标签：gate hone max mon _id phone insert mongo 通过
以下脚本实现功能为把word_info表通过word字段去重，并写到到word_info_new表里db.word_info.aggregate([
{$group:
{ _id:"$word" ,
meaning:{$max:"$meaning"},
usphonetic:{$max:"$usphonetic"}
}
}]).forEach(
function(dc){
db.word_info_new.insert(
{"word":dc._id,
"meaning":dc.meaning,
"usphonetic":dc.usphonetic
}
)}
);标签：gate hone max mon _id phone insert mongo 通过
原文地址：https://blog.51cto.com/mydbs/2407193
