{"id":1097,"date":"2015-04-20T16:48:02","date_gmt":"2015-04-20T08:48:02","guid":{"rendered":"http:\/\/www.821121.com\/?p=1097"},"modified":"2020-12-15T16:48:22","modified_gmt":"2020-12-15T08:48:22","slug":"oracle-sql%e8%af%ad%e5%8f%a5-%e4%b9%8b-%e7%bb%84%e5%90%88%e5%88%86%e6%9e%90%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1097","title":{"rendered":"Oracle SQL\u8bed\u53e5 \u4e4b \u7ec4\u5408\u5206\u6790\u51fd\u6570"},"content":{"rendered":"<h1>\u5b9a\u4e49<\/h1>\n<p>row_number() over\uff08\uff09 \u4e3a\u7ec4\u5408\u5206\u6790\u51fd\u6570\uff0c\u4e3b\u8981\u7528\u4e8e\u5355\u6b21\u67e5\u8be2\u4e2d\u65e2\u6d89\u53ca\u5206\u7ec4\u53c8\u6d89\u53ca\u6392\u5e8f\u7684\u9700\u6c42<\/p>\n<h1>\u8bed\u6cd5<\/h1>\n<p>row_number() over(partition by col1 order by col2[desc\/asc])\uff0c\u5176\u4e2d\uff1a<br \/>\n1\u3001partition by \u662f\u7528\u6765\u5206\u7ec4\u7684\uff0c\u7528\u4e86\u8fd9\u4e2a\u5c31\u53ef\u4ee5\u5b9e\u73b0\u5728\u7ec4\u5185\u8fdb\u884c\u6392\u5e8f\uff1b<br \/>\n2\u3001order by\u662f\u7528\u6765\u786e\u5b9a\u6392\u5e8f\u7684\u57fa\u51c6\u7684\uff0c\u53ef\u4f7f\u8f93\u51fa\u7ed3\u679c\u6309col2\u5217\u6765\u8fdb\u884c\u5347\u5e8f\u6216\u964d\u5e8f\u7684\u6392\u5e8f\uff1b<br \/>\n3\u3001\u6700\u5de6\u4fa7\u7684row_number() \u662f\u7528\u6765\u5bf9col1\u7ec4\u5185\u7684\u67e5\u8be2\u7ed3\u679c\uff0c\u6309\u7167col2\u7684\u6392\u5e8f\u8fdb\u884c\u7f16\u53f7\u3002<\/p>\n<h1>\u8fd4\u56de\u503c\u7c7b\u578b<\/h1>\n<p>\u53ef\u4ee5\u4e3a\u5b57\u7b26\u578b\u3001\u65e5\u671f\u578b\u3001\u65e5\u671f\u65f6\u95f4\u578b\u3001\u6570\u503c\u578b\u3001\u8d27\u5e01\u578b\u3001\u903b\u8f91\u578b\u6216null\u503c\u3002<\/p>\n<h1>\u4e3e\u4f8b<\/h1>\n<h2>\u672a\u52a0\u51fd\u6570<\/h2>\n<pre><code class=\"language-sql\">select ID,name,date1 from test<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/12\/image-1608021278033.png\" alt=\"file\" \/><\/p>\n<h2>\u52a0\u4e0a\u51fd\u6570<\/h2>\n<pre><code class=\"language-sql\">SELECT ID,NAME,DATE1,ROW_NUMBER() OVER(partition by ID order by DATE1 desc) as RN FROM test<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2020\/12\/image-1608021868325.png\" alt=\"file\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b9a\u4e49 row_number() over\uff08\uff09 \u4e3a\u7ec4<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-1097","post","type-post","status-publish","format-standard","hentry","category-sql"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1097","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1097"}],"version-history":[{"count":2,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1097\/revisions"}],"predecessor-version":[{"id":1107,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1097\/revisions\/1107"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1097"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1097"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}