{"id":15763,"date":"2023-12-04T22:44:36","date_gmt":"2023-12-04T14:44:36","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15763"},"modified":"2023-12-04T22:47:54","modified_gmt":"2023-12-04T14:47:54","slug":"oracle-zhong-ru-he-pan-duan-you-biao-shi-fou-dao-l","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-ru-he-pan-duan-you-biao-shi-fou-dao-l\/","title":{"rendered":"Oracle \u4e2d\u5982\u4f55\u5224\u65ad\u6e38\u6807\u662f\u5426\u5230\u4e86\u672b\u5c3e\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6e38\u6807\u5c5e\u6027 <code>SQL%NOTFOUND<\/code> \u6216 <code>SQL%ROWCOUNT<\/code> \u6765\u5224\u65ad\u6e38\u6807\u662f\u5426\u5230\u4e86\u672b\u5c3e\u3002\u8fd9\u4e24\u4e2a\u5c5e\u6027\u662f PL\/SQL \u4e2d\u7684\u9690\u5f0f\u6e38\u6807\u5c5e\u6027\uff0c\u7528\u4e8e\u5224\u65ad\u6e38\u6807\u662f\u5426\u8fd4\u56de\u4e86\u7ed3\u679c\u884c\u3002<\/p>\n<ol>\n<li><strong>\u4f7f\u7528 <code>SQL%NOTFOUND<\/code>\uff1a<\/strong>\n<ul>\n<li><code>SQL%NOTFOUND<\/code> \u662f\u4e00\u4e2a\u5e03\u5c14\u578b\u7684\u6e38\u6807\u5c5e\u6027\uff0c\u5982\u679c\u6e38\u6807\u7684\u6700\u540e\u4e00\u6b21 FETCH \u64cd\u4f5c\u6ca1\u6709\u68c0\u7d22\u5230\u6570\u636e\uff0c\u5b83\u5c06\u8fd4\u56de TRUE\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">OPEN cursor_name;\nFETCH cursor_name INTO variable1, variable2;\nIF cursor_name%NOTFOUND THEN\n -- \u6e38\u6807\u5230\u8fbe\u672b\u5c3e\uff0c\u6ca1\u6709\u66f4\u591a\u6570\u636e\u53ef\u7528\n DBMS_OUTPUT.PUT_LINE('No more rows found.');\nEND IF;\nCLOSE cursor_name;\n<\/code><\/pre>\n<\/li>\n<li><strong>\u4f7f\u7528 <code>SQL%ROWCOUNT<\/code>\uff1a<\/strong>\n<ul>\n<li><code>SQL%ROWCOUNT<\/code> \u8fd4\u56de\u4e0a\u4e00\u6b21 SQL \u8bed\u53e5\u5f71\u54cd\u7684\u884c\u6570\uff0c\u5982\u679c FETCH \u64cd\u4f5c\u6ca1\u6709\u68c0\u7d22\u5230\u6570\u636e\uff0c\u5b83\u5c06\u8fd4\u56de 0\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-sql  line-numbers\">OPEN cursor_name;\nFETCH cursor_name INTO variable1, variable2;\nIF cursor_name%ROWCOUNT = 0 THEN\n -- \u6e38\u6807\u5230\u8fbe\u672b\u5c3e\uff0c\u6ca1\u6709\u66f4\u591a\u6570\u636e\u53ef\u7528\n DBMS_OUTPUT.PUT_LINE('No more rows found.');\nEND IF;\nCLOSE cursor_name;\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u4e24\u8005\u7684\u9009\u62e9\u901a\u5e38\u53d6\u51b3\u4e8e\u4e2a\u4eba\u504f\u597d\u548c\u4ee3\u7801\u4e0a\u4e0b\u6587\u3002\u4f7f\u7528 <code>SQL%NOTFOUND<\/code> \u66f4\u52a0\u76f4\u89c2\uff0c\u800c <code>SQL%ROWCOUNT<\/code> \u53ef\u4ee5\u5728 FETCH \u64cd\u4f5c\u4e4b\u540e\u7684\u4efb\u4f55\u5730\u65b9\u4f7f\u7528\uff0c\u56e0\u4e3a\u5b83\u8fd4\u56de\u4e0a\u4e00\u6b21\u8bed\u53e5\u5f71\u54cd\u7684\u884c\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u6e38\u6807\u5c5e\u6027 SQL%NOTFOUND \u6216 SQL%ROWCOUNT \u6765\u5224\u65ad\u6e38\u6807\u662f\u5426 [&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-15763","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15763","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=15763"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15763\/revisions"}],"predecessor-version":[{"id":15764,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15763\/revisions\/15764"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15763"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}