u7ba1\u7406\uff0c\u901a\u5e38\u7528\u65bc\u7c21\u55ae\u7684SQL\u8a9e\u53e5\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-CBGzYnJasy\">\u89f8\u767c\u5668\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u89f8\u767c\u5668\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u5b58\u5132\u904e\u7a0b\uff0c\u6703\u5728\u7279\u5b9a\u4e8b\u4ef6\uff08\u5982\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\uff09\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u3002\u89f8\u767c\u5668\u53ef\u4ee5\u7528\u4f86\u5f37\u5236\u57f7\u884c\u696d\u52d9\u898f\u5247\u3001\u9a57\u8b49\u6578\u64da\u5b8c\u6574\u6027\u6216\u81ea\u52d5\u8a18\u9304\u8b8a\u66f4\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99%e8%a7%b8%e7%99%bc%e5%99%a8%e7%9a%84%e5%af%a6%e6%93%8d%e6%ad%a5%e9%a9%9f-CBGzYnJasy\">\u4f7f\u7528\u6e38\u6a19\u89f8\u767c\u5668\u7684\u5be6\u64cd\u6b65\u9a5f<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528\u6e38\u6a19\u89f8\u767c\u5668\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e7%a4%ba%e4%be%8b%e8%a1%a8-CBGzYnJasy\">1. \u5275\u5efa\u4e00\u500b\u793a\u4f8b\u8868<\/h3>\n<pre><code>CREATE TABLE employees (\n    employee_id NUMBER PRIMARY KEY,\n    first_name VARCHAR2(50),\n    last_name VARCHAR2(50),\n    salary NUMBER\n);<\/code><\/pre>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e4%b8%80%e5%80%8b%e6%b8%b8%e6%a8%99-CBGzYnJasy\">2. \u5275\u5efa\u4e00\u500b\u6e38\u6a19<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u9700\u8981\u5275\u5efa\u4e00\u500b\u986f\u5f0f\u6e38\u6a19\u4f86\u67e5\u8a62\u54e1\u5de5\u7684\u85aa\u8cc7\u4fe1\u606f\u3002<\/p>\n<pre><code>DECLARE\n    CURSOR emp_cursor IS\n        SELECT employee_id, salary FROM employees;\n    emp_record emp_cursor%ROWTYPE;\nBEGIN\n    OPEN emp_cursor;\n    LOOP\n        FETCH emp_cursor INTO emp_record;\n        EXIT WHEN emp_cursor%NOTFOUND;\n        -- \u5728\u9019\u88e1\u53ef\u4ee5\u9032\u884c\u5176\u4ed6\u64cd\u4f5c\n    END LOOP;\n    CLOSE emp_cursor;\nEND;<\/code><\/pre>\n<h3 id=\"3-%e5%89%b5%e5%bb%ba%e8%a7%b8%e7%99%bc%e5%99%a8-CBGzYnJasy\">3. \u5275\u5efa\u89f8\u767c\u5668<\/h3>\n<p>\u73fe\u5728\uff0c\u6211\u5011\u5c07\u5275\u5efa\u4e00\u500b\u89f8\u767c\u5668\uff0c\u7576\u6709\u65b0\u54e1\u5de5\u63d2\u5165\u6642\uff0c\u81ea\u52d5\u66f4\u65b0\u67d0\u500b\u5b57\u6bb5\u6216\u57f7\u884c\u7279\u5b9a\u64cd\u4f5c\u3002<\/p>\n<pre><code>CREATE OR REPLACE TRIGGER trg_after_insert\nAFTER INSERT ON employees\nFOR EACH ROW\nBEGIN\n    -- \u9019\u88e1\u53ef\u4ee5\u4f7f\u7528\u6e38\u6a19\u4f86\u67e5\u8a62\u5176\u4ed6\u6578\u64da\n    DECLARE\n        CURSOR emp_cursor IS\n            SELECT salary FROM employees WHERE employee_id = :NEW.employee_id;\n        emp_record emp_cursor%ROWTYPE;\n    BEGIN\n        OPEN emp_cursor;\n        FETCH emp_cursor INTO emp_record;\n        -- \u5047\u8a2d\u6211\u5011\u8981\u6839\u64da\u85aa\u8cc7\u9032\u884c\u67d0\u4e9b\u64cd\u4f5c\n        IF emp_record.salary &gt; 50000 THEN\n            DBMS_OUTPUT.PUT_LINE('\u9ad8\u85aa\u54e1\u5de5: ' || :NEW.first_name || ' ' || :NEW.last_name);\n        END IF;\n        CLOSE emp_cursor;\n    END;\nEND;<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-CBGzYnJasy\">\u7e3d\u7d50<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u6e38\u6a19\u548c\u89f8\u767c\u5668\u7684\u7d50\u5408\u4f7f\u7528\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u9748\u6d3b\u6027\u548c\u6548\u7387\u3002\u901a\u904e\u4e0a\u8ff0\u793a\u4f8b\uff0c\u6211\u5011\u5c55\u793a\u4e86\u5982\u4f55\u5275\u5efa\u6e38\u6a19\u548c\u89f8\u767c\u5668\uff0c\u4e26\u5728\u7279\u5b9a\u4e8b\u4ef6\u767c\u751f\u6642\u81ea\u52d5\u57f7\u884c\u64cd\u4f5c\u3002\u9019\u7a2e\u6280\u8853\u5728\u6578\u64da\u5eab\u7ba1\u7406\u548c\u696d\u52d9\u908f\u8f2f\u5be6\u73fe\u4e2d\u5177\u6709\u91cd\u8981\u610f\u7fa9\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u4eab\u53d7\u9ad8\u6548\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle\u4e2d\u6e38\u6a19\u89f8\u767c\u5668\u7684\u5be6\u64cd\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u5eab\u6027\u80fd\uff0c\u5be6\u73fe\u81ea\u52d5\u5316\u7ba1\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-95380","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95380","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=95380"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95380\/revisions"}],"predecessor-version":[{"id":95381,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95380\/revisions\/95381"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}