欢迎使用CSDN-markdown编辑器

mongoDB 嵌套Array聚合查询

db.article_words.aggregate([     { $match: { "content.word": {$in: ["美女"] } } },     { $unwind: "$content" },    { $group: {      _id: "$content.word",       tf:{$sum:"$content.tf"},       keys:{ $sum:"$content.count"},       articles:{$sum: 1}     } }])