{"id":93974,"date":"2024-10-19T18:29:19","date_gmt":"2024-10-19T10:29:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/93974\/"},"modified":"2024-10-19T18:29:19","modified_gmt":"2024-10-19T10:29:19","slug":"oracle-pl-sql%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98%e5%8f%8a%e5%85%b6%e7%9b%b8%e9%97%9c%e6%a6%82%e5%bf%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/93974\/","title":{"rendered":"Oracle PL\/SQL\u57fa\u790e\u77e5\u8b58\u53ca\u5176\u76f8\u95dc\u6982\u5ff5"},"content":{"rendered":"<h1 id=\"oracle-pl-sql%e5%9f%ba%e7%a4%8e%e7%9f%a5%e8%ad%98%e5%8f%8a%e5%85%b6%e7%9b%b8%e9%97%9c%e6%a6%82%e5%bf%b5-isPTnytvjI\">Oracle PL\/SQL\u57fa\u790e\u77e5\u8b58\u53ca\u5176\u76f8\u95dc\u6982\u5ff5<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cOracle PL\/SQL\uff08Procedural Language\/Structured Query Language\uff09\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u61c9\u7528\u958b\u767c\u3002PL\/SQL\u7d50\u5408\u4e86SQL\u7684\u6578\u64da\u64cd\u4f5c\u80fd\u529b\u548c\u7a0b\u5e8f\u8a9e\u8a00\u7684\u63a7\u5236\u7d50\u69cb\uff0c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0ePL\/SQL\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u76f8\u95dc\u6280\u8853\u3002<\/p>\n<h2 id=\"pl-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-isPTnytvjI\">PL\/SQL\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>PL\/SQL\u662f\u4e00\u7a2e\u5c08\u70baOracle\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u7a0b\u5e8f\u8a9e\u8a00\uff0c\u5141\u8a31\u958b\u767c\u8005\u7de8\u5beb\u8907\u96dc\u7684\u6578\u64da\u64cd\u4f5c\u548c\u696d\u52d9\u908f\u8f2f\u3002\u5b83\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7d50\u69cb\u5316\uff1a<\/strong>PL\/SQL\u652f\u6301\u6a21\u584a\u5316\u7de8\u7a0b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5c07\u4ee3\u78bc\u7d44\u7e54\u6210\u7a0b\u5e8f\u55ae\u5143\uff0c\u5982\u904e\u7a0b\uff08Procedure\uff09\u548c\u51fd\u6578\uff08Function\uff09\u3002<\/li>\n<li><strong>\u932f\u8aa4\u8655\u7406\uff1a<\/strong>PL\/SQL\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u932f\u8aa4\u8655\u7406\u6a5f\u5236\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u4f7f\u7528\u7570\u5e38\u8655\u7406\u4f86\u6355\u7372\u548c\u8655\u7406\u904b\u884c\u6642\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u5c01\u88dd\uff1a<\/strong>PL\/SQL\u5141\u8a31\u5c07\u6578\u64da\u548c\u64cd\u4f5c\u5c01\u88dd\u5728\u4e00\u8d77\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"pl-sql%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-isPTnytvjI\">PL\/SQL\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>PL\/SQL\u7684\u57fa\u672c\u8a9e\u6cd5\u7d50\u69cb\u5305\u62ec\u8072\u660e\u90e8\u5206\u3001\u57f7\u884c\u90e8\u5206\u548c\u7570\u5e38\u8655\u7406\u90e8\u5206\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684PL\/SQL\u7a0b\u5e8f\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nDECLARE\n    v_employee_name VARCHAR2(100);\nBEGIN\n    SELECT employee_name INTO v_employee_name\n    FROM employees\n    WHERE employee_id = 101;\n\n    DBMS_OUTPUT.PUT_LINE('Employee Name: ' || v_employee_name);\nEXCEPTION\n    WHEN NO_DATA_FOUND THEN\n        DBMS_OUTPUT.PUT_LINE('No employee found with the given ID.');\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u8072\u660e\u4e86\u4e00\u500b\u8b8a\u91cf`v_employee_name`\uff0c\u7136\u5f8c\u4f7f\u7528`SELECT INTO`\u8a9e\u53e5\u5f9e`employees`\u8868\u4e2d\u67e5\u8a62\u54e1\u5de5\u59d3\u540d\u3002\u5982\u679c\u627e\u4e0d\u5230\u8a72\u54e1\u5de5\uff0c\u5247\u6703\u6355\u7372`NO_DATA_FOUND`\u7570\u5e38\u4e26\u8f38\u51fa\u76f8\u61c9\u7684\u6d88\u606f\u3002<\/p>\n<h2 id=\"pl-sql%e7%9a%84%e4%b8%bb%e8%a6%81%e7%b5%84%e4%bb%b6-isPTnytvjI\">PL\/SQL\u7684\u4e3b\u8981\u7d44\u4ef6<\/h2>\n<h3 id=\"1-%e8%ae%8a%e9%87%8f%e5%92%8c%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-isPTnytvjI\">1. \u8b8a\u91cf\u548c\u6578\u64da\u985e\u578b<\/h3>\n<p>PL\/SQL\u652f\u6301\u591a\u7a2e\u6578\u64da\u985e\u578b\uff0c\u5305\u62ec\u6578\u5b57\u3001\u5b57\u7b26\u3001\u65e5\u671f\u7b49\u3002\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u9700\u8981\u5b9a\u7fa9\u8b8a\u91cf\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>\nDECLARE\n    