{"id":16367,"date":"2023-12-05T10:17:53","date_gmt":"2023-12-05T02:17:53","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=16367"},"modified":"2023-12-16T11:49:04","modified_gmt":"2023-12-16T03:49:04","slug":"elasticsearch-ju-he-shi-shen-me","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/05\/elasticsearch-ju-he-shi-shen-me\/","title":{"rendered":"Elasticsearch\u805a\u5408\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"<p>\u5728Elasticsearch\u4e2d\uff0c\u805a\u5408\uff08Aggregation\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u5de5\u5177\uff0c\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u6c47\u603b\u3001\u5206\u6790\u548c\u7edf\u8ba1\u3002\u805a\u5408\u5141\u8bb8\u4f60\u57fa\u4e8e\u7d22\u5f15\u4e2d\u7684\u6570\u636e\u6267\u884c\u5404\u79cd\u590d\u6742\u7684\u8ba1\u7b97\uff0c\u7c7b\u4f3c\u4e8eSQL\u4e2d\u7684GROUP BY\u548c\u805a\u5408\u51fd\u6570\u7684\u6982\u5ff5\u3002\u901a\u8fc7\u805a\u5408\u64cd\u4f5c\uff0c\u4f60\u53ef\u4ee5\u83b7\u53d6\u5173\u4e8e\u6570\u636e\u96c6\u7684\u6709\u7528\u4fe1\u606f\uff0c\u5982\u603b\u548c\u3001\u5e73\u5747\u503c\u3001\u6700\u5c0f\u503c\u3001\u6700\u5927\u503c\u3001\u767e\u5206\u6bd4\u7b49\u7edf\u8ba1\u4fe1\u606f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684Elasticsearch\u805a\u5408\u7c7b\u578b\uff1a<\/p>\n<ol>\n<li>\n<strong>\u6876\u805a\u5408\uff08Bucket Aggregations\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u6876\u805a\u5408\u5c06\u6587\u6863\u5206\u6210\u4e0d\u540c\u7684\u6876\uff08buckets\uff09\uff0c\u6bcf\u4e2a\u6876\u4ee3\u8868\u4e00\u4e2a\u6570\u636e\u96c6\u5408\u3002\u5e38\u89c1\u7684\u6876\u805a\u5408\u6709\uff1a\n<ul>\n<li><strong>Terms Aggregation\uff1a<\/strong> \u57fa\u4e8e\u5b57\u6bb5\u503c\u8fdb\u884c\u5206\u7ec4\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u5206\u7ec4\u7684\u6587\u6863\u6570\u91cf\u3002<\/li>\n<li><strong>Date Histogram Aggregation\uff1a<\/strong> \u5c06\u6587\u6863\u6309\u65e5\u671f\u8303\u56f4\u8fdb\u884c\u5206\u7ec4\uff0c\u5e76\u5728\u6bcf\u4e2a\u65e5\u671f\u8303\u56f4\u5185\u8fdb\u884c\u7edf\u8ba1\u3002<\/li>\n<li><strong>Range Aggregation\uff1a<\/strong> \u5c06\u6587\u6863\u6309\u5b57\u6bb5\u503c\u7684\u8303\u56f4\u8fdb\u884c\u5206\u7ec4\uff0c\u7edf\u8ba1\u6bcf\u4e2a\u8303\u56f4\u5185\u7684\u6587\u6863\u6570\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5ea6\u91cf\u805a\u5408\uff08Metric Aggregations\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5ea6\u91cf\u805a\u5408\u7528\u4e8e\u8ba1\u7b97\u6570\u503c\u578b\u5b57\u6bb5\u7684\u7edf\u8ba1\u4fe1\u606f\uff0c\u4f8b\u5982\u603b\u548c\u3001\u5e73\u5747\u503c\u3001\u6700\u5c0f\u503c\u3001\u6700\u5927\u503c\u7b49\u3002\u5e38\u89c1\u7684\u5ea6\u91cf\u805a\u5408\u6709\uff1a\n<ul>\n<li><strong>Sum Aggregation\uff1a<\/strong> \u8ba1\u7b97\u5b57\u6bb5\u503c\u7684\u603b\u548c\u3002<\/li>\n<li><strong>Avg Aggregation\uff1a<\/strong> \u8ba1\u7b97\u5b57\u6bb5\u503c\u7684\u5e73\u5747\u503c\u3002<\/li>\n<li><strong>Min Aggregation\uff1a<\/strong> \u627e\u51fa\u5b57\u6bb5\u503c\u7684\u6700\u5c0f\u503c\u3002<\/li>\n<li><strong>Max Aggregation\uff1a<\/strong> \u627e\u51fa\u5b57\u6bb5\u503c\u7684\u6700\u5927\u503c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5d4c\u5957\u805a\u5408\uff08Nested Aggregations\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5d4c\u5957\u805a\u5408\u5141\u8bb8\u5728\u5176\u4ed6\u805a\u5408\u7ed3\u679c\u4e0a\u6267\u884c\u8fdb\u4e00\u6b65\u7684\u805a\u5408\u64cd\u4f5c\uff0c\u4ee5\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u5206\u6790\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>Pipeline\u805a\u5408\uff08Pipeline Aggregations\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>Pipeline\u805a\u5408\u57fa\u4e8e\u5148\u524d\u805a\u5408\u7684\u7ed3\u679c\u6267\u884c\u8fdb\u4e00\u6b65\u7684\u8ba1\u7b97\uff0c\u4f8b\u5982\u8ba1\u7b97\u79fb\u52a8\u5e73\u5747\u503c\u6216\u7d2f\u79ef\u548c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u901a\u8fc7\u4f7f\u7528\u8fd9\u4e9b\u805a\u5408\u64cd\u4f5c\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u4ece\u5927\u89c4\u6a21\u7684\u6570\u636e\u96c6\u4e2d\u63d0\u53d6\u6709\u5173\u6570\u636e\u5206\u5e03\u3001\u8d8b\u52bf\u548c\u7edf\u8ba1\u4fe1\u606f\u7684\u89c1\u89e3\u3002\u805a\u5408\u662fElasticsearch\u5f3a\u5927\u67e5\u8be2\u8bed\u8a00\u7684\u4e00\u90e8\u5206\uff0c\u5bf9\u4e8e\u6570\u636e\u5206\u6790\u548c\u53ef\u89c6\u5316\u975e\u5e38\u6709\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Elasticsearch\u4e2d\uff0c\u805a\u5408\uff08Aggregation\uff09\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u6570\u636e\u5904\u7406\u5de5\u5177\uff0c\u7528\u4e8e\u5bf9\u6570\u636e\u8fdb\u884c\u6c47\u603b\u3001\u5206 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[125],"tags":[],"class_list":["post-16367","post","type-post","status-publish","format-standard","hentry","category-elasticsearch"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16367","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\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=16367"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16367\/revisions"}],"predecessor-version":[{"id":48445,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/16367\/revisions\/48445"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=16367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=16367"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=16367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}