{"id":8415,"date":"2023-11-28T20:27:30","date_gmt":"2023-11-28T12:27:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8415"},"modified":"2023-11-28T20:27:34","modified_gmt":"2023-11-28T12:27:34","slug":"mysql-zhong-lie-she-zhi-weiauto-increment-shi-ru-g","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/mysql-zhong-lie-she-zhi-weiauto-increment-shi-ru-g\/","title":{"rendered":"MySQL\u4e2d\u5217\u8bbe\u7f6e\u4e3aAUTO INCREMENT\u65f6\uff0c\u5982\u679c\u5728\u8868\u4e2d\u8fbe\u5230\u6700\u5927\u503c\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\u60c5\u51b5\uff1f"},"content":{"rendered":"<p>\u5b83\u4f1a\u505c\u6b62\u9012\u589e\uff0c\u4efb\u4f55\u8fdb\u4e00\u6b65\u7684\u63d2\u5165\u90fd\u5c06\u4ea7\u751f\u9519\u8bef\uff0c\u56e0\u4e3a\u5bc6\u94a5\u5df2\u88ab\u4f7f\u7528\u3002<br \/>\nMySQL \u4e2d in \u548c exists \u533a\u522b\uff1f<br \/>\nMySQL\u4e2d\u7684in\u8bed\u53e5\u662f\u628a\u5916\u8868\u548c\u5185\u8868\u4f5chash\u8fde\u63a5\uff0c\u800cexists\u8bed\u53e5\u662f\u5bf9\u5916\u8868\u4f5cloop\u5faa\u73af\uff0c\u6bcf\u6b21loop\u5faa\u73af\u518d\u5bf9\u5185\u8868\u8fdb\u884c\u67e5\u8be2\u3002\u4e00\u76f4\u5927\u5bb6\u90fd\u8ba4\u4e3aexists\u6bd4in\u8bed\u53e5\u7684\u6548\u7387\u8981\u9ad8\uff0c\u8fd9\u79cd\u8bf4\u6cd5\u5176\u5b9e\u662f\u4e0d\u51c6\u786e\u7684\u3002\u8fd9\u4e2a\u662f\u8981\u533a\u5206\u73af\u5883\u7684\u3002<br \/>\n1\u3001\t\u5982\u679c\u67e5\u8be2\u7684\u4e24\u4e2a\u8868\u5927\u5c0f\u76f8\u5f53\uff0c\u90a3\u4e48\u7528in\u548cexists\u5dee\u522b\u4e0d\u5927\u3002<br \/>\n2\u3001\t\u5982\u679c\u4e24\u4e2a\u8868\u4e2d\u4e00\u4e2a\u8f83\u5c0f\uff0c\u4e00\u4e2a\u662f\u5927\u8868\uff0c\u5219\u5b50\u67e5\u8be2\u8868\u5927\u7684\u7528exists,\u5b50\u67e5\u8be2\u8868\u5c0f\u7684\u7528in\u3002<br \/>\n3\u3001\tnot in\u548cnot exists\uff1a\u5982\u679c\u67e5\u8be2\u8bed\u53e5\u4f7f\u7528\u4e86 not in,\u90a3\u4e48\u5185\u5916\u8868\u90fd\u8fdb\u884c\u5168\u8868\u626b\u63cf\uff0c\u6ca1\u6709 \u7528\u5230\u7d22\u5f15\uff1b\u800cnot extsts\u7684\u5b50\u67e5\u8be2\u4f9d\u7136\u80fd\u7528\u5230\u8868\u4e0a\u7684\u7d22\u5f15\u3002\u6240\u4ee5\u65e0\u8bba\u90a3\u4e2a\u8868\u5927\uff0c\u7528not exists \u90fd\u6bd4not in\u8981\u5feb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b83\u4f1a\u505c\u6b62\u9012\u589e\uff0c\u4efb\u4f55\u8fdb\u4e00\u6b65\u7684\u63d2\u5165\u90fd\u5c06\u4ea7\u751f\u9519\u8bef\uff0c\u56e0\u4e3a\u5bc6\u94a5\u5df2\u88ab\u4f7f\u7528\u3002 MySQL \u4e2d in \u548c exists \u533a\u522b\uff1f [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[102],"tags":[],"class_list":["post-8415","post","type-post","status-publish","format-standard","hentry","category-db"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8415","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\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8415"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8415\/revisions"}],"predecessor-version":[{"id":8416,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8415\/revisions\/8416"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8415"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}