{"id":8944,"date":"2023-11-28T20:48:35","date_gmt":"2023-11-28T12:48:35","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8944"},"modified":"2023-11-28T20:48:38","modified_gmt":"2023-11-28T12:48:38","slug":"mysql-zhong-ru-he-xuan-ze-he-shi-de-fen-bu-shi-zhu","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/mysql-zhong-ru-he-xuan-ze-he-shi-de-fen-bu-shi-zhu\/","title":{"rendered":"MySQL\u4e2d\u5982\u4f55\u9009\u62e9\u5408\u9002\u7684\u5206\u5e03\u5f0f\u4e3b\u952e\u65b9\u6848\u5462\uff1f"},"content":{"rendered":"<p>1\u3001\t\u6570\u636e\u5e93\u81ea\u589e\u957f\u5e8f\u5217\u6216\u5b57\u6bb5\u3002<br \/>\n2\u3001\tUUID<br \/>\n3\u3001\tRedis \u751f\u6210 ID<br \/>\n4\u3001\tTwitter \u7684 snowflake \u7b97\u6cd5<br \/>\n5\u3001\t\u5229\u7528zookeeper\u751f\u6210\u552f\u4e00 ID<br \/>\n6\u3001\tMongoDB \u7684 Objectld<br \/>\nMySQL \u4e2d varchar(50)\u4e2d 50 \u7684\u6db5\u4e49\uff1f<br \/>\n1,\u5b57\u6bb5\u6700\u591a\u5b58\u653e50\u4e2a\u5b57\u7b26<br \/>\n2\u3001\t\u5982varchar(50)\u548cvarchar(200)\u5b58\u50a8&quot;jay&quot;\u5b57\u7b26\u4e32\u6240\u5360\u7a7a\u95f4\u662f\u4e00\u6837\u7684\uff0c\u540e\u8005\u5728\u6392\u5e8f\u65f6\u4f1a\u6d88\u8017\u66f4\u591a\u5185\u5b58<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(\u504f\u79fb\u91cf)\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(id\u4e3a\u7d22\u5f15)<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(\u5148\u5feb\u901f\u5b9a\u4f4d\u9700\u8981\u83b7\u53d6\u7684id\u6bb5\uff0c\u7136\u540e\u518d\u5173\u8054)<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 \u6570\u636e\u5e93\u81ea\u589e\u957f\u5e8f\u5217\u6216\u5b57\u6bb5\u3002 2\u3001 UUID 3\u3001 Redis \u751f\u6210 ID 4\u3001 Twitter \u7684 sno [&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-8944","post","type-post","status-publish","format-standard","hentry","category-db"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8944","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=8944"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8944\/revisions"}],"predecessor-version":[{"id":8945,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8944\/revisions\/8945"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8944"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}