{"id":15448,"date":"2023-12-04T20:12:25","date_gmt":"2023-12-04T12:12:25","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15448"},"modified":"2023-12-04T20:13:17","modified_gmt":"2023-12-04T12:13:17","slug":"oracle-zhong-shu-ju-ku-sql-cha-xun-ba-shu-ju-wei-k","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-shu-ju-ku-sql-cha-xun-ba-shu-ju-wei-k\/","title":{"rendered":"Oracle \u4e2d\u6570\u636e\u5e93 sql \u67e5\u8be2\u628a\u6570\u636e\u4e3a\u7a7a\u7684\u9879\u663e\u793a\u4e3a0\uff0c\u7528 sql \u67e5\u8be2\u8868\u793a\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 <code>NVL<\/code> \u51fd\u6570\u5c06\u7a7a\u503c\u663e\u793a\u4e3a 0\u3002<code>NVL<\/code> \u51fd\u6570\u53ef\u4ee5\u5c06 NULL \u503c\u66ff\u6362\u4e3a\u53e6\u4e00\u4e2a\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<p>\u5047\u8bbe\u6709\u4e00\u4e2a\u8868 <code>your_table<\/code>\uff0c\u5176\u4e2d\u6709\u4e00\u4e2a\u5217 <code>your_column<\/code> \u5b58\u5728\u7a7a\u503c\uff08NULL\uff09\uff1a<\/p>\n<pre><code class=\"language-sql  line-numbers\">SELECT NVL(your_column, 0) AS your_alias\nFROM your_table;\n<\/code><\/pre>\n<p>\u8fd9\u5c06\u4f1a\u5c06 <code>your_column<\/code> \u5217\u4e2d\u7684 NULL \u503c\u66ff\u6362\u4e3a 0 \u5e76\u663e\u793a\u5728\u67e5\u8be2\u7ed3\u679c\u4e2d\u3002\u4f60\u53ef\u4ee5\u5c06 <code>your_column<\/code> \u548c <code>your_table<\/code> \u66ff\u6362\u4e3a\u4f60\u5b9e\u9645\u4f7f\u7528\u7684\u5217\u540d\u548c\u8868\u540d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 NVL \u51fd\u6570\u5c06\u7a7a\u503c\u663e\u793a\u4e3a 0\u3002NVL \u51fd\u6570\u53ef\u4ee5\u5c06 NULL \u503c\u66ff\u6362\u4e3a\u53e6\u4e00\u4e2a\u503c [&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-15448","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15448","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=15448"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15448\/revisions"}],"predecessor-version":[{"id":15449,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15448\/revisions\/15449"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15448"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15448"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}