{"id":199928,"date":"2025-05-06T09:48:04","date_gmt":"2025-05-06T01:48:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/199928\/"},"modified":"2025-05-06T09:48:04","modified_gmt":"2025-05-06T01:48:04","slug":"%e6%a3%80%e6%9f%a5%e6%95%b0%e6%8d%ae%e5%ba%93%e4%b8%ad%e6%98%af%e5%90%a6%e5%ad%98%e5%9c%a8%e8%a1%a8%e6%a0%bc%e7%9a%84oracle%e5%ad%98%e5%82%a8%e8%bf%87%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199928\/","title":{"rendered":"\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u8868\u683c\u7684Oracle\u5b58\u50a8\u8fc7\u7a0b"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u8868\u683c\u7684Oracle\u5b58\u50a8\u8fc7\u7a0b<\/h1>\n<p>\u6570\u636e\u5e93\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300a\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u8868\u683c\u7684Oracle\u5b58\u50a8\u8fc7\u7a0b\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p>\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u5b58\u50a8\u8fc7\u7a0b\u662f\u4e00\u79cd\u53ef\u4ee5\u4fdd\u5b58\u5e76\u91cd\u590d\u4f7f\u7528\u7684\u4e00\u7ec4SQL\u8bed\u53e5\u7684\u96c6\u5408\uff0c\u53ef\u4ee5\u5b9e\u73b0\u4e00\u5b9a\u7684\u903b\u8f91\u529f\u80fd\u3002\u5728\u7f16\u5199Oracle\u5b58\u50a8\u8fc7\u7a0b\u7684\u8fc7\u7a0b\u4e2d\u5e38\u5e38\u4f1a\u6d89\u53ca\u5230\u5224\u65ad\u6570\u636e\u5e93\u8868\u662f\u5426\u5b58\u5728\u7684\u9700\u6c42\uff0c\u4ee5\u4fbf\u5728\u540e\u7eed\u5904\u7406\u4e2d\u6839\u636e\u8868\u7684\u5b58\u5728\u4e0e\u5426\u505a\u51fa\u76f8\u5e94\u7684\u64cd\u4f5c\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u4ecb\u7ecd\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\uff0c\u5b9e\u73b0\u5224\u65ad\u6570\u636e\u5e93\u8868\u662f\u5426\u5b58\u5728\u7684\u529f\u80fd\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u5b58\u50a8\u8fc7\u7a0b\u6765\u5b9e\u73b0\u5224\u65ad\u6570\u636e\u5e93\u8868\u662f\u5426\u5b58\u5728\u7684\u529f\u80fd\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>CREATE OR REPLACE PROCEDURE check_table_exist(table_name IN VARCHAR2, table_exists OUT NUMBER)\nIS\n    table_count NUMBER;\nBEGIN\n    SELECT COUNT(*) INTO table_count\n    FROM user_tables\n    WHERE table_name = table_name;\n\n    IF table_count &gt; 0 THEN\n        table_exists := 1;  -- \u8868\u5b58\u5728\n        DBMS_OUTPUT.PUT_LINE('\u8868: ' || table_name || ' \u5b58\u5728');\n    ELSE\n        table_exists := 0;  -- \u8868\u4e0d\u5b58\u5728\n        DBMS_OUTPUT.PUT_LINE('\u8868: ' || table_name || ' \u4e0d\u5b58\u5728');\n    END IF;\nEND;\n\/<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u5b58\u50a8\u8fc7\u7a0b<code>check_table_exist<\/code>\uff0c\u53c2\u6570<code>table_name<\/code>\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u8868\u793a\u8981\u68c0\u67e5\u7684\u8868\u540d\uff1b\u53c2\u6570<code>table_exists<\/code>\u4e3a\u8f93\u51fa\u53c2\u6570\uff0c\u7528\u6765\u8fd4\u56de\u8868\u662f\u5426\u5b58\u5728\u7684\u7ed3\u679c\u3002\u5728\u5b58\u50a8\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u901a\u8fc7\u67e5\u8be2<code>user_tables<\/code>\u7cfb\u7edf\u89c6\u56fe\u6765\u5224\u65ad\u6307\u5b9a\u8868\u662f\u5426\u5b58\u5728\uff0c\u5982\u679c\u67e5\u8be2\u7ed3\u679c\u5927\u4e8e0\uff0c\u5219\u8868\u793a\u8868\u5b58\u5728\uff0c\u5426\u5219\u8868\u4e0d\u5b58\u5728\u3002<\/p>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u53ef\u4ee5\u8c03\u7528\u8fd9\u4e2a\u5b58\u50a8\u8fc7\u7a0b\u6765\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u6307\u5b9a\u7684\u8868\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n<pre>DECLARE\n    table_name VARCHAR2(50) := 'EMPLOYEES';\n    is_table_exist NUMBER;\nBEGIN\n    check_table_exist(table_name, is_table_exist);\n\n    IF is_table_exist = 1 THEN\n        DBMS_OUTPUT.PUT_LINE('\u8868\u5b58\u5728\uff0c\u53ef\u4ee5\u8fdb\u884c\u540e\u7eed\u64cd\u4f5c');\n        -- \u53ef\u4ee5\u5728\u8fd9\u91cc\u7f16\u5199\u9488\u5bf9\u8868\u5b58\u5728\u65f6\u7684\u903b\u8f91\u5904\u7406\u4ee3\u7801\n    ELSE\n        DBMS_OUTPUT.PUT_LINE('\u8868\u4e0d\u5b58\u5728\uff0c\u65e0\u6cd5\u8fdb\u884c\u540e\u7eed\u64cd\u4f5c');\n        -- \u53ef\u4ee5\u5728\u8fd9\u91cc\u7f16\u5199\u9488\u5bf9\u8868\u4e0d\u5b58\u5728\u65f6\u7684\u903b\u8f91\u5904\u7406\u4ee3\u7801\n    END IF;\nEND;<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u8c03\u7528\u4e86\u4e4b\u524d\u521b\u5efa\u7684\u5b58\u50a8\u8fc7\u7a0b<code>check_table_exist<\/code>\uff0c\u5e76\u4f20\u5165\u4e86\u8981\u68c0\u67e5\u7684\u8868\u540d<code>EMPLOYEES<\/code>\u3002\u6839\u636e\u5b58\u50a8\u8fc7\u7a0b\u7684\u8fd4\u56de\u7ed3\u679c\uff0c\u6211\u4eec\u53ef\u4ee5\u5224\u65ad\u8868\u662f\u5426\u5b58\u5728\uff0c\u5e76\u7f16\u5199\u9488\u5bf9\u8868\u5b58\u5728\u548c\u8868\u4e0d\u5b58\u5728\u65f6\u7684\u5904\u7406\u903b\u8f91\u3002<\/p>\n<p>\u901a\u8fc7\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9e\u73b0\u5728Oracle\u6570\u636e\u5e93\u4e2d\u5224\u65ad\u6570\u636e\u5e93\u8868\u662f\u5426\u5b58\u5728\u7684\u529f\u80fd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u5bf9\u5b58\u50a8\u8fc7\u7a0b\u8fdb\u884c\u8c03\u6574\u548c\u4f18\u5316\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u573a\u666f\u4e0b\u7684\u9700\u6c42\u3002<\/p>\n<p>\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6570\u636e\u5e93\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n<dl>\n<dt>\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>\u68c0\u67e5\u6570\u636e\u5e93\u4e2d\u662f\u5426\u5b58\u5728\u8868\u683c\u7684Ora&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-199928","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199928","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=199928"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199928\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}