mongodb数据分组按字符串split
2018-12-25 17:15 slmk 阅读(2704) 评论(0) 收藏 举报db.getCollection('users').aggregate([
{$match:{ZWBH:11}},
{$unwind:'$UUID'},
{$project : { PM : { $split: ["$UUID.name", " "] } } },
{$project: {PM:{ $arrayElemAt: [ "$PM", 0 ]}}},
{$project: {PM:{ $toLower: "$PM"}}},
{$group:{_id:'$PM',sum:{$sum:1}}},
{$sort:{sum:-1}}
])
分组用户所用的手机品牌数量,其中UUID的格式是:
"UUID" : [ { "id" : "xxxxxx", "name" : "HUAWEI DUK-AL20" } ],
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