{"id":15944,"date":"2023-12-04T23:46:40","date_gmt":"2023-12-04T15:46:40","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15944"},"modified":"2023-12-05T00:17:25","modified_gmt":"2023-12-04T16:17:25","slug":"oracle-zhong-zi-fu-chuan-yong-shen-me-fu-hao-lian","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-zi-fu-chuan-yong-shen-me-fu-hao-lian\/","title":{"rendered":"Oracle \u4e2d\u5b57\u7b26\u4e32\u7528\u4ec0\u4e48\u7b26\u53f7\u94fe\u63a5\uff1f"},"content":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u5b57\u7b26\u4e32\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u4e3b\u8981\u7684\u7b26\u53f7\u8fdb\u884c\u8fde\u63a5\uff1a<\/p>\n<ol>\n<li><strong>\u53cc\u7ad6\u7ebf\u7b26\u53f7 (<code>||<\/code>)\uff1a<\/strong>\n<ul>\n<li>\u5728 Oracle \u4e2d\uff0c\u53cc\u7ad6\u7ebf\u7b26\u53f7 <code>||<\/code> \u7528\u4e8e\u5b57\u7b26\u4e32\u7684\u8fde\u63a5\u64cd\u4f5c\u3002\u4f8b\u5982\uff1a\n<pre><code class=\"language-sql  line-numbers\">SELECT 'Hello, ' || 'World' AS result FROM dual;\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8be2\u5c06\u8fd4\u56de\u5b57\u7b26\u4e32 <code>'Hello, World'<\/code>\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>CONCAT \u51fd\u6570\uff1a<\/strong><\/p>\n<ul>\n<li>Oracle \u4e5f\u63d0\u4f9b\u4e86 <code>CONCAT<\/code> \u51fd\u6570\u7528\u4e8e\u5b57\u7b26\u4e32\u8fde\u63a5\u3002\u4f8b\u5982\uff1a\n<pre><code class=\"language-sql  line-numbers\">SELECT CONCAT('Hello, ', 'World') AS result FROM dual;\n<\/code><\/pre>\n<p>\u8fd9\u4e5f\u5c06\u8fd4\u56de\u5b57\u7b26\u4e32 <code>'Hello, World'<\/code>\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u4e24\u8005\u53ef\u4ee5\u6839\u636e\u4e2a\u4eba\u504f\u597d\u6216\u9879\u76ee\u89c4\u8303\u7684\u8981\u6c42\u9009\u62e9\u4f7f\u7528\u3002 <code>||<\/code> \u7b26\u53f7\u66f4\u4e3a\u5e38\u89c1\uff0c\u800c <code>CONCAT<\/code> \u51fd\u6570\u63d0\u4f9b\u4e86\u4e00\u79cd\u66ff\u4ee3\u7684\u5b57\u7b26\u4e32\u8fde\u63a5\u65b9\u5f0f\u3002\u5728 SQL \u6807\u51c6\u4e2d\uff0c<code>||<\/code> \u662f\u5b57\u7b26\u4e32\u8fde\u63a5\u7684\u6807\u51c6\u7b26\u53f7\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Oracle \u4e2d\uff0c\u5b57\u7b26\u4e32\u53ef\u4ee5\u4f7f\u7528\u4e24\u79cd\u4e3b\u8981\u7684\u7b26\u53f7\u8fdb\u884c\u8fde\u63a5\uff1a \u53cc\u7ad6\u7ebf\u7b26\u53f7 (||)\uff1a \u5728 Oracle \u4e2d\uff0c\u53cc [&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-15944","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15944","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=15944"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15944\/revisions"}],"predecessor-version":[{"id":15945,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15944\/revisions\/15945"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15944"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}