{"id":88004,"date":"2024-10-18T05:47:15","date_gmt":"2024-10-17T21:47:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/88004\/"},"modified":"2024-10-18T05:47:16","modified_gmt":"2024-10-17T21:47:16","slug":"ora-22951-order-%e6%96%b9%e6%b3%95%e8%bf%94%e5%9b%9e-null-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/88004\/","title":{"rendered":"ORA-22951: ORDER \u65b9\u6cd5\u8fd4\u56de NULL ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"ora-22951-order-%e6%96%b9%e6%b3%95%e8%bf%94%e5%9b%9e-null-oracle-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9-%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-WaBxuNmZXi\">ORA-22951: ORDER \u65b9\u6cd5\u8fd4\u56de NULL ORACLE \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f <code>ORA-22951<\/code> \u932f\u8aa4\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u5c0d\u8c61\u985e\u578b\u7684\u64cd\u4f5c\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u4f7f\u7528 ORDER \u65b9\u6cd5\u6642\u8fd4\u56de NULL \u503c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u9032\u884c\u6545\u969c\u4fee\u5fa9\u3002<\/p>\n<h2 id=\"ora-22951-%e9%8c%af%e8%aa%a4%e7%9a%84%e5%8e%9f%e5%9b%a0-WaBxuNmZXi\">ORA-22951 \u932f\u8aa4\u7684\u539f\u56e0<\/h2>\n<p><code>ORA-22951<\/code> \u932f\u8aa4\u901a\u5e38\u767c\u751f\u5728\u4f7f\u7528 Oracle \u7684\u5c0d\u8c61\u95dc\u4fc2\u6578\u64da\u5eab\u529f\u80fd\u6642\u3002\u7576\u4f60\u5617\u8a66\u5c0d\u4e00\u500b\u5c0d\u8c61\u985e\u578b\u7684\u96c6\u5408\u9032\u884c\u6392\u5e8f\u6642\uff0c\u5982\u679c\u8a72\u96c6\u5408\u4e2d\u5b58\u5728 NULL \u503c\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002\u9019\u662f\u56e0\u70ba Oracle \u5728\u6392\u5e8f\u904e\u7a0b\u4e2d\u7121\u6cd5\u8655\u7406 NULL \u503c\uff0c\u5f9e\u800c\u8fd4\u56de\u932f\u8aa4\u3002<\/p>\n<h3 id=\"%e5%b8%b8%e8%a6%8b%e5%a0%b4%e6%99%af-WaBxuNmZXi\">\u5e38\u898b\u5834\u666f<\/h3>\n<ul>\n<li>\u5728\u4f7f\u7528 PL\/SQL \u9032\u884c\u6578\u64da\u64cd\u4f5c\u6642\uff0c\u5c0d\u8c61\u985e\u578b\u7684\u96c6\u5408\u4e2d\u5305\u542b NULL \u503c\u3002<\/li>\n<li>\u5728\u57f7\u884c SQL \u67e5\u8a62\u6642\uff0c\u5c0d\u8c61\u985e\u578b\u7684\u5c6c\u6027\u672a\u6b63\u78ba\u521d\u59cb\u5316\u3002<\/li>\n<li>\u5728\u4f7f\u7528 ORDER BY \u5b50\u53e5\u6642\uff0c\u672a\u8003\u616e\u5230\u53ef\u80fd\u7684 NULL \u503c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9-ora-22951-%e9%8c%af%e8%aa%a4-WaBxuNmZXi\">\u5982\u4f55\u4fee\u5fa9 ORA-22951 \u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9 <code>ORA-22951<\/code> \u932f\u8aa4\u7684\u7b2c\u4e00\u6b65\u662f\u78ba\u5b9a\u5c0e\u81f4\u932f\u8aa4\u7684\u5177\u9ad4\u539f\u56e0\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e5%b0%8d%e8%b1%a1%e9%a1%9e%e5%9e%8b%e7%9a%84%e5%ae%9a%e7%be%a9-WaBxuNmZXi\">1. \u6aa2\u67e5\u5c0d\u8c61\u985e\u578b\u7684\u5b9a\u7fa9<\/h3>\n<p>\u78ba\u4fdd\u5c0d\u8c61\u985e\u578b\u7684\u5c6c\u6027\u5df2\u6b63\u78ba\u5b9a\u7fa9\uff0c\u4e26\u4e14\u5728\u63d2\u5165\u6578\u64da\u6642\u4e0d\u6703\u51fa\u73fe NULL \u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u6aa2\u67e5\u5c0d\u8c61\u985e\u578b\u7684\u5b9a\u7fa9\uff1a<\/p>\n<pre><code>SELECT * FROM user_types WHERE type_name = 'YOUR_OBJECT_TYPE';<\/code><\/pre>\n<h3 id=\"2-%e8%99%95%e7%90%86-null-%e5%80%bc-WaBxuNmZXi\">2. \u8655\u7406 