{"id":15746,"date":"2023-12-04T22:15:50","date_gmt":"2023-12-04T14:15:50","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15746"},"modified":"2023-12-04T22:21:21","modified_gmt":"2023-12-04T14:21:21","slug":"oracle-ru-he-shi-yong-oracle-de-you-biao","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-ru-he-shi-yong-oracle-de-you-biao\/","title":{"rendered":"Oracle \u5982\u4f55\u4f7f\u7528 Oracle \u7684\u6e38\u6807\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u6e38\u6807\u662f\u7528\u4e8e\u5728 PL\/SQL \u4e2d\u5904\u7406\u67e5\u8be2\u7ed3\u679c\u7684\u4e00\u79cd\u673a\u5236\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Oracle \u6e38\u6807\u7684\u57fa\u672c\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li><strong>\u58f0\u660e\u6e38\u6807\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528 <code>DECLARE<\/code> \u5173\u952e\u5b57\u58f0\u660e\u6e38\u6807\uff0c\u5e76\u5b9a\u4e49\u67e5\u8be2\u7684 SELECT \u8bed\u53e5\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">DECLARE\n CURSOR cursor_name IS\n   SELECT column1, column2\n   FROM your_table\n   WHERE your_condition;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u6253\u5f00\u6e38\u6807\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528 <code>OPEN<\/code> \u8bed\u53e5\u6253\u5f00\u6e38\u6807\uff0c\u4f7f\u5176\u51c6\u5907\u597d\u6267\u884c\u67e5\u8be2\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">OPEN cursor_name;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u83b7\u53d6\u6570\u636e\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528 <code>FETCH INTO<\/code> \u8bed\u53e5\u4ece\u6e38\u6807\u4e2d\u83b7\u53d6\u4e00\u884c\u6216\u591a\u884c\u6570\u636e\uff0c\u5e76\u5b58\u50a8\u5728\u53d8\u91cf\u4e2d\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">FETCH cursor_name INTO variable1, variable2;\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<ul>\n<li>\u901a\u5e38\uff0c\u4f60\u9700\u8981\u5728\u4e00\u4e2a\u5faa\u73af\u4e2d\u53cd\u590d\u4f7f\u7528 <code>FETCH<\/code> \u8bed\u53e5\uff0c\u76f4\u5230\u6ca1\u6709\u66f4\u591a\u7684\u6570\u636e\u884c\u53ef\u7528\u3002<\/li>\n<\/ul>\n<ol start=\"4\">\n<li><strong>\u5173\u95ed\u6e38\u6807\uff1a<\/strong>\n<ul>\n<li>\u4f7f\u7528 <code>CLOSE<\/code> \u8bed\u53e5\u5173\u95ed\u6e38\u6807\uff0c\u91ca\u653e\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">CLOSE cursor_name;\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684 PL\/SQL \u4f8b\u5b50\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u4f7f\u7528\u6e38\u6807\uff1a<\/p>\n<pre><code class=\"language-sql  line-numbers\">DECLARE\n  CURSOR emp_cursor IS\n    SELECT employee_id, first_name, last_name\n    FROM employees\n    WHERE department_id = 10;\n\n  emp_id NUMBER;\n  emp_first_name VARCHAR2(50);\n  emp_last_name VARCHAR2(50);\nBEGIN\n  OPEN emp_cursor;\n  LOOP\n    FETCH emp_cursor INTO emp_id, emp_first_name, emp_last_name;\n    EXIT WHEN emp_cursor%NOTFOUND;\n\n    -- \u5904\u7406\u83b7\u53d6\u7684\u6570\u636e\uff0c\u4f8b\u5982\u8f93\u51fa\u5230\u5c4f\u5e55\n    DBMS_OUTPUT.PUT_LINE('Employee ID: ' || emp_id || ', Name: ' || emp_first_name || ' ' || emp_last_name);\n  END LOOP;\n  CLOSE emp_cursor;\nEND;\n\/\n<\/code><\/pre>\n<p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u9700\u8981\u6dfb\u52a0\u5f02\u5e38\u5904\u7406\u3001\u6761\u4ef6\u5224\u65ad\u7b49\u6765\u5b8c\u5584\u6e38\u6807\u7684\u4f7f\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u6e38\u6807\u662f\u7528\u4e8e\u5728 PL\/SQL \u4e2d\u5904\u7406\u67e5\u8be2\u7ed3\u679c\u7684\u4e00\u79cd\u673a\u5236\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528 Oracle \u6e38\u6807\u7684\u57fa [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15746","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15746"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15746\/revisions"}],"predecessor-version":[{"id":15747,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15746\/revisions\/15747"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15746"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}