{"id":15542,"date":"2023-12-04T20:37:27","date_gmt":"2023-12-04T12:37:27","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15542"},"modified":"2023-12-04T20:38:22","modified_gmt":"2023-12-04T12:38:22","slug":"oracle-zhong-shuo-xia-ru-he-shi-yong-oracle-de-you","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-shuo-xia-ru-he-shi-yong-oracle-de-you\/","title":{"rendered":"Oracle \u4e2d\u8bf4\u4e0b\u5982\u4f55\u4f7f\u7528 Oracle \u7684\u6e38\u6807\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\u4f7f\u7528\u6e38\u6807\uff08Cursor\uff09\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a<\/p>\n<ol>\n<li><strong>\u58f0\u660e\u6e38\u6807<\/strong>\uff1a\u9996\u5148\u9700\u8981\u58f0\u660e\u6e38\u6807\uff0c\u5e76\u5b9a\u4e49\u6e38\u6807\u7684\u67e5\u8be2\u8bed\u53e5\u3002\n<pre><code class=\"language-sql  line-numbers\">DECLARE\n  CURSOR cursor_name IS\n    SELECT column1, column2 FROM your_table WHERE condition;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u6253\u5f00\u6e38\u6807<\/strong>\uff1a\u4f7f\u7528 <code>OPEN<\/code> \u5173\u952e\u5b57\u6253\u5f00\u6e38\u6807\uff0c\u5c06\u67e5\u8be2\u7ed3\u679c\u96c6\u5b58\u50a8\u5728\u6e38\u6807\u4e2d\u3002\n<pre><code class=\"language-sql  line-numbers\">OPEN cursor_name;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u64cd\u4f5c\u6e38\u6807\u6570\u636e<\/strong>\uff1a\u901a\u8fc7\u5faa\u73af\u9010\u884c\u83b7\u53d6\u6e38\u6807\u4e2d\u7684\u6570\u636e\u3002\n<pre><code class=\"language-sql  line-numbers\">LOOP\n  FETCH cursor_name INTO variable1, variable2;\n  EXIT WHEN cursor_name%NOTFOUND; -- \u9000\u51fa\u5faa\u73af\u6761\u4ef6\n\n  -- \u5bf9\u83b7\u53d6\u7684\u6570\u636e\u6267\u884c\u64cd\u4f5c\n  -- \u53ef\u4ee5\u5728\u8fd9\u91cc\u5904\u7406\u6e38\u6807\u83b7\u53d6\u7684\u6570\u636e\n\nEND LOOP;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u5173\u95ed\u6e38\u6807<\/strong>\uff1a\u5728\u5b8c\u6210\u5bf9\u6e38\u6807\u6570\u636e\u7684\u64cd\u4f5c\u540e\uff0c\u4f7f\u7528 <code>CLOSE<\/code> \u5173\u952e\u5b57\u5173\u95ed\u6e38\u6807\u3002\n<pre><code class=\"language-sql  line-numbers\">CLOSE cursor_name;\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u5728\u4e0a\u8ff0\u6b65\u9aa4\u4e2d\uff1a<\/p>\n<ul>\n<li><code>DECLARE<\/code> \u7528\u4e8e\u58f0\u660e\u6e38\u6807\uff0c\u5e76\u5b9a\u4e49\u4e86\u67e5\u8be2\u8bed\u53e5\u3002<\/li>\n<li><code>OPEN<\/code> \u6253\u5f00\u6e38\u6807\uff0c\u6267\u884c\u67e5\u8be2\u5e76\u5c06\u7ed3\u679c\u96c6\u5b58\u50a8\u5728\u6e38\u6807\u4e2d\u3002<\/li>\n<li><code>LOOP<\/code> \u548c <code>FETCH<\/code> \u7528\u4e8e\u5faa\u73af\u904d\u5386\u6e38\u6807\u4e2d\u7684\u6570\u636e\uff0c<code>FETCH<\/code> \u8bed\u53e5\u5c06\u6bcf\u6b21\u83b7\u53d6\u7684\u6570\u636e\u5b58\u50a8\u5728\u6307\u5b9a\u7684\u53d8\u91cf\u4e2d\u3002<\/li>\n<li><code>EXIT WHEN<\/code> \u53ef\u4ee5\u7528\u6765\u5b9a\u4e49\u9000\u51fa\u5faa\u73af\u7684\u6761\u4ef6\u3002<\/li>\n<li><code>CLOSE<\/code> \u5173\u95ed\u6e38\u6807\uff0c\u91ca\u653e\u76f8\u5173\u8d44\u6e90\u3002<\/li>\n<\/ul>\n<p>\u4f7f\u7528\u6e38\u6807\u53ef\u4ee5\u9010\u884c\u5904\u7406\u67e5\u8be2\u7ed3\u679c\u96c6\uff0c\u5bf9\u6bcf\u4e00\u884c\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\u3002\u8fd9\u5bf9\u4e8e\u9700\u8981\u9010\u884c\u5904\u7406\u7ed3\u679c\u96c6\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528\uff0c\u6bd4\u5982\u5728\u5b58\u50a8\u8fc7\u7a0b\u6216\u6279\u5904\u7406\u4e2d\u6267\u884c\u590d\u6742\u7684\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\u4f7f\u7528\u6e38\u6807\uff08Cursor\uff09\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a \u58f0\u660e\u6e38\u6807\uff1a\u9996\u5148\u9700\u8981\u58f0\u660e\u6e38\u6807\uff0c\u5e76\u5b9a\u4e49\u6e38\u6807\u7684\u67e5 [&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-15542","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15542","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=15542"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15542\/revisions"}],"predecessor-version":[{"id":15544,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15542\/revisions\/15544"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15542"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15542"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15542"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}