NULL \u503c<\/h3>\n<p>\u5728\u9032\u884c\u6392\u5e8f\u4e4b\u524d\uff0c\u61c9\u8a72\u5148\u904e\u6ffe\u6389 NULL \u503c\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\u4f86\u904e\u6ffe NULL \u503c\uff1a<\/p>\n<pre><code>SELECT * FROM your_table WHERE your_column IS NOT NULL ORDER BY your_column;<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8-nvl-%e5%87%bd%e6%95%b8-WaBxuNmZXi\">3. \u4f7f\u7528 NVL \u51fd\u6578<\/h3>\n<p>\u5982\u679c\u9700\u8981\u4fdd\u7559 NULL \u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 Oracle \u7684 <code>NVL<\/code> \u51fd\u6578\u4f86\u66ff\u63db NULL \u503c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT NVL(your_column, 'default_value') FROM your_table ORDER BY NVL(your_column, 'default_value');<\/code><\/pre>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86-ora-22951-%e9%8c%af%e8%aa%a4-WaBxuNmZXi\">\u9060\u7a0b\u8655\u7406 ORA-22951 \u932f\u8aa4<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u9060\u7a0b\u8655\u7406 <code>ORA-22951<\/code> \u932f\u8aa4\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528\u9060\u7a0b\u9023\u63a5\u4f86\u8a2a\u554f\u6578\u64da\u5eab\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u9060\u7a0b\u9023\u63a5\u7684\u914d\u7f6e\u6b63\u78ba\uff0c\u5305\u62ec\u7db2\u7d61\u8a2d\u7f6e\u548c\u7528\u6236\u6b0a\u9650\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u5de5\u5177\uff08\u5982 SQL Developer \u6216 Toad\uff09\u4f86\u57f7\u884c\u67e5\u8a62\u548c\u8abf\u8a66\u3002<\/li>\n<li>\u5728\u9060\u7a0b\u74b0\u5883\u4e2d\u9032\u884c\u6e2c\u8a66\uff0c\u4ee5\u78ba\u4fdd\u554f\u984c\u4e0d\u50c5\u9650\u65bc\u672c\u5730\u74b0\u5883\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WaBxuNmZXi\">\u7e3d\u7d50<\/h2>\n<p>\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0c<code>ORA-22951<\/code> \u932f\u8aa4\u901a\u5e38\u8207\u5c0d\u8c61\u985e\u578b\u7684\u64cd\u4f5c\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u6392\u5e8f\u6642\u9047\u5230 NULL \u503c\u3002\u901a\u904e\u6aa2\u67e5\u5c0d\u8c61\u985e\u578b\u7684\u5b9a\u7fa9\u3001\u8655\u7406 NULL \u503c\u4ee5\u53ca\u4f7f\u7528\u9060\u7a0b\u9023\u63a5\u9032\u884c\u6545\u969c\u6392\u9664\uff0c\u53ef\u4ee5\u6709\u6548\u89e3\u6c7a\u6b64\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u80fd\u548c\u7a69\u5b9a\u6027\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u53ef\u9760\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a ORA-22951 \u932f\u8aa4\uff0c\u4e86\u89e3 ORDER \u65b9\u6cd5\u8fd4\u56de NULL \u7684\u539f\u56e0\uff0c\u63d0\u4f9b\u6709\u6548\u7684\u6545\u969c\u4fee\u5fa9\u548c\u9060\u7a0b\u8655\u7406\u65b9\u6848\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-88004","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/88004","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=88004"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/88004\/revisions"}],"predecessor-version":[{"id":88005,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/88004\/revisions\/88005"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=88004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=88004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=88004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}