{"id":7571,"date":"2023-11-28T19:39:12","date_gmt":"2023-11-28T11:39:12","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7571"},"modified":"2023-11-28T19:39:17","modified_gmt":"2023-11-28T11:39:17","slug":"mysql-zhong-shen-me-qing-kuang-xia-she-zhi-le-suo","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/mysql-zhong-shen-me-qing-kuang-xia-she-zhi-le-suo\/","title":{"rendered":"MySQL\u4e2d\u4ec0\u4e48\u60c5\u51b5\u4e0b\u8bbe\u7f6e\u4e86\u7d22\u5f15\u4f46\u65e0\u6cd5\u4f7f\u7528\uff1f"},"content":{"rendered":"<p>1\u3001\t\u4ee5\u201c\uff05\u201d\u5f00\u5934\u7684LIKE\u8bed\u53e5\uff0c\u6a21\u7cca\u5339\u914d<br \/>\n2\u3001\tOR\u8bed\u53e5\u524d\u540e\u6ca1\u6709\u540c\u65f6\u4f7f\u7528\u7d22\u5f15<br \/>\n3\u3001\t\u6570\u636e\u7c7b\u578b\u51fa\u73b0\u9690\u5f0f\u8f6c\u5316\uff08\u5982varchar\u4e0d\u52a0\u5355\u5f15\u53f7\u7684\u8bdd\u53ef\u80fd\u4f1a\u81ea\u52a8\u8f6c\u6362\u4e3aint\u578b\uff09<br \/>\nMySQL\u4e2dlimit 1000000\u52a0\u8f7d\u5f88\u6162\u7684\u8bdd\uff0c\u4f60\u662f\u600e\u4e48\u89e3\u51b3\u7684\u5462\uff1f<br \/>\n\u65b9\u6848\u4e00\uff1a\u5982\u679cid\u662f\u8fde\u7eed\u7684\uff0c\u53ef\u4ee5\u8fd9\u6837\uff0c\u8fd4\u56de\u4e0a\u6b21\u67e5\u8be2\u7684\u6700\u5927\u8bb0\u5f55\uff08\u504f\u79fb\u91cf\uff09\uff0c\u518d\u5f80\u4e0blimit<br \/>\nselect id, name from employee where id&gt;1000000 limit 10.<br \/>\n\u65b9\u6848\u4e8c\uff1a\u5728\u4e1a\u52a1\u5141\u8bb8\u7684\u60c5\u51b5\u4e0b\u9650\u5236\u9875\u6570\uff1a<br \/>\n\u5efa\u8bae\u8ddf\u4e1a\u52a1\u8ba8\u8bba\uff0c\u6709\u6ca1\u6709\u5fc5\u8981\u67e5\u8fd9\u4e48\u540e\u7684\u5206\u9875\u5566\u3002\u56e0\u4e3a\u7edd\u5927\u591a\u6570\u7528\u6237\u90fd\u4e0d\u4f1a\u5f80\u540e\u7ffb\u592a\u591a\u9875\u3002<br \/>\n\u65b9\u6848\u4e09\uff1aorder by +\u7d22\u5f15\uff08id\u4e3a\u7d22\u5f15\uff09<br \/>\nselect id, name from employee order by id limit 1000000, 10<br \/>\n\u65b9\u6848\u56db\uff1a\u5229\u7528\u5ef6\u8fdf\u5173\u8054\u6216\u8005\u5b50\u67e5\u8be2\u4f18\u5316\u8d85\u591a\u5206\u9875\u573a\u666f\u3002\uff08\u5148\u5feb\u901f\u5b9a\u4f4d\u9700\u8981\u83b7\u53d6\u7684id\u6bb5\uff0c\u7136\u540e\u518d\u5173\u8054\uff09<br \/>\nSELECT a.* FROM employee a, (select id from employee where \u6761\u4ef6 LIMIT 1000000, 10 ) b where a.id=b.id<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001 \u4ee5\u201c\uff05\u201d\u5f00\u5934\u7684LIKE\u8bed\u53e5\uff0c\u6a21\u7cca\u5339\u914d 2\u3001 OR\u8bed\u53e5\u524d\u540e\u6ca1\u6709\u540c\u65f6\u4f7f\u7528\u7d22\u5f15 3\u3001 \u6570\u636e\u7c7b\u578b\u51fa\u73b0\u9690\u5f0f\u8f6c\u5316\uff08\u5982 [&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-7571","post","type-post","status-publish","format-standard","hentry","category-db"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7571","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=7571"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7571\/revisions"}],"predecessor-version":[{"id":7572,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7571\/revisions\/7572"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=7571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=7571"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=7571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}