{"id":15473,"date":"2023-12-04T20:19:39","date_gmt":"2023-12-04T12:19:39","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15473"},"modified":"2023-12-04T20:20:27","modified_gmt":"2023-12-04T12:20:27","slug":"oracle-zhong-in-yu-exists-de-qu-bie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-in-yu-exists-de-qu-bie\/","title":{"rendered":"Oracle \u4e2d in \u4e0e exists \u7684\u533a\u522b\uff1f"},"content":{"rendered":"<p><code>IN<\/code> \u548c <code>EXISTS<\/code> \u662f\u4e24\u79cd\u7528\u4e8e\u67e5\u8be2\u7684\u6761\u4ef6\u8bed\u53e5\uff0c\u867d\u7136\u5b83\u4eec\u90fd\u53ef\u4ee5\u7528\u4e8e\u5b50\u67e5\u8be2\uff0c\u4f46\u6709\u7740\u4e0d\u540c\u7684\u4f5c\u7528\u548c\u7528\u6cd5\u3002<\/p>\n<p><strong><code>IN<\/code>\uff1a<\/strong><\/p>\n<ul>\n<li><code>IN<\/code> \u662f\u7528\u6765\u68c0\u67e5\u4e00\u4e2a\u503c\u662f\u5426\u5728\u4e00\u7ec4\u503c\u4e2d\u7684\u6761\u4ef6\u8bed\u53e5\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u6bd4\u8f83\u4e00\u4e2a\u5217\u6216\u8868\u8fbe\u5f0f\u662f\u5426\u5728\u4e00\u4e2a\u56fa\u5b9a\u7684\u503c\u5217\u8868\u4e2d\u3002<\/li>\n<li><code>IN<\/code> \u5b50\u67e5\u8be2\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u4e2d\u7684\u503c\u4f1a\u4e0e\u5916\u90e8\u67e5\u8be2\u8fdb\u884c\u5339\u914d\u3002\u5982\u679c\u5b50\u67e5\u8be2\u8fd4\u56de\u7684\u7ed3\u679c\u96c6\u4e2d\u5305\u542b\u5916\u90e8\u67e5\u8be2\u4e2d\u7684\u503c\uff0c\u5219\u6761\u4ef6\u4e3a\u771f\u3002<\/li>\n<li><code>IN<\/code> \u9002\u7528\u4e8e\u786e\u5b9a\u4e00\u4e2a\u503c\u662f\u5426\u5c5e\u4e8e\u4e00\u4e2a\u9759\u6001\u5217\u8868\uff0c\u4f8b\u5982\uff1a<code>WHERE column_name IN (value1, value2, ...)<\/code>\u3002<\/li>\n<\/ul>\n<p><strong><code>EXISTS<\/code>\uff1a<\/strong><\/p>\n<ul>\n<li><code>EXISTS<\/code> \u7528\u4e8e\u68c0\u67e5\u5b50\u67e5\u8be2\u662f\u5426\u8fd4\u56de\u4e86\u4efb\u4f55\u884c\u3002\u5b83\u4e0d\u5173\u5fc3\u5b50\u67e5\u8be2\u8fd4\u56de\u7684\u5177\u4f53\u503c\u662f\u4ec0\u4e48\uff0c\u53ea\u5173\u5fc3\u5b50\u67e5\u8be2\u662f\u5426\u6709\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<li><code>EXISTS<\/code> \u5b50\u67e5\u8be2\u8fd4\u56de\u7684\u662f\u4e00\u4e2a\u5e03\u5c14\u503c\uff08TRUE \u6216 FALSE\uff09\uff0c\u5982\u679c\u5b50\u67e5\u8be2\u8fd4\u56de\u81f3\u5c11\u4e00\u884c\u8bb0\u5f55\uff0c\u5219\u6761\u4ef6\u4e3a\u771f\u3002<\/li>\n<li><code>EXISTS<\/code> \u901a\u5e38\u7528\u4e8e\u68c0\u67e5\u76f8\u5173\u5b50\u67e5\u8be2\u662f\u5426\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\uff0c\u4f8b\u5982\uff1a<code>WHERE EXISTS (SELECT * FROM another_table WHERE condition)<\/code>\u3002<\/li>\n<\/ul>\n<p><strong>\u533a\u522b\u603b\u7ed3\uff1a<\/strong><\/p>\n<ul>\n<li><code>IN<\/code> \u7528\u4e8e\u6bd4\u8f83\u4e00\u4e2a\u503c\u662f\u5426\u5728\u4e00\u4e2a\u56fa\u5b9a\u5217\u8868\u4e2d\uff0c\u800c <code>EXISTS<\/code> \u7528\u4e8e\u68c0\u67e5\u5b50\u67e5\u8be2\u662f\u5426\u8fd4\u56de\u4e86\u4efb\u4f55\u884c\u3002<\/li>\n<li><code>IN<\/code> \u68c0\u67e5\u5177\u4f53\u7684\u503c\uff0c\u800c <code>EXISTS<\/code> \u53ea\u5173\u5fc3\u662f\u5426\u6709\u8fd4\u56de\u7ed3\u679c\u3002<\/li>\n<li><code>IN<\/code> \u9002\u7528\u4e8e\u9759\u6001\u503c\u5217\u8868\u7684\u6bd4\u8f83\uff0c\u800c <code>EXISTS<\/code> \u901a\u5e38\u7528\u4e8e\u5173\u8054\u67e5\u8be2\u548c\u5b50\u67e5\u8be2\u4e2d\u3002<\/li>\n<\/ul>\n<p>\u9009\u62e9\u4f7f\u7528\u54ea\u79cd\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u60c5\u51b5\u548c\u9700\u6c42\uff0c\u901a\u5e38\u5728\u5904\u7406\u5173\u8054\u67e5\u8be2\u548c\u52a8\u6001\u6570\u636e\u96c6\u5408\u65f6\uff0c<code>EXISTS<\/code> \u66f4\u4e3a\u5e38\u7528\uff0c\u800c <code>IN<\/code> \u9002\u7528\u4e8e\u56fa\u5b9a\u7684\u503c\u5217\u8868\u6bd4\u8f83\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>IN \u548c EXISTS \u662f\u4e24\u79cd\u7528\u4e8e\u67e5\u8be2\u7684\u6761\u4ef6\u8bed\u53e5\uff0c\u867d\u7136\u5b83\u4eec\u90fd\u53ef\u4ee5\u7528\u4e8e\u5b50\u67e5\u8be2\uff0c\u4f46\u6709\u7740\u4e0d\u540c\u7684\u4f5c\u7528\u548c\u7528\u6cd5\u3002 IN\uff1a  [&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-15473","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15473","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=15473"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15473\/revisions"}],"predecessor-version":[{"id":15474,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15473\/revisions\/15474"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15473"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15473"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15473"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}