{"id":190850,"date":"2024-11-12T15:32:22","date_gmt":"2024-11-12T07:32:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/190850\/"},"modified":"2024-11-12T15:32:23","modified_gmt":"2024-11-12T07:32:23","slug":"%e4%b8%8b%e4%bd%bf%e7%94%a8-pl-sql-%e9%80%b2%e8%a1%8c%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e7%9a%84%e5%b7%ae%e7%95%b0-plsql%e4%b8%8d%e5%90%8c%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/190850\/","title":{"rendered":"\u4e0b\u4f7f\u7528 PL\/SQL \u9032\u884c\u5b58\u5132\u904e\u7a0b\u7684\u5dee\u7570 (plsql\u4e0d\u540c\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e4%b8%8b%e4%bd%bf%e7%94%a8-pl-sql-%e9%80%b2%e8%a1%8c%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e7%9a%84%e5%b7%ae%e7%95%b0-pl-sql-%e4%b8%8d%e5%90%8c%e6%95%b8%e6%93%9a%e5%ba%ab-zoPLCiTXTQ\">\u4e0b\u4f7f\u7528 PL\/SQL \u9032\u884c\u5b58\u5132\u904e\u7a0b\u7684\u5dee\u7570 (PL\/SQL \u4e0d\u540c\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cPL\/SQL\uff08Procedural Language\/Structured Query Language\uff09\u662f\u4e00\u7a2e\u5ee3\u6cdb\u4f7f\u7528\u7684\u7a0b\u5e8f\u8a2d\u8a08\u8a9e\u8a00\uff0c\u4e3b\u8981\u7528\u65bc Oracle \u6578\u64da\u5eab\u3002PL\/SQL \u5141\u8a31\u958b\u767c\u8005\u7de8\u5beb\u8907\u96dc\u7684\u6578\u64da\u5eab\u61c9\u7528\u7a0b\u5e8f\uff0c\u4e26\u80fd\u5920\u5728\u6578\u64da\u5eab\u4e2d\u57f7\u884c\u908f\u8f2f\u904b\u7b97\u3001\u63a7\u5236\u6d41\u7a0b\u548c\u8655\u7406\u932f\u8aa4\u3002\u7136\u800c\uff0c\u96a8\u8457\u4e0d\u540c\u6578\u64da\u5eab\u7cfb\u7d71\u7684\u51fa\u73fe\uff0cPL\/SQL \u7684\u5be6\u73fe\u548c\u529f\u80fd\u4e5f\u6709\u6240\u4e0d\u540c\u3002\u672c\u6587\u5c07\u63a2\u8a0e PL\/SQL \u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e2d\u7684\u5b58\u5132\u904e\u7a0b\u5dee\u7570\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5177\u9ad4\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"pl-sql-%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-zoPLCiTXTQ\">PL\/SQL \u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>PL\/SQL \u662f Oracle \u6578\u64da\u5eab\u7684\u5c08\u6709\u8a9e\u8a00\uff0c\u7d50\u5408\u4e86 SQL \u7684\u5f37\u5927\u67e5\u8a62\u80fd\u529b\u548c\u7a0b\u5e8f\u8a9e\u8a00\u7684\u63a7\u5236\u7d50\u69cb\u3002\u5b83\u7684\u4e3b\u8981\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u652f\u6301\u8b8a\u91cf\u548c\u6578\u64da\u985e\u578b\u7684\u5b9a\u7fa9<\/li>\n<li>\u63d0\u4f9b\u689d\u4ef6\u8a9e\u53e5\u548c\u5faa\u74b0\u7d50\u69cb<\/li>\n<li>\u652f\u6301\u932f\u8aa4\u8655\u7406\u6a5f\u5236<\/li>\n<li>\u80fd\u5920\u5275\u5efa\u5b58\u5132\u904e\u7a0b\u3001\u51fd\u6578\u548c\u89f8\u767c\u5668<\/li>\n<\/ul>\n<h2 id=\"%e4%b8%8d%e5%90%8c%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%9a%84-pl-sql-%e5%af%a6%e7%8f%be-zoPLCiTXTQ\">\u4e0d\u540c\u6578\u64da\u5eab\u4e2d\u7684 PL\/SQL \u5be6\u73fe<\/h2>\n<p>\u96d6\u7136 PL\/SQL \u662f Oracle \u7684\u5c08\u6709\u8a9e\u8a00\uff0c\u4f46\u5176\u4ed6\u6578\u64da\u5eab\u7cfb\u7d71\u4e5f\u6709\u985e\u4f3c\u7684\u529f\u80fd\u3002\u4ee5\u4e0b\u662f\u5e7e\u500b\u4e3b\u8981\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d PL\/SQL \u7684\u5be6\u73fe\u5dee\u7570\uff1a<\/p>\n<h3 id=\"1-oracle-%e6%95%b8%e6%93%9a%e5%ba%ab-zoPLCiTXTQ\">1. Oracle \u6578\u64da\u5eab<\/h3>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0cPL\/SQL \u662f\u4e00\u500b\u5b8c\u6574\u7684\u7a0b\u5e8f\u8a2d\u8a08\u8a9e\u8a00\uff0c\u652f\u6301\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5b58\u5132\u904e\u7a0b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE OR REPLACE PROCEDURE get_employee_salary (emp_id IN NUMBER, emp_salary OUT NUMBER) AS\nBEGIN\n    SELECT salary INTO emp_salary FROM employees WHERE employee_id = emp_id;\nEXCEPTION\n    WHEN NO_DATA_FOUND THEN\n        emp_salary := 