{"id":15817,"date":"2023-12-04T22:59:37","date_gmt":"2023-12-04T14:59:37","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15817"},"modified":"2023-12-04T23:15:26","modified_gmt":"2023-12-04T15:15:26","slug":"oracle-zhong-shi-yong-oracle-wei-lie-shan-chu-biao","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-shi-yong-oracle-wei-lie-shan-chu-biao\/","title":{"rendered":"Oracle \u4e2d\u4f7f\u7528 Oracle \u4f2a\u5217\u5220\u9664\u8868\u4e2d\u7684\u91cd\u590d\u6570\u636e\u4e2d\u7684\u4e00\u6761\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>ROWID<\/code> \u4f2a\u5217\u6765\u5220\u9664\u8868\u4e2d\u7684\u91cd\u590d\u6570\u636e\u4e2d\u7684\u4e00\u6761\u3002\u4ee5\u4e0b\u662f\u4e00\u79cd\u57fa\u672c\u7684\u65b9\u6cd5\uff1a<\/p>\n<p>\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u540d\u4e3a <code>your_table<\/code> \u7684\u8868\uff0c\u6709\u4e00\u4e9b\u5217\u7528\u4e8e\u533a\u5206\u8bb0\u5f55\uff0c\u4f8b\u5982 <code>column1<\/code>, <code>column2<\/code>\uff0c\u7b49\u7b49\u3002\u4f60\u5e0c\u671b\u5220\u9664\u9664\u4e86\u4e00\u4e2a\u91cd\u590d\u8bb0\u5f55\u4e4b\u5916\u7684\u5176\u4ed6\u91cd\u590d\u8bb0\u5f55\u3002<\/p>\n<pre><code class=\"language-sql  line-numbers\">DELETE FROM your_table\nWHERE ROWID NOT IN (\n    SELECT MAX(ROWID)\n    FROM your_table\n    GROUP BY column1, column2, ... -- \u5217\u51fa\u7528\u4e8e\u533a\u5206\u8bb0\u5f55\u7684\u5217\n);\n<\/code><\/pre>\n<p>\u8fd9\u4e2a\u8bed\u53e5\u4f7f\u7528 <code>ROWID<\/code> \u4f2a\u5217\u6765\u786e\u5b9a\u8868\u4e2d\u7684\u552f\u4e00\u8bb0\u5f55\uff0c\u5e76\u5728 <code>DELETE<\/code> \u8bed\u53e5\u4e2d\u5220\u9664\u9664\u4e86\u6bcf\u7ec4\u4e2d\u7684\u6700\u5927 <code>ROWID<\/code> \u4e4b\u5916\u7684\u5176\u4ed6\u8bb0\u5f55\u3002<\/p>\n<p>\u8bf7\u786e\u4fdd\u5c06 <code>column1<\/code>, <code>column2<\/code>, &#8230; \u66ff\u6362\u4e3a\u5b9e\u9645\u7528\u4e8e\u533a\u5206\u8bb0\u5f55\u7684\u5217\u3002\u8fd9\u79cd\u65b9\u6cd5\u5047\u8bbe\u4f60\u60f3\u8981\u4fdd\u7559\u6bcf\u7ec4\u4e2d\u7684\u6700\u5927 <code>ROWID<\/code> \u5bf9\u5e94\u7684\u8bb0\u5f55\uff0c\u4f46\u4f60\u53ef\u4ee5\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 ROWID \u4f2a\u5217\u6765\u5220\u9664\u8868\u4e2d\u7684\u91cd\u590d\u6570\u636e\u4e2d\u7684\u4e00\u6761\u3002\u4ee5\u4e0b\u662f\u4e00\u79cd\u57fa\u672c\u7684\u65b9\u6cd5\uff1a \u5047\u8bbe\u4f60 [&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-15817","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15817","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=15817"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15817\/revisions"}],"predecessor-version":[{"id":15818,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15817\/revisions\/15818"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15817"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15817"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15817"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}