{"id":1851,"date":"2019-12-21T12:12:48","date_gmt":"2019-12-21T04:12:48","guid":{"rendered":"http:\/\/www.ouvps.com\/?p=1851"},"modified":"2019-12-21T12:12:56","modified_gmt":"2019-12-21T04:12:56","slug":"mongodb-split%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%90%8e%e5%88%86%e7%bb%84%e7%bb%9f%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/eepu.top\/?p=1851","title":{"rendered":"Mongodb split\u5b57\u7b26\u4e32\u540e\u5206\u7ec4\u7edf\u8ba1"},"content":{"rendered":"

db.getCollection(‘Information’).aggregate([{ $project : { birth : { $split: [“$birthday”, “-“] } } }, {$unwind:”$birth”}, {$match:{birth:\/[0-9]{4}\/}},{$group : {_id : “$birth”, num : {$sum : 1}}},{$sort:{_id:1}}])<\/p>\n

\u8f93\u51fa\u7ed3\u679c\uff1a
\n\/* 1 *\/
\n{
\n“_id” : “1996”,
\n“num” : 104.0
\n}<\/p>\n

\/* 2 *\/
\n{
\n“_id” : “1997”,
\n“num” : 118.0
\n}<\/p>\n

\u539f\u59cb\u6570\u636e\u683c\u5f0f\uff1a
\n{
\n“_id” : “6478413887”,
\n“crawl_time” : 1576841589,
\n“nick_name” : “12\u5c0f\u65f6\u67e0\u6aac6478413887”,
\n“gender” : “\u7537”,
\n“province” : “\u5c71\u4e1c”,
\n“city” : “\u6d4e\u5357”,
\n“birthday” : “1979-06-13”,
\n“vip_level” : “\u672a\u5f00\u901a”,
\n“tweets_num” : 1,
\n“follows_num” : 344,
\n“fans_num” : 4
\n}<\/p>\n","protected":false},"excerpt":{"rendered":"

db.getCollection(‘Information’).aggregate([ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[78,77],"tags":[],"_links":{"self":[{"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/posts\/1851"}],"collection":[{"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eepu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1851"}],"version-history":[{"count":1,"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/posts\/1851\/revisions"}],"predecessor-version":[{"id":1852,"href":"https:\/\/eepu.top\/index.php?rest_route=\/wp\/v2\/posts\/1851\/revisions\/1852"}],"wp:attachment":[{"href":"https:\/\/eepu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/eepu.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/eepu.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}