0;\nEND;<\/code><\/pre>\n<p>\u9019\u500b\u5b58\u5132\u904e\u7a0b\u63a5\u53d7\u4e00\u500b\u54e1\u5de5 ID\uff0c\u4e26\u8fd4\u56de\u8a72\u54e1\u5de5\u7684\u85aa\u6c34\u3002\u5982\u679c\u627e\u4e0d\u5230\u8a72\u54e1\u5de5\uff0c\u5247\u8fd4\u56de 0\u3002<\/p>\n<h3 id=\"2-postgresql-zoPLCiTXTQ\">2. PostgreSQL<\/h3>\n<p>PostgreSQL \u4f7f\u7528 PL\/pgSQL \u4f5c\u70ba\u5176\u7a0b\u5e8f\u8a2d\u8a08\u8a9e\u8a00\uff0c\u96d6\u7136\u8a9e\u6cd5\u8207 PL\/SQL \u985e\u4f3c\uff0c\u4f46\u5728\u67d0\u4e9b\u65b9\u9762\u6709\u6240\u4e0d\u540c\u3002\u4f8b\u5982\uff0cPostgreSQL \u4e0d\u652f\u6301 Oracle \u7684\u67d0\u4e9b\u7279\u6027\uff0c\u5982\u5305\uff08Packages\uff09\u3002\u4ee5\u4e0b\u662f PostgreSQL \u4e2d\u7684\u5b58\u5132\u904e\u7a0b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE OR REPLACE FUNCTION get_employee_salary(emp_id INT) RETURNS INT AS $$\nDECLARE\n    emp_salary INT;\nBEGIN\n    SELECT salary INTO emp_salary FROM employees WHERE employee_id = emp_id;\n    RETURN emp_salary;\nEXCEPTION\n    WHEN NO_DATA_FOUND THEN\n        RETURN 0;\nEND;\n$$ LANGUAGE plpgsql;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u4f7f\u7528\u4e86 RETURN \u8a9e\u53e5\u4f86\u8fd4\u56de\u85aa\u6c34\uff0c\u800c\u4e0d\u662f\u4f7f\u7528 OUT \u53c3\u6578\u3002<\/p>\n<h3 id=\"3-microsoft-sql-server-zoPLCiTXTQ\">3. Microsoft SQL Server<\/h3>\n<p>\u5728 Microsoft SQL Server \u4e2d\uff0c\u4f7f\u7528 T-SQL\uff08Transact-SQL\uff09\u4f5c\u70ba\u5176\u7a0b\u5e8f\u8a2d\u8a08\u8a9e\u8a00\u3002T-SQL \u7684\u8a9e\u6cd5\u8207 PL\/SQL \u548c PL\/pgSQL \u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b T-SQL \u5b58\u5132\u904e\u7a0b\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE PROCEDURE get_employee_salary\n    @emp_id INT,\n    @emp_salary INT OUTPUT\nAS\nBEGIN\n    SELECT @emp_salary = salary FROM employees WHERE employee_id = @emp_id;\n    IF @@ROWCOUNT = 0\n        SET @emp_salary = 0;\nEND;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c\u4f7f\u7528 OUTPUT \u53c3\u6578\u4f86\u8fd4\u56de\u85aa\u6c34\uff0c\u4e26\u4f7f\u7528 @@ROWCOUNT \u4f86\u6aa2\u67e5\u662f\u5426\u627e\u5230\u4e86\u8a72\u54e1\u5de5\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-zoPLCiTXTQ\">\u7e3d\u7d50<\/h2>\n<p>PL\/SQL \u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e2d\u7684\u5be6\u73fe\u5b58\u5728\u986f\u8457\u5dee\u7570\uff0c\u9019\u4e9b\u5dee\u7570\u4e3b\u8981\u9ad4\u73fe\u5728\u8a9e\u6cd5\u3001\u529f\u80fd\u548c\u7279\u6027\u4e0a\u3002Oracle \u7684 PL\/SQL \u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\uff0c\u800c PostgreSQL \u548c SQL Server \u5247\u5404\u81ea\u6709\u5176\u7368\u7279\u7684\u5be6\u73fe\u65b9\u5f0f\u3002\u4e86\u89e3\u9019\u4e9b\u5dee\u7570\u5c0d\u65bc\u958b\u767c\u8005\u5728\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u6642\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u4e0d\u540c\u9700\u6c42\u7684\u7528\u6236\u3002\u7121\u8ad6\u662f <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\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 PL\/SQL \u5728\u4e0d\u540c\u6578\u64da\u5eab\u4e2d\u4f7f\u7528\u5b58\u5132\u904e\u7a0b\u7684\u5dee\u7570\uff0c\u4e86\u89e3\u5176\u7279\u6027\u3001\u6027\u80fd\u548c\u6700\u4f73\u5be6\u8e10\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-190850","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190850","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=190850"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190850\/revisions"}],"predecessor-version":[{"id":190851,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190850\/revisions\/190851"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=190850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=190850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=190850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}