v_salary NUMBER(10, 2);\n    v_hire_date DATE;\nBEGIN\n    v_salary := 5000.00;\n    v_hire_date := SYSDATE;\nEND;\n<\/code><\/pre>\n<h3 id=\"2-%e6%8e%a7%e5%88%b6%e7%b5%90%e6%a7%8b-isPTnytvjI\">2. \u63a7\u5236\u7d50\u69cb<\/h3>\n<p>PL\/SQL\u63d0\u4f9b\u4e86\u591a\u7a2e\u63a7\u5236\u7d50\u69cb\uff0c\u5982\u689d\u4ef6\u8a9e\u53e5\uff08IF-THEN-ELSE\uff09\u3001\u5faa\u74b0\uff08LOOP\uff09\u7b49\u3002\u9019\u4e9b\u7d50\u69cb\u4f7f\u5f97\u7a0b\u5e8f\u80fd\u5920\u6839\u64da\u4e0d\u540c\u7684\u689d\u4ef6\u57f7\u884c\u4e0d\u540c\u7684\u64cd\u4f5c\u3002<\/p>\n<pre><code>\nDECLARE\n    v_count NUMBER := 0;\nBEGIN\n    FOR i IN 1..10 LOOP\n        v_count := v_count + i;\n    END LOOP;\n    DBMS_OUTPUT.PUT_LINE('Total Count: ' || v_count);\nEND;\n<\/code><\/pre>\n<h3 id=\"3-%e9%81%8e%e7%a8%8b%e5%92%8c%e5%87%bd%e6%95%b8-isPTnytvjI\">3. \u904e\u7a0b\u548c\u51fd\u6578<\/h3>\n<p>\u904e\u7a0b\u548c\u51fd\u6578\u662fPL\/SQL\u7684\u6838\u5fc3\u7d44\u4ef6\u3002\u904e\u7a0b\u662f\u4e00\u7d44\u57f7\u884c\u7279\u5b9a\u4efb\u52d9\u7684\u8a9e\u53e5\uff0c\u800c\u51fd\u6578\u5247\u662f\u8fd4\u56de\u503c\u7684\u904e\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u51fd\u6578\u793a\u4f8b\uff1a<\/p>\n<pre><code>\nCREATE OR REPLACE FUNCTION get_employee_name(p_id IN NUMBER) RETURN VARCHAR2 IS\n    v_name VARCHAR2(100);\nBEGIN\n    SELECT employee_name INTO v_name FROM employees WHERE employee_id = p_id;\n    RETURN v_name;\nEXCEPTION\n    WHEN NO_DATA_FOUND THEN\n        RETURN 'No employee found';\nEND;\n<\/code><\/pre>\n<h2 id=\"pl-sql%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-isPTnytvjI\">PL\/SQL\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>PL\/SQL\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u9a57\u8b49\u548c\u6e05\u7406\uff1a\u5728\u6578\u64da\u63d2\u5165\u6216\u66f4\u65b0\u6642\uff0c\u4f7f\u7528PL\/SQL\u9032\u884c\u6578\u64da\u9a57\u8b49\u3002<\/li>\n<li>\u6279\u91cf\u8655\u7406\uff1a\u4f7f\u7528PL\/SQL\u9032\u884c\u5927\u898f\u6a21\u6578\u64da\u8655\u7406\uff0c\u63d0\u9ad8\u6548\u7387\u3002<\/li>\n<li>\u696d\u52d9\u908f\u8f2f\u5be6\u73fe\uff1a\u5c07\u696d\u52d9\u908f\u8f2f\u5c01\u88dd\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6e1b\u5c11\u61c9\u7528\u5c64\u7684\u8ca0\u64d4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-isPTnytvjI\">\u7e3d\u7d50<\/h2>\n<p>Oracle PL\/SQL\u662f\u4e00\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u7de8\u7a0b\u8a9e\u8a00\uff0c\u9069\u5408\u7528\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u61c9\u7528\u958b\u767c\u3002\u901a\u904e\u638c\u63e1PL\/SQL\u7684\u57fa\u672c\u77e5\u8b58\u548c\u76f8\u95dc\u6982\u5ff5\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u548c\u5be6\u73fe\u696d\u52d9\u908f\u8f2f\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u96f2\u74b0\u5883\u4e2d\u904b\u884cPL\/SQL\u6709\u8208\u8da3\uff0c\u5efa\u8b70\u60a8\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u548c<a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u8cc7\u8a0a\uff0c\u4ee5\u4fbf\u9078\u64c7\u6700\u9069\u5408\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u958b\u767c\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22Oracle PL\/SQL\u7684\u57fa\u790e\u77e5\u8b58\u53ca\u76f8\u95dc\u6982\u5ff5\uff0c\u638c\u63e1\u6578\u64da\u5eab\u7de8\u7a0b\u7684\u6838\u5fc3\u6280\u80fd\uff0c\u63d0\u5347\u958b\u767c\u6548\u7387\u8207\u6027\u80fd\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-93974","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93974","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=93974"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93974\/revisions"}],"predecessor-version":[{"id":93975,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/93974\/revisions\/93975"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=93974"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=93974"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=93974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}