{"id":95994,"date":"2024-10-20T05:43:16","date_gmt":"2024-10-19T21:43:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/95994\/"},"modified":"2024-10-20T05:43:17","modified_gmt":"2024-10-19T21:43:17","slug":"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9%e8%ae%8a%e9%87%8f-oracle%e6%95%b8%e6%93%9a%e5%ba%ab-%e5%ae%9a%e7%be%a9%e8%ae%8a%e9%87%8f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/95994\/","title":{"rendered":"Oracle\u6578\u64da\u5eab\u4e2d\u5982\u4f55\u5b9a\u7fa9\u8b8a\u91cf (oracle\u6578\u64da\u5eab \u5b9a\u7fa9\u8b8a\u91cf)"},"content":{"rendered":"<h1 id=\"oracle%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9%e8%ae%8a%e9%87%8f-LaMujffUry\">Oracle\u6578\u64da\u5eab\u4e2d\u5982\u4f55\u5b9a\u7fa9\u8b8a\u91cf<\/h1>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u8b8a\u91cf\u7684\u5b9a\u7fa9\u548c\u4f7f\u7528\u662f\u9032\u884c\u6578\u64da\u8655\u7406\u548c\u64cd\u4f5c\u7684\u57fa\u790e\u3002\u8b8a\u91cf\u53ef\u4ee5\u7528\u4f86\u5b58\u5132\u81e8\u6642\u6578\u64da\uff0c\u4e26\u5728PL\/SQL\u7a0b\u5e8f\u4e2d\u9032\u884c\u8a08\u7b97\u548c\u908f\u8f2f\u8655\u7406\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u5b9a\u7fa9\u8b8a\u91cf\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e8%ae%8a%e9%87%8f%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-LaMujffUry\">\u8b8a\u91cf\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u8b8a\u91cf\u662f\u7528\u4f86\u5b58\u5132\u6578\u64da\u7684\u547d\u540d\u5167\u5b58\u4f4d\u7f6e\u3002\u5728Oracle\u4e2d\uff0c\u8b8a\u91cf\u53ef\u4ee5\u662f\u6578\u5b57\u3001\u5b57\u7b26\u3001\u65e5\u671f\u7b49\u985e\u578b\u3002\u8b8a\u91cf\u7684\u5b9a\u7fa9\u901a\u5e38\u5728PL\/SQL\u584a\u4e2d\u9032\u884c\uff0c\u9019\u4e9b\u584a\u53ef\u4ee5\u662f\u5b58\u5132\u904e\u7a0b\u3001\u51fd\u6578\u6216\u533f\u540dPL\/SQL\u584a\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9%e8%ae%8a%e9%87%8f-LaMujffUry\">\u5982\u4f55\u5b9a\u7fa9\u8b8a\u91cf<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u8b8a\u91cf\u7684\u5b9a\u7fa9\u901a\u5e38\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>DECLARE\n    variable_name data_type [DEFAULT initial_value];\nBEGIN\n    -- PL\/SQL code\nEND;\n<\/code><\/pre>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%ae%9a%e7%be%a9%e6%95%b8%e5%ad%97%e8%ae%8a%e9%87%8f-LaMujffUry\">\u793a\u4f8b\uff1a\u5b9a\u7fa9\u6578\u5b57\u8b8a\u91cf<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u5b9a\u7fa9\u6578\u5b57\u8b8a\u91cf\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>DECLARE\n    v_salary NUMBER(10, 2) DEFAULT 5000.00;\nBEGIN\n    DBMS_OUTPUT.PUT_LINE('\u85aa\u6c34\u70ba: ' || v_salary);\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70ba <code>v_salary<\/code> \u7684\u8b8a\u91cf\uff0c\u6578\u64da\u985e\u578b\u70ba <code>NUMBER<\/code>\uff0c\u4e26\u8a2d\u7f6e\u4e86\u9ed8\u8a8d\u503c\u70ba5000.00\u3002\u7136\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 <code>DBMS_OUTPUT.PUT_LINE<\/code> \u8f38\u51fa\u8b8a\u91cf\u7684\u503c\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%ae%9a%e7%be%a9%e5%ad%97%e7%ac%a6%e8%ae%8a%e9%87%8f-LaMujffUry\">\u793a\u4f8b\uff1a\u5b9a\u7fa9\u5b57\u7b26\u8b8a\u91cf<\/h3>\n<p>\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u4f86\u770b\u770b\u5982\u4f55\u5b9a\u7fa9\u4e00\u500b\u5b57\u7b26\u8b8a\u91cf\uff1a<\/p>\n<pre><code>DECLARE\n    v_name VARCHAR2(50) DEFAULT 'John Doe';\nBEGIN\n    DBMS_OUTPUT.PUT_LINE('\u59d3\u540d\u70ba: ' || v_name);\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70ba <code>v_name<\/code> \u7684\u8b8a\u91cf\uff0c\u6578\u64da\u985e\u578b\u70ba <code>VARCHAR2<\/code>\uff0c\u4e26\u8a2d\u7f6e\u4e86\u9ed8\u8a8d\u503c\u70ba &#8216;John Doe&#8217;\u3002<\/p>\n<h2 id=\"%e8%ae%8a%e9%87%8f%e7%9a%84%e4%bd%9c%e7%94%a8%e5%9f%9f-LaMujffUry\">\u8b8a\u91cf\u7684\u4f5c\u7528\u57df<\/h2>\n<p>\u5728Oracle\u4e2d\uff0c\u8b8a\u91cf\u7684\u4f5c\u7528\u57df\u53d6\u6c7a\u65bc\u5176\u5b9a\u7fa9\u7684\u4f4d\u7f6e\u3002\u8b8a\u91cf\u53ef\u4ee5\u5728\u5168\u5c40\u6216\u5c40\u90e8\u7bc4\u570d\u5167\u4f7f\u7528\u3002\u5168\u5c40\u8b8a\u91cf\u5728\u6574\u500bPL\/SQL\u584a\u4e2d\u53ef\u7528\uff0c\u800c\u5c40\u90e8\u8b8a\u91cf\u50c5\u5728\u5176\u5b9a\u7fa9\u7684\u5340\u57df\u5167\u53ef\u7528\u3002<\/p>\n<h3 id=\"%e5%85%a8%e5%b1%80%e8%ae%8a%e9%87%8f%e7%a4%ba%e4%be%8b-LaMujffUry\">\u5168\u5c40\u8b8a\u91cf\u793a\u4f8b<\/h3>\n<pre><code>DECLARE\n    v_global NUMBER;\n    \n    PROCEDURE my_procedure IS\n    BEGIN\n        v_global := 100;\n    END my_procedure;\nBEGIN\n    my_procedure;\n    DBMS_OUTPUT.PUT_LINE('\u5168\u5c40\u8b8a\u91cf\u7684\u503c: ' || v_global);\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>v_global<\/code> \u662f\u4e00\u500b\u5168\u5c40\u8b8a\u91cf\uff0c\u53ef\u4ee5\u5728\u6574\u500bPL\/SQL\u584a\u4e2d\u4f7f\u7528\u3002<\/p>\n<h3 id=\"%e5%b1%80%e9%83%a8%e8%ae%8a%e9%87%8f%e7%a4%ba%e4%be%8b-LaMujffUry\">\u5c40\u90e8\u8b8a\u91cf\u793a\u4f8b<\/h3>\n<pre><code>DECLARE\n    PROCEDURE my_procedure IS\n        v_local NUMBER := 50;\n    BEGIN\n        DBMS_OUTPUT.PUT_LINE('\u5c40\u90e8\u8b8a\u91cf\u7684\u503c: ' || v_local);\n    END my_procedure;\nBEGIN\n    my_procedure;\n    -- \u9019\u88e1\u7121\u6cd5\u8a2a\u554f v_local\nEND;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>v_local<\/code> \u662f\u4e00\u500b\u5c40\u90e8\u8b8a\u91cf\uff0c\u53ea\u80fd\u5728 <code>my_procedure<\/code> \u4e2d\u4f7f\u7528\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-LaMujffUry\">\u7d50\u8ad6<\/h2>\n<p>\u5728Oracle\u6578\u64da\u5eab\u4e2d\uff0c\u8b8a\u91cf\u7684\u5b9a\u7fa9\u548c\u4f7f\u7528\u662f\u9032\u884c\u6578\u64da\u64cd\u4f5c\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u6b63\u78ba\u5730\u5b9a\u7fa9\u8b8a\u91cf\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u8655\u7406\u6578\u64da\u3002\u7121\u8ad6\u662f\u6578\u5b57\u3001\u5b57\u7b26\u9084\u662f\u65e5\u671f\u985e\u578b\u7684\u8b8a\u91cf\uff0c\u7406\u89e3\u5176\u4f5c\u7528\u57df\u548c\u4f7f\u7528\u65b9\u6cd5\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bcOracle\u6578\u64da\u5eab\u7684\u4f7f\u7528\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6216\u8005\u9700\u8981\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728Oracle\u6578\u64da\u5eab\u4e2d\u5b9a\u7fa9\u8b8a\u91cf\uff0c\u5305\u62ec\u6578\u64da\u985e\u578b\u3001\u7bc4\u570d\u53ca\u4f7f\u7528\u793a\u4f8b\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-95994","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95994","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=95994"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95994\/revisions"}],"predecessor-version":[{"id":95995,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/95994\/revisions\/95995"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=95994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=95994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=95994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}