{"id":1664,"date":"2018-04-22T17:48:25","date_gmt":"2018-04-22T09:48:25","guid":{"rendered":"http:\/\/www.821121.com\/?p=1664"},"modified":"2022-04-22T17:52:18","modified_gmt":"2022-04-22T09:52:18","slug":"oracle%e5%88%86%e9%a1%b5%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=1664","title":{"rendered":"Oracle\u5206\u9875\u67e5\u8be2"},"content":{"rendered":"<h3>1\u00a0\u5206\u9875\u67e5\u8be2<\/h3>\n<p>\u4e0d\u80fd\u5bf9 rownum \u4f7f\u7528 &gt;\uff08\u5927\u4e8e\u6216\u7b49\u4e8e 1 \u7684\u6570\u503c\uff09\u3001&gt;=\uff08\u5927\u4e8e 1 \u7684\u6570\u503c\uff09=\uff08\u4e0d\u7b49\u4e8e 1 \u7684\u6570\u503c\uff09\uff0c\u5426\u5219\u65e0\u7ed3\u679c\u3002\u6240\u4ee5\u76f4\u63a5\u7528 rownum \u7684\u65f6\u5019\u53ea\u80fd\u4ece 1 \u5f00\u59cb\uff0c\u6bd4\u5982 rownum &gt;1 \u6ca1\u6709\u8bb0\u5f55\uff0c\u56e0\u4e3a\u7b2c\u4e00\u6761\u4e0d\u6ee1\u8db3\u53bb\u6389\u7684\u8bdd\uff0c\u7b2c\u4e8c\u6761\u7684 rownum \u53c8\u6210\u4e86 1\uff0c\u6240\u4ee5\u6c38\u8fdc\u6ca1\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u3002<\/p>\n<pre><code class=\"language-sql\">--\u6b63\u786e\nselect * from employees where rownum &gt;= 1;\n--\u9519\u8bef\nselect * from employees where rownum &gt;1 or rownum &gt;=2 or rownum =0 or rownum &lt;1;<\/code><\/pre>\n<h3>2 \u4e0d\u4ece\u5934\u5f00\u59cb\u67e5\u8be2<\/h3>\n<p>\u65b9\u6cd5\u4e00<\/p>\n<pre><code class=\"language-sql\">select * from (\n \u00a0 \u00a0select rownum as rnum,e.* \n \u00a0 \u00a0from employees e \n \u00a0 \u00a0where rownum &lt;= 4\n) \nwhere rnum &gt;= 2 ;<\/code><\/pre>\n<p>-\u65b9\u6cd5\u4e8c<\/p>\n<pre><code class=\"language-sql\">select * from (\n \u00a0 \u00a0select rownum as rnum,e.*\n \u00a0 \u00a0from employees e\n)\nwhere rnum between 2 and 4 ;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1\u00a0\u5206\u9875\u67e5\u8be2 \u4e0d\u80fd\u5bf9 rownum \u4f7f\u7528 &gt;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1664","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1664","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=1664"}],"version-history":[{"count":2,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1664\/revisions"}],"predecessor-version":[{"id":1729,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/1664\/revisions\/1729"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1664